Installed 4GB memory available 2. RAM is available not all: how to use its full volume? How to make accessible all installed RAM

Familiar to many users. When calling the properties of the system, the full volume is displayed, but for some reason it is indicated that the memory is available slightly less. Even worse when the user knows exactly how many RAM has been installed, and 50 and less percent is available. Why this happens, and how to use the maximum RAM volume, then consider. But for a start, briefly focus on the basic reasons for such a phenomenon.

Why is not all operational memory available?

So what is operating windows systems Sometimes they give indicators, the values \u200b\u200bof which are obviously less than the full amount of fixed memory, may be associated with a number of reasons, among which are the most significant:

a 32-bit system has been installed, not supporting the memory of more than 4 GB;
maximum is not supported motherboard;
the parameters of the system establishes a limit to the maximum used volume of RAM;
in BIOS, the redistribution of memory is incorrectly set;
memory is partially reserved for embedded video adapters;
too many active processes are launched;
the installed strips have damage, their performance is broken, or they are incorrectly connected;
memory use is blocked by viruses.

Immediately it is worth saying that there will be no questions related to viral influence in detail. Here you can advise just just in case to check, using portable antiviruses or similar programs that have boosters at their disposal.

How to use all set memory simplest ways?

There are much more important issues when the RAM is not available all are available, there are problems with connecting memory planks or their incorrect work. First, make sure that motherboard Calculated on the volume being installed, as well as check the density of inserting the planks into the appropriate slots. We will not be able to perform a memory test, which can use your own windows (MDSCED) or third-party programs like MemTest86 / 86 +.

If malfunctions at this stage are not detected, pay attention to the discharge of the installed Windows modification. If there is a 32-bit version that does not know how to work with an RAM of more than 4 GB (unless to apply special means), no matter how much memory you have installed the memory, it does not recognize it anyway.

The optimal solution will be the installation of 64-bit windows version. But in this case, the programs installed earlier may not work, and important files will have to be copied to another logical section or on removable media.

Sometimes it also happens that the RAM is available not all because of the incorrectly displayed memory usage options in (msconfig).

In the Configurator on the Load tab, click the Advanced Settings button and check if the checkbox is set to the memory maximum point. If it is, remove it, save the installed options and restart the system.

As already understandable, partially memory can "eaten" with a huge number of active background processes and services that are not visible to the user. To start, disconnect all unnecessary components in the autoload (in Windows 7 and below for this, the corresponding tab in the configuration settings is used, in versions above - "Task Manager").

Just in case, look at the active components of the system in the program and components section and disconnect the unused (Hyper-V module, Internet Explorer.If you use another browser, print service, if there is no printer, etc.). Similarly, you can set a disconnected type of startup and for some other services (Services.msc), but in this case you need to know exactly what can be deactivated and what is not.

Available little RAM: What settings can be changed in the BIOS?

If the problem and after applying the solutions described above, go to the BIOS / UEFI primary system settings and check the memory settings in which the item containing the words Remapping or Remap (redistribution) must be present.

If you have 64-bit Windows installed, and more than 4 GB memory, set the DISABLED value for it. Otherwise, it needs to be activated.

If the RAM is not available all due to the reservation of the additional volume for the video card built into the motherboard, set the value to this item corresponding to the adapter memory (you can find it on the Monitor tab when calling the DirectX dialog - dxdiag). This is done by shifting automatic definition (AUTO) to one of the available options (32, 64 or 128 MB).

Patching 32-bit systems

Finally, it is possible to use all over the amount of volume in 4 GB in 32-bit systems using the READYFOR4GB utility for this. First, the executable EXE file from the application folder is started, and the Check and Apply buttons are pressed. After that, similar actions are performed for the NtkrNLPA.exe object. Then the addBootMenu.cmd file is started and the command execution is confirmed. After rebooting, if the menu appears with the bootloader, Windows is selected.

Note: All actions are made exclusively with the launch of the files on behalf of the administrator at your own risk, since the system performance after applying this method is not fully guaranteed.

People often ask the question: why out of four (six or eight) gigabytes of RAM, installed in the computer, is available only 2.23 (3.25 or 2.87, etc.)? Below are the possible causes of incomplete definition of RAM.

