The PC does not show all RAM boards. The computer does not see RAM: possible causes, diagnostics, instructions and tips for fixing the problem

One way to improve computer performance is to increase the amount of RAM. This method is available not only on desktop computer, but also a laptop and is considered one of the easiest hardware to upgrade. But sometimes situations arise when you add to the computer RAM, and windows shows that it is not available to him. In this article, I will use my example to show what could be the reason that Windows does not see all the installed RAM.

One day I had to assemble a computer for my friends. I do this extremely rarely, but since I am a “computer geek”, I also have to repair computer furniture :) In general, I used the following components for assembly:

Motherboard ASUS M5A97 R2.0;

AMD processor FX-8350 Black Edition, OEM;

Operational DIMM memory DDR3, 8GB (2x4GB), Kingston HyperX FURY blue;

Cooler Zalman CNPS10X Performa.

After I assembled everything, I didn’t see another 4 GB of RAM in the BIOS, i.e. instead of 8, there were 4GB. Having rummaged through the settings, I saw that the motherboard “sees” both memory sticks, but for some reason its final value was 4GB. Windows installation It didn’t bring any clarity, but made it even more confusing. Specifically, in Computer Properties there was "Installed memory (RAM): 8 GB (3.90 GB available)".

After looking at the resource monitor, I finally came to a dead end, 4 GB was occupied by “Reserved Equipment”.

I began to figure out step by step how to solve this problem and I will describe all my thoughts and actions step by step from the simplest and obvious way to dancing with a tambourine. Please note that if in your case the BIOS does not “see” part or all of the RAM, then of all the methods, pay more attention to setting up the BIOS and the hardware. If the entire amount of RAM is available in the BIOS, but not in Windows, then among all the methods listed below, select only those that relate to windows settings.

Check the bitness of the operating system.

First of all, in the system properties, look at the bit depth of the operating system. We must not forget that 32-bit Windows systems have a limit of 4 GB of RAM, and even if you install 16 GB, the computer will not see them (there are workarounds, but that’s not the point now and they do not always work correctly).

If you want to use more than 4 GB of RAM, you must reinstall the system to 64-bit.

Your version of windows has a RAM limit.

Each version of Windows has its own limit of RAM with which it can work, for example:

Maximum available amount of RAM on Windows 7

So first of all, check installed version windows.

Check your motherboard's limitations.

Each motherboard has limitations in the amount of perceived RAM. Older ones can see a maximum of 4 GB of memory, others 16 GB, and there are already those that can work with 32 GB or more. Therefore, in the documentation for motherboard or look at its capabilities on the manufacturer’s official website. Also note that the motherboard supports the operating frequency of the higher RAM.

Make sure there are no restrictions when loading Windows.

There are cases when restrictions are set on loading windows, so some of the RAM may be inaccessible. To check this, press the key combination “Win” + “R” and enter “msconfig” in the line.

Then open the "Download" tab, click the " Additional options".

In the window that opens, make sure that the checkbox next to the “Maximum memory” line is not checked.

You can try to enter the size of RAM you use in this field. In my case, this did not help; after I restarted the computer, the check mark remained and the value became 0.

Make sure the memory is working.

There are times when the RAM has failed or you have acquired a defective one, so check its functionality. Attention!!! All manipulations with RAM strips should be performed with the computer turned off. Take out all the memory sticks and plug one by one into the same port, after changing each stick, turn on the computer and in the BIOS or in Windows, make sure that the computer sees this memory stick. Or, on another work computer, check each strip or all together.

Shuffling RAM sticks.

For dual-channel operation of RAM sticks, it is recommended to use the same manufacturer and even the same model and the volume itself. If you are using different manufacturers, in this case, you can experimentally change the connector, connect the strips and determine the sequence in which the computer sees all your RAM.

BIOS update.

It is also important what version of BIOS is used on the motherboard. Very often, updating the BIOS leads to solving related problems, including the ability to “see” RAM. Here is an example of how to update the firmware on the motherboard ASUS board.

In my case, unfortunately, even this method did not help, although for some reason I was sure that it would help.

Reset BIOS settings.