Why does the computer sees the part of the RAM

1. The 32-bit operating system is installed.

Any 32-bit OS will "see" not more than 4 GB of RAM. More often - from 3.15 to 3.5 GB. And here is not so important, XP is or "eight". This occurs due to the specifics of the distribution of the address space of the memory. Accordingly, in order not to get into this situation, you need Use the 64-bit Windows OS.

2. The computer uses an integrated video adapter

A part of the RAM for its needs can "cut off" an integrated (or "built-in") video card. Very often it is found in laptops. This situation is the norm. And if you are not enough for you the number of the remaining RAM, the Council is only one: increase its volume by adding or replacing modules.

It is also important to understand that:

different integrated video adapters are selected by different RAM;
the same video card can take a different amount of memory, depending on the RAM volume installed in the computer. Suppose when it was 2 GB RAM, the video card took 512MB. And when I installed 4GB - the graphics began to cut 1GB.
there are hybrid video adapters that have their own memory, but also capable of expanding it by borrowing memory from RAM.

Because of these two reasons, sometimes it is quite difficult to understand why it is just such a volume of RAM. It may turn out that out of the 6 mounted gigabytes 32-bit Windows "saw" 3.25 GB, and the video card "cut off" from this volume another 512MB. As a result, 6GB will be written in the system properties (2.73 available). The solution to such a combined problem will be again replacing the operating system on 64-bit and, if necessary, increasing RAM.

3. Limitations of OS publication on the maximum volume of RAM

Younger editions of Windows 7 and Vista have limitations to the use of RAM. For example, Windows 7 Starter works only with 2 GB RAM, home base X64- with 8GB, and home extended x64- with 16GB. Naturally, in this case, the output will only establish another edition of the operating system (for example, Pro.).

4. Part of the memory modules is defective or no contact

Turn off the computer. Disconnect the power cord from the stationary PC or remove the battery from the laptop. Press the power button several times to remove the capacitors charge.

Remove all memory modules, clean their contact with erasing rubber, then clean them with alcohol. Install the planks in place and check whether they are determined by the system. It is convenient to do in free cPU-Z program. Click the SPD tab. In the left side of the window there is a drop-down list that displays information about the installed RAM placters in each slot:

If, when you select a specific slot, empty fields are displayed, it means that it is either there is no module or it does not work.

5. Modules installed incorrectly

In some Motherboard models, part of the slots may not work until priority slots are busy. Therefore, such nuances should be clarified in the manual for the motherboard (on the site of the manufacturer or in the brochure).

6. The problem of compatibility of RAM modules

Check the operation of the planks individually using MemTest86 + ().

If each module itself works correctly (it is determined in the system, its volume is displayed correctly, there are no errors in tests), and when installing several together, one is not determined, then there is a problem of compatibility of the layers among themselves. To avoid this, try to install absolutely identical modules ().

conclusions

Once again about the most important. In order to operating system Used RAM to the maximum, it is recommended to install 64-bit Windows OS such editions as Professional. When it comes to modern OS (Windows 7, 8.1 and 10), there are no problems with the installation of a 64-bit version. And if you have a choice, feel free to choose this option.

But XP x86 and XP x64 are actually different systems with different versions kernel. And Windows XP 64 Bit Edition is considered rather unstable. Therefore, it is recommended that either install Windows 7 / 8.1 / 10 (if the computer is designed to work with one of them), or leave XP 32 bits.

The other day, my friend asked to help figure out his problem: Windows 7 on his notebook Samsung R525 reported that it sees 3 GB of installed memory, and only 764 megabytes are available. The laptop, a clear case, while worked slower than I would like. Check how much memory sees Windows, you can click on the right mouse button on My Computer and selecting the "Properties" item. The picture will be approximately the same (in the screenshot - what happened as a result of solving the problem):

The search on the phrases "Installed 3 GB is available 1 GB" and "Windows shows the memory is set more than available" showed that the problem is widely known, however, it may be caused by many reasons.

What was verified primarily:
2 DIMM PC-133 installed, one - 1 GB, the second - 2 GB of BIOS sees all of these 3 GB, the system also sees them;
From the permutation of the DIMM modules, it does not change anything;
Windows 7 we have 64-bit, so it should definitely see more than 3 GB of memory;
Windows 7 Home Basic supports up to 8 GB of memory, so that and due to the version of the system there should be no problem;
Resource Monitor Program (Press the Start button and in the "Find Programs and Files" row directly and write - the resource monitor ") * says that more than 2 GB are reserved for some devices;
In the program msconfig.exe, on the Download-\u003e tab, the "Maximum Memory" checkbox is additionally noted; So it should be - to use the maximum amount of memory, the checkbox must be removed.

The problem could be walking in the video card driver settings. The fact is that modern video cards are often either at all have their own memory, using systemic for its purposes, or have a minimum of memory on board, and for the output of a high-resolution picture or with a large number of colors, the system memory also use. BIOS laptop Allowed to "bite off" from the system memory no more than 512 MB, so that the reservation of an additional 1.5 GB could be written off to the driver.

In this samsung Models uses an integrated with the motherboard ATI Radeon 4250 video card. I had to download new Driver This video card, but and its installation did not help: in the driver of this video card there are no settings indicating how many system memory can "take off" driver. In principle, some video cards can share the memory with the system, marking it as reserved, and this understands the resource monitor, displaying such memory in the form of a gray strip. The display example is shown in the figure below, but for another system, just to understand how it looks like.

The system shared between the video card and the memory system can be used until it is needed by the video card, and as soon as the video card requests it, the system will be forced to free it. However, the volume of such shared memory, even if it is, is usually limited to no more than half an accessible memory, more often - less less.

Thus, our case came out of a row. Then an additional study was taken: instead of old memory modules in the laptop was inserted new module 4 GB sizes The amount of accessible memory increased to 2.75 GB. It has already been similar to the automatic "biting" of the memory of the video card (just about 1.25 GB and should have been reserved, a number of sources in the network spoke of the "half of the system memory of minus 512 GB used, which for 4 GB of system memory gave 1.5 GB).

The suspicion fell on one of the DIMM modules. And true: when trying to boot only with one old module in the size of 2 GB, the laptop refused to load. It turned out that the SPD chip on it, which informs the system configuration of the module, was alive, and the memory itself is faulty, and therefore Windows excluded from work.

After replacing a faulty module 2 GB to a new module 4 GB, the system returned to normal life, and the picture of the memory properties has become such as shown in the figure at the beginning of this article.

Hostess note: what Windows shows how " memory installed"Does not always reflect the amount of good memory. With a marked difference (more than 40%) between the installed and accessible memory, check the download settings using msconfig, and follow the serviceability of memory modules. In addition, it is better not to buy such video cards or such laptops with integrated video cards that are growingly consuming system memory.

Everyone may encounter the availability of all RAM. Onemost moment when you decide to add another or more RAM schedules to your computer, the following situation occurs. In the properties of the system it is written that 4GB is installed, and only 2GB is available. Or instead of 8GB available 4GB.

In this article we will tell you how to fix this problem and force Windows to use the entire RAM.

How to make accessible all installed RAM?

First of all, it is worth deciding with a pair of things. First -. If you have 32 (x86) discharge Windows, then more than 3.2 GB of RAM it will not see! The only option in this case is the installation of a 64 discharge OS.

Also, in the case of use, it will consume some amount of operational memory. Usually no more than 700MB. This is corrected only by installing a discrete (separately worth) video card with its video memory.

If you have 64 discharge Windows and a discrete video card, but not all of the RAM is available, then you need to do the following.

To start open system unit, remove all RAM modules and wipe the contacts to them with an alcohol napkin / simple eraser and install back, preferably changing the places. Many this helps.

One of possible causes - bad contact of RAM

The next step will be activation (enabled) functions in bIOS settings. Usually it is in Advanced -\u003e North Bridge Configuration.

Enabling MEMORY REMAP FEATURE ON BIOS

You also need to go to the system configurator by pressing the "Windows" + "R" button on the keyboard and screensing to the "MSCONFIG" command in the opened window.

Combination of the "Win" buttons + R "on the keyboard

Open the system configurator by the msconfig command

In the window that opens, go to the Download tab -\u003e "Advanced Parameters" tab.

If you decide to upgrade your computer by adding it a bit of RAM, it may happen that after installing it, the system will display the amount of memory that you have been set, but it will not be all and this is that 64-bit operating system.

Literally recently, with a similar situation and I had to face. In general, on the computer in which 2GB RAM was installed, it was necessary to add another bar with the same amount of memory.