One more is not enough important point- reset settings to factory defaults in BIOS. Someone may say that they have never changed anything there and why reset something there. In fact, I know of cases where resetting to factory settings actually solves problems for which the solution is not obvious. In order to reset the settings, press the "Exit" button in the BIOS and in the menu that appears, select "Load default settings" or remove the battery on the motherboard for a few seconds and put it back.

Cleaning the computer and checking connections.

One more in an effective way make your computer see all the RAM - clean the RAM sticks and ports from dust. Also, don’t forget to clean the processor, pull it out of the socket, and check if the legs are bent. Many will say that this method is the most ineffective, especially those who collect new computer, like me :) But he helped me. It turned out that either I didn’t insert the processor correctly (although I can’t imagine how you can insert it incorrectly without breaking several legs), or I overtightened the bolts holding the cooler (I think this version is more likely to be true), or the computer decided I don’t know that I would have given him a few more hours. But only after I removed the cooler, pulled out and reinstalled the processor, and installed it without tightening the cooler bolts too much, everything worked and the BIOS, and with it, windows saw the entire amount of RAM.

I really hope that this article will help you in solving problems related to RAM and you will spend less time fixing it. I would be grateful if you share your method of solving RAM-related problems in the comments.

pk-help.com

Why is all the RAM not visible?

Increasing RAM is one of the goals that many PC users strive for. But sometimes, after installing an additional memory stick, they may be disappointed, since the computer does not see all the RAM. We will look further at why all RAM is not visible in Windows 7, 8 and 10.

There may be several reasons why a computer may not see all of its RAM. For example, a 32-bit Windows operating system is installed on the computer. She will never see more than 3 GB of RAM, since she physically cannot do it. This problem is corrected by installing a 64-bit operating system.

There may be a situation when the system shows that there is actually as much memory installed as it should be, but there are several hundred megabytes less available. This is also easy to explain, since most likely the computer or laptop has a built-in video card, for which part of the memory is reserved.

Windows may have the Maximum Memory option selected, which will prevent it from using all the available memory. You can check this in the system configuration. Launch the “Run” panel with the key combination “Win ​​+ R”, enter the name of the utility “msconfig” and run it. In the “System Configuration” window, go to the “Boot” tab, click the “Advanced parameters...” button, and uncheck the box next to “Maximum memory”, if it is checked. After this, restart the computer.

Sometimes the problem is directly related to the hardware, but this mainly affects older motherboards. In such motherboards, more than 4 GB of RAM may not be visible. The first step is to look at the information about the motherboard and find out what maximum amount of memory it supports. The next step is to go into the BIOS, find one of the possible following parameters “Memory Remapping, DRAM Over 4G Remapping, H/W DRAM Over 4GB Remapping, H/W Memory Hole Remapping, Hardware Memory Hole, Memory Hole Remapping, Memory Remap Feature”, and set it to "Enabled". If none of the listed options are present, you can try updating the BIOS. Well, if the manufacturer has not implemented this option, only replacing the motherboard will help.

The last solution to the problem has no explanation, but sometimes it helps. If the motherboard is new and must support the installed amount of memory, you can try different options for installing memory sticks in different slots. It is quite possible that after the next rearrangement of memory strips, the system will see them all at once.

You might be interested in: Where is RAM located in a computer? How much RAM does windows need? How much RAM does the motherboard support? Best RAM timing

companduser.ru

Windows doesn't see all RAM

The number of questions related to the problem of system visibility of the entire amount of RAM does not decrease over time. It is worth noting that even users of 64-bit Windows also encounter this problem.

Let's try to figure out why, for example, the 32-bit version of the OS sees only 3 GB instead of 4 GB, and the 64-bit version sees 7 GB out of the installed 8 GB.

32 bits

In principle, 32-bit systems should have no problem accessing physical memory up to 4 GB. But in practice everything looks a little different. Such versions of Windows are not able to fully use the amount of RAM, since a certain part of the addresses is allocated to the needs of computer devices.

Typically, standard padding starts at position zero, and devices are allocated addresses located in the fourth gigabyte. As long as the amount of RAM used is within 3 GB, no conflicts are observed. When this volume is exceeded, a situation arises when RAM cells are combined with cells that are allocated for devices, for example, graphics adapter. To in this case To avoid conflicts, the OS refuses to use that part of RAM where device addresses overlap.

64 bit

Since 64-bit Windows systems are designed to work with up to 192 GB of RAM, it seems that there should certainly not be any problems here. Usually there are none, but certain situations are possible when you still have to deal with the fact that the system does not see the entire amount of RAM.

Firstly, special equipment is not provided for systems of this type, that is, any PC device is designed for both 32 and 64 bits. And this allows us to say that memory cells for devices are allocated within the same limits of four gigabytes. If your motherboard is unable to redirect or this function is disabled in the settings, then the memory limits on a 64-bit system will be the same as on a 32-bit system.

Of course, this situation can occur mainly on older machines. Although it should be noted that new PCs may also have a feature in the form of failure to route additional address lines, which prevents access to redirected memory. For example, in this situation, setting the volume to 8 GB will only allow access to 7 GB of memory. This may be due to the fact that only 33 address lines are routed on the motherboard.

In addition, the settings in the msconfig program, which regulate the upper limit of memory addresses, are related to redirection. If this setting will have a parameter of 4096 MB, then forwarding to the fifth gigabyte will be impossible and the actual memory size will be reduced to 3 GB. To avoid this, disable this setting if you have it enabled:

• enter in search bar yours windows name programs - msconfig, which will allow you to access it;
• Open the “Download” tab and select “Advanced options”, and in it uncheck the “Maximum memory” item.

Why else doesn't Windows see the full amount of RAM?

1. There are restrictions depending on windows releases. For example, the initial Windows 7 only supports 2 GB in both the 32-bit and 64-bit versions.
2. The problem may be an old BIOS version. Outdated version will not allow access to the entire physical amount of memory.
3. There may be problems with installing the memory stick into the slot. To solve this problem, turn off the computer and if you have two memory sticks, then swap them, which will allow you to identify the problem.

How to find out the amount of available and installed memory in Windows 7?

1. Activate the “Start” button and right-click on the “Computer” item, where you should select the “Properties” line.
2. In the window that opens, you will see a line with the total amount of RAM, and in brackets - available.

pauk-info.ru

Windows doesn't see all the RAM.

Installation of operational RAM memory is that you need to insert RAM modules into the slot.

Start the computer and everything should work.

In fact, they meet various problems, in which RAM is not fully detected.

This problem can be either software or hardware.

In this article we will look at more common reasons causing these situations when Windows does not see all the memory.

The first and most basic reason is bit windows, that is, 32-bit OS can use a maximum of 4GB of memory.

And then 3.75 GB will be displayed, most often 3.25 GB.

If more than 4 GB of memory is installed, then you need to install a 64-bit Operating system.

To determine what operating system you have installed, right-click on my computer and select property.

Amount of memory in properties Amount of memory in properties

1) We see the installed memory (RAM), this amount of installed memory can also be indicated in parentheses indicating how much can be used.

2) Also just below the system type we see how many bits the operating system is.

It is also worth mentioning the versions of Windows that have restrictions on the maximum amount of memory.

Since Windows 7 Starter exists only in 32-bit version and has a limit of 2 GB and not 4 GB.

Windows 7 Home Basic has a limit of 8 GB in the 64-bit version, and also 4 GB in 32

I present to you a table of the maximum amount of memory used operating system.

Maximum amount of available RAM memory in Windows 8

From the table above you can see that all 32-bit operating systems see a maximum of 4 GB. Also applies to windows xp,

U windows vista volumes are the same as in windows 7

Memory can also be allocated for the operation of the built-in video card.

Amount of memory occupied by the integrated video card Amount of memory occupied by the integrated video card

This can also be seen in the system properties, this difference between installed and available (which is in parentheses).

Motherboards also have limitations on the amount of RAM they can install.

This means that if all installed modules fit into the motherboard.

However, it turned on, which does not mean that it can work with all this memory.

Before you buy additional RAM, you first need to know maximum possibilities motherboard.

This information can be found on the official website of the motherboard manufacturer.

You can also check by going into bios and seeing how much RAM is determined.

We enter bios using the del key when starting the OS.

If everything is determined in bios, then we are looking for a problem in windows.

If not, then we are looking for a problem in the motherboard or the memory modules themselves.

But again, I’ll make a reservation that you need to first look at the specification of the motherboard.

In the event that not all memory is detected by bios, and the amount of memory that you inserted is stated by the manufacturer.