As a result, after installation, the system saw all 4GB of RAM, but at the same time it was indicated that only 3GB was available. But, the most awesome was that Windows 7 x64 was installed on the computer, respectively, there should be no restrictions on RAM, as it usually happens on x32.

Having started to understand, I still found a solution over time, which helped me return the memory in place and I will gladly share it with you. Below in the article, I will show you that you can do if you have only 3 GB on Windows X64 instead of 4, 8 or 16 GB of RAM.

On the 64-bit system instead of 4 available only 3 GB of memory, what to do?

Of course, the first thing I thought that everything was in the system, it was possible that some kind of assembly curve was installed, but after reinstalling Windows With a licensed image, nothing has changed and memory as only 3 GB has been available.

Based on this, it can be assumed that the problem is in the gland or in the BIOS settings.

After hitting the BIOS, I began to search for any parameters in the settings, which at least somehow are associated with RAM.

Spending about 15 minutes to turn on and off different parameters, as well as test results, I still found what helped me.

This is a parameter called " Memory Remap Feature.", It is after I changed its value with" Disable " on the " Enable"In the properties of the system, the memory of the beginning is to be displayed normally, that is, all four gigabytes of RAM were now available.

How to find this option? Below I will show a visual example where I managed to find this feature. Of course I understand that today there are quite a few different motherboards, who appearance is different. But, while I will stop on my example, well, and then if possible, I will add something new. I can recommend to look for it in the settings of the chipset, most often it is there.

So reboot or turn on the computer and go beyond, I will remind you that the standard keys to enter the BIOS " Del. and F2.", If nothing is suitable for you.

Go to the tab " Advanced"And with the help of navigation shooters we descend to the section" ChipSet." or maybe " Chipset Configurations.».

The next step will be the transition to the section " North Bridge Configuration." By the way, many may not be this item, if so, nothing terrible, we skip this step and go further.

When you get to the right place, select the parameter " Memory Remap Feature.By pressing "Enter", set the value " Enable».

After, confirm the selected value and reboot the computer while saving all the changes made by pressing the F10 key.

If earlier on the 64 bit system, you have only 3 GB of RAM instead of 4, then it should now change and after loading the computer in the properties of the system, it will be shown that all 4 (or more) gigs are used.

At least, it helped me, so the Council is checked in practice and precisely for this I recommend to use it first.

What else can you take if only three gigabytes of memory are available instead of four

With the "Memory Remap" function, everything is clear, but what to do those who will not be it. Yes, maybe such that you will not find this item, especially it concerns the owners of laptops.

The fact is that this function can be sewn into the BIOS, even if there is no such parameter there. In such cases, of course, it is recommended for the latest version. And only after that "Memory Remap" will begin to perform its functions.

Also in the bios you can search the parameter " Memory Hole."Its value must be set to" Disabled.».

HPET MODE.another parameter that is recommended to check and set it the value " 64-bit.».

Open through the window " Perform».

Move into the tab ""And click on" ".

And then we remove the checkbox from the "" parameter.

Apply new settings and reboot the computer.

Also, some RAM can use and built-in video. For example, if your monitor cable is connected next to USB portsSo you use the built-in video, therefore for its full work from the total number of RAM, a certain part is taken and transmitted graphic processorAnd that is why instead of 4 GB you can see that the memory is accessible slightly less, for example, 3.5 GB. Here you have to measure or acquire a discrete video card.

There is also information that even when separately installed video cardThe processor continues to take the RAM for the needs of the integrated video. In this case, you need to change the value of processor graphs to the minimum or completely disable it, putting a value for integrated graphics in the BIOS Disable (PCI or AUTO.). After rebooting, the entire missing memory must be returned to the place and appear in full.

Well, of course, there is a possibility that instead of the established amount of memory you see much less due to the fact that your motherboard simply does not support, for example, more than 3 or 4 GB, but, usually, it is common for pretty old motherboards .

As you understood the causes of the display of 4 GB of memory instead of 3 GB, there can be a lot and each can be different. In this manual, I showed you what really helped me and what else can I try to exit this situation. If anything, I'm always waiting for your comments, and we will look together the answer to your question.

On Windows 7 x64, instead of 4 GB of RAM is available only 3 GB, how to return the memory?