Then you should carefully check whether you installed it correctly.

I also advise you to clean the contacts with an eraser and check if all the memory is visible.

Below in the picture you can see a problem caused by dust on which one die does not work, the system sees it, and the memory is not used.

Cleaning with an eraser solved the problem that Windows does not see all the memory.

Not all memory is seen by Windows. All memory is seen by Windows.

To simplify the test, insert 1 die at a time and check which of them is not detected.

When you find one die that works, try inserting it into different slots. The connector itself may be damaged.

or also check through tests which of the modules is not working.

tests use Metest 86 or through the standard one from Windows.

Checking RAM MemTest+86

Also, the main reason may be the frequency of the RAM, which is not supported by your motherboard.

see here markings and frequencies Characteristics of RAM.

atlant-pc.ru

And the whole world is not enough

What to do if Windows does not see all the RAM?

This means that Windows does not see all the RAM installed on the computer. Despite the fact that the motherboard has 4 GB of memory, the system sees only 3.25 GB.

We carry out the following manipulation:

Let me remind you once again that this article is only about x64 OS.

There is no need to say that the more RAM there is in a computer or laptop, the better. We constantly need it for correct and fast work programs, games, videos. Therefore, our task is to make the computer use its hardware to its fullest extent.

Sometimes Comodo antivirus does not update antivirus database. Read how to deal with this here.

from 270 rub. RUB

RAM becomes the cause of many troubles in a computer. For example, its quantity is one of the key factors on which the possibility and stability of games and various programs. Over time, a small amount of RAM leads to the fact that we need to change or add additional modules.

But what to do if the computer does not see the RAM?

Such problems happen with both the main and added boards. In fact, there can be a huge number of reasons for this, and we’ll talk about them today.

RAM and operating system

It is important to know that in terms of bit depth, operational Windows systems are divided into two main types.

As a rule, most of our computers are installed with 32-bit Windows OS.

This is the first reason why the computer does not see RAM. Please note that software This type is designed to work with RAM with a total capacity of about 4 GB. The OS simply does not notice the rest of the memory, regardless of how many modules are installed on the PC and what their total volume is.

The solution to this problem is to install a 64-bit Windows versions, if the PC processor can work with it (which most modern chips can do).

You can get information about the OS version in two main ways:

If you have a 64-bit OS installed, but the computer still does not see the RAM, then the reason lies in another plane.

Limiting the amount of RAM by the operating system

When developing the Windows operating systems, Microsoft provided some limits on the RAM that could be used by a particular OS. Let's look at the values ​​using an example different versions Windows 7. Let’s immediately make a reservation that 64-bit versions are being considered (with the exception of “Win ​​7 Starter,” where there is none).

• Initial – 2 GB;
• Home Basic – 8 GB;
• Home extended – 16 GB;
• Professional – 192 GB;
• Corporate – 192 GB;
• Maximum – 192 GB;

A similar picture is observed in Win 8, although the thresholds there are much higher.

• Basic – 128 GB;
• Corporate – 512 GB;
• Professional – 512 GB.

Such limitations are quite normal, since cheaper versions of software always have more modest potential.

Therefore, if your computer does not see RAM, be sure to check the version of your OS.

Memory consumption for components

Almost every computer part requires a certain amount of RAM to run. correct operation. In particular, it is always used by the integrated video card, unless the PC uses a discrete alternative. And there are a lot of such components of a PC, each of which takes at least a small piece of RAM.

You can check this guess through the “System” menu in the control panel.

It specifies two RAM values:

1. Total (first digit);
2. Available (number in brackets).

In this case, calculating RAM consumption will not be the slightest difficulty. A simple mathematical operation that subtracts the available value from the total. The difference between them is actual consumption internal devices PC and system.

Volume limitation by motherboard

Not only the operating system can limit the amount of RAM, but also one of the components from which users least expect such a trick - the motherboard. It can have up to six slots for installing boards, but there is no guarantee that they will all work at once.

In this case, the same principle applies as the OS. The functionality of cheaper components is limited for the sale of expensive products.

If your computer does not see the RAM, but the software can work with the installed amount, you need to go into the motherboard BIOS and see if there is a limitation. As a rule, you can see information about the available amount of RAM immediately after entering this menu.

If the BIOS displays the installed amount of RAM, but the OS still does not see it, then the problem lies somewhere in the software plane.

Incorrect RAM installation

Despite the apparent ease of installation, the RAM module can also be installed incorrectly. If the amount of RAM is not displayed in either the OS or BIOS, then the problem lies directly in the board. In this case, you need to carefully disassemble the PC and check that the device is installed correctly.

The amount of RAM directly affects the speed of the computer. Therefore, many users try to install more and more more memory. It is not uncommon that after such manipulations it turns out that the computer or Windows does not see all the RAM.

In this article we will talk about why this situation may arise and what can be done. The article will be relevant for everyone modern versions Windows, including Windows XP, Windows 7, Windows 8 and Windows 10

Reason No. 1. 32-bit operating system.

If your computer does not see all the RAM, then the first thing to do is check the bitness of the Windows operating system. To do this, press the key combination Windows+Pause/Break and in the window that opens, pay attention to the “System type” item.

If it says you have a 64-bit operating system, then everything is fine. If the bit size is 32, then you need to reinstall the system and install the 64-bit version of Windows. Otherwise, this problem cannot be solved.

Reason #2: Limitations depending on the version of Windows.

Also, the computer may not see all the RAM due to limitations in some versions of Windows. In order to find out what version of Windows you have, you need to use the key combination again Windows+Pause/Break and look at the Windows edition name.

If it turns out that your version of Windows has RAM limitations, then you will need to reinstall the system using a more advanced version.

Reason #3: Integrated graphics.

As a result, the “System Configuration” window should open. Here you need to go to the “Download” tab and click on the “Advanced options” button there.

After which everything open windows you need to close by clicking on the “Ok” button and restart the computer.

Reason No. 6. Faulty RAM.

If you have checked everything described above, but the computer still does not see all the RAM, then you should check how much RAM is available in the BIOS. To do this, restart your computer and . If the BIOS also does not show all the RAM, this may indicate that one or more memory sticks have failed.

In order to identify faulty memory sticks, you can install them one at a time and try to turn on the computer. If the computer refuses to start with one of the memory sticks, then most likely this is the faulty memory stick you are looking for.

Installation additional modules random access memory (RAM) - the simplest and affordable way improve computer performance. When the PC is running, every running process uses a certain amount of RAM. The module is a temporary data storage that ensures system performance. The larger the amount of RAM, the faster system copes with the assigned tasks. Problems in this unit rarely occur. If Windows does not detect new hardware after installation, there are a few things you need to pay attention to: important parameters systems.

What should you do before buying RAM?

Before you go to the store, you need to check how much memory the installed operating system supports, regardless of the version: Windows XP, 7, 8, 8.1 or 10. The maximum amount of RAM supported by 32-bit Windows is 4 GB. To use more memory, you must install a 64-bit system.

IN modern computers use the new memory standard DDR4, in older versions - DDR3. Check exactly what type of RAM is in your PC so you don't make a mistake with your purchase. The DDR4 module will not physically fit into the DDR3 slot, because the recess is on the side with the contacts different types memory is different.

The computer does not recognize the new RAM

You bought desired type RAM, you have a suitable operating system, but the computer does not see installed memory? First of all, check whether the module is inserted correctly into the slot. To do this, turn off the computer, remove the RAM stick and wipe the contacts. Use a hard eraser or microfiber cloth soaked in alcohol. Now insert the strip with the desired side into the slot. Make sure that the module is firmly seated in the socket: you will hear a slight click when the part snaps into place.

If, after checking that the installation is correct, the RAM is still not detected by the computer, you need to exclude possible reasons:

• errors in software configuration;
• problems with RAM;
• motherboard malfunction or incompatibility.

The easiest way to start is by checking the computer configuration, and then making sure the parts are working properly and compatible.

How to check system settings?

By default, any operating system has certain limitations on the amount of supported memory, depending on the bit depth and version of Windows: “Elementary”, “Home Basic”, “Professional” and so on. If the amount of RAM matches that supported by the system, but the module does not work, try checking one more parameter:

1. press Win + R keys;
2. in the window that opens, enter “msconfig” (without quotes!);
3. click "Ok";
4. The “System Configuration” window will appear, go to the “Download” tab;
5. go to “Advanced settings” and check if there is a limit in the “Maximum memory” parameter;
6. If the checkbox is checked, uncheck it.

The system does not set such a restriction; it could have been previously assigned manually. Having ruled out the possibility of system malfunctions, it is worth rechecking the functionality of the PC components.

How can you tell if your RAM is working?

In a situation where you add an additional strip, but the computer does not see it, try removing the old module and starting the computer only with the new part. If the PC does not turn on at all, then the RAM is not working, and you will have to go to the store for a replacement.

If the computer turns on, but the motherboard supplies more than one sound signal, after startup, the computer reboots or freezes - this also means problems with the new RAM.

If the computer works with one bracket, but not with two, it is worth eliminating the possibility of incompatibility of the two modules. For the system to work fully, when installing the second memory module, the operating parameters of the parts must match:

• clock frequency (from 800 to 3333 MHz);
• timing indicators;
• sometimes capacity (two 4 GB sticks are installed, two 8 GB sticks, etc.).

All information about the equipment is indicated on the module, but you can check the parameters with special software, for example, MemTest86+. You can download the utility on the official website http://www.memtest.org, where there is a trial and full version programs. The program does not determine compatibility, but shows errors in RAM and its main characteristics. If a discrepancy between one module and another in terms of frequency or another parameter is detected, you will have to replace the RAM with another copy.

Possible problems with the motherboard

It happens that one of the slots on the motherboard reserved for RAM fails. This occurs due to mechanical damage. In most cases, the part cannot be repaired - it will need to be replaced.

Check if the motherboard sees new module, you can in the BIOS. In most cases, information about installed equipment. If in BIOS data There are no RAM sticks, the slot is probably faulty. You can try updating the BIOS or resetting the settings - to official resource boards can always be found detailed instructions how to do it correctly.

If the motherboard has four memory slots, they are usually made in two colors. If you previously used one slot, the second module must be inserted into a connector of the same color. Other connectors only work when the third and fourth memory modules are connected. All details can be found in the instructions for the motherboard.

One of the proposed solutions will help resolve problems with RAM or, at a minimum, find out the cause of the problem.

All personal computer users are trying to increase their RAM. If you are going to install an additional stick, then this may interfere with your plans, since the computer may simply not see it. So why is not all the RAM available in different versions Windows?
The computer will not see RAM for several reasons. The size of the system can play a big role. A computer with a 32-bit operating system will not see more than 3 GB of RAM, because that is how it is designed. To solve this problem you need to install a 64-bit operating system.
A situation may arise that the system actually shows the amount of RAM that it should have, but it is available in smaller amounts of memory. This is explained by the fact that the memory is reserved for the built-in video card, but if there is a discrete one, such a problem will not be detected. But it’s still worth making sure of this and checking in the BIOS whether it is enabled or not and how much memory it has at the moment uses.
Also, if you select an option such as “Maximum memory”, you will not be able to take full advantage of it. You can check this using the system configuration.

Possible problems

If this parameter is not found, you should update the BIOS. There is also a possibility that this function was not implemented during the production of the motherboard. In this case the best option will replace old version to a newer one that will support unlocking RAM to use more than 4 GB.

Outdated hardware can also be a hindrance. Older generation motherboards may not see more than 4 GB. To do this, you need to look at the characteristics of the motherboard itself and find out about the maximum amount of memory that it can support.

It is also possible that if the stick is new, you can try installing RAM in different slots, this may solve the problem. Maybe rearranging it will help the system see them.
If these methods did not help solve the problem, then consider the following options that may help you.
Incorrect BIOS setup This could also be to blame.

Enable memory reallocation

Check your BIOS to see if memory reallocation is enabled in its settings. If you redistribute the memory, then its huge amount can become available to Windows. The one who supplies the equipment decides what to call the function that will be responsible for memory redistribution. It may have names such as memory expansion, memory reallocation, or other similar names. But also exclude the fact that such a function as memory redistribution may not be available on the computer.

Resize AGP video hardware using BIOS settings

You need to find out about the allocated memory specifically for AGP video equipment. The system shares this memory with the video adapter, which is used to display textures and renderings. BIOS Settings will help you adjust the size of your video equipment. Its size is usually 32,64,128 or is set automatically. Then you should restart the computer and check the amount of RAM.