Questions tagged [memory]

RAM (random access memory), either RAM hardware or software and operating system use of RAM.

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89
votes
9answers
32k views

Why does Windows only show about 3.5 GB of my 4 GB of RAM?

I recently upgraded my computer's RAM to 4 GB. My 32-bit Windows installation shows only 3574 MB of the memory. How can I make Windows use the full amount of RAM?
57
votes
10answers
205k views

How can I tell what RAM will fit my computer?

If I want to add more RAM to my computer, how can I buy something compatible? What kinds are there? How do I determine which kind my computer will accept and how much I can add?
83
votes
4answers
134k views

Windows 10, 'System' process taking massive amounts of RAM

Since I upgraded to Windows 10, my system has been consuming RAM excessively I've been reading a bit and determined it's likely a driver leaking memory. So I got myself the Windows Driver Kit and ...
79
votes
3answers
263k views

Windows 10 high memory usage (unknown reason)

A few days ago I updated my PC to Windows 10. However, after some use my PC started to slow down until it was impossible to use – it was due to high memory usage. After a restart, everything came back ...
73
votes
4answers
127k views

Windows using too much RAM, how to diagnose resource hog

I have 16GB of system RAM. On startup with no applications open except the task-manager Windows is using about 3gb of RAM. I looked in the processes tab, but nothing seems to be out of the ordinary. ...
26
votes
8answers
264k views

Why is all my extra RAM marked as “hardware reserved” in Windows 7?

I have a new HP Z800 Workstation, running Windows 7 Enterprise 64 bit. Z800 Specs are here. The machine has 4GB of RAM -- windows reported 1.99GB available, 2GB was "hardware reserved". I added ...
22
votes
9answers
68k views

Is there way to enable more than 4 GB RAM in 32-bit Windows OS?

I upgraded my PC to 4 GB RAM and I get only 3 GB. Windows 7 32-Bit consider that I've 4 GB RAM but didn't use more than 3 GB. Someone told me that MS Windows 32-bit doesn't support RAM larger than 3 ...
24
votes
1answer
17k views

Windows says RAM ran out while there is still 4 GB of physical memory available

This System Information is from Process Explorer. There is still physical memory available but the system shows nearly no RAM left. Task Manager also shows that about 74% of total RAM is used. Since ...
37
votes
9answers
170k views

How can I enable PAE on Windows 7 (32-bit) to support more than 3.5 GB of RAM?

I know that Windows XP 32-bit can be configured, through PAE, to support more than 3.5 GB of RAM. Is there a good tutorial to do this with Windows 7 32-bit? As to why I don't simply use 64-bit ...
8
votes
5answers
15k views

How to enable 4GB in my Windows 7 64 bit?

I have the following machine configuration: Intel Core 2 Duo E6300 1 x 2048 MBytes memory chip 2 x 1024 MBytes memory chip 1 x Radeon HD 4870 Motherboard : Gigabyte 945P-S3 Windows 7 RTM 64-bit In ...
36
votes
8answers
25k views

Is there any benefit from installing Windows 7 64-bit when you have less than 4GB of RAM?

I've recently purchased Windows 7 Ultimate. I have an AMD Athlon64 X2 5000+ with 2GB DDR2 RAM. I know RAM has gotten much cheaper, I know, I know, but I am not going to be able to upgrade my RAM for ...
6
votes
2answers
14k views

4 GB of RAM installed but only 2.97 GB usable. What gives? [duplicate]

Possible Duplicate: Where did the other .8 GB of RAM go? I just bought a used MacBook on eBay that came installed with 4 GB of RAM. The first thing I did was installing Windows 7 using Boot ...
13
votes
8answers
18k views

Why is usable RAM less than total RAM?

My girlfriend bought a laptop last week. It's a core 2 duo with 4 GB We installed vista 64bit, and one of the first things we did was right click on "My computer" to see gthe properties. Immediately ...
16
votes
6answers
60k views

How does Motherboard and CPU affect RAM choice?

I am seeking advice on which memory to use with my motherboard and CPU. Below are my components and some relevant information extracted from their official websites. NOTE: Although this is a very ...
3
votes
7answers
3k views

Where did the other .8 GB of RAM go? [duplicate]

Possible Duplicate: Why does Windows only show about 3.5 GB of my more than 4 GB of RAM? I have this system, which has 2 times 2 GB SDRAM installed. When I check the system BIOS it shows as 4 ...
50
votes
3answers
118k views

Is it faster to have four times 2 GB or two times 4 GB of RAM with a dual-channel mainboard?

I'm building a Core i7-860 system which supports dual-channel memory (up to 16 GB in four DIMMs), my target is 8 GB. From the performance perspective, is it better to have two times 4 ...
97
votes
12answers
86k views

Should I disable swap file if I have lots of RAM or should I move it to a virtual RAM drive?

Imagine I have tons of RAM. Let's say 64GB. That's a lot for even gaming PCs. Now the default location of a pagefile in Windows is on the main OS drive, be it HDD or SSD, which are faster in general, ...
37
votes
1answer
146k views

What happens if I use RAM of a faster speed than the CPU supports?

Looking at the Intel E3-1230v2 CPU, under Memory types it says "DDR3-1333/1600". My question is, in what way does the CPU limit the RAM speed? What would happen if I put in a DDR3-2133 RAM chip ...
30
votes
6answers
155k views

Is it safe to use RAM sticks with different frequencies?

I have two RAM sticks: one 533 MHz and one 667 MHz. Is it safe to use both of these in the same system?
12
votes
5answers
9k views

What exactly is the cause of RAM incompatibility?

I'm looking at rather short QVL lists from manufacturers, and I'm wondering what is the underlying cause of RAM incompatibility aside from the obvious: Obvious Reasons for Incompatibility RAM ...
49
votes
5answers
7k views

How to Determine which Firefox Add-ons are Using the Most Memory

I love Firefox for its add-ons. I have a lot of them installed, which obviously increases memory use. But it seems that some add-ons are better than others in that department. Does anyone know a way ...
63
votes
5answers
272k views

How do I find what's eating up all of my system's memory? (not SuperFetch)

How does one diagnose/discover memory-related problems, if Task Manager appears to not be reporting correctly? I must have a memory leak or something -- I'm at 75% usage of my 12 GB of memory, but ...
25
votes
9answers
36k views

Running Windows with defective RAM

Is it possible to run Windows (7, x64) with a defective RAM module? More precisely, is there some way to tell Windows not to allocate a known bad address or block of addresses? For Linux, there is ...
35
votes
3answers
32k views

What limits a motherboard from supporting more memory?

My specific question is with the ASUS M3N78-VM motherboard that my home server uses. I currently have 4x2GB installed for a total of 8GB but I was hoping to upgrade to say 16GB (4x4GB). The official ...
9
votes
7answers
43k views

Will adding more RAM speed up my computer?

Apparently, you can speed up your computer by adding more RAM. Is the amount of ram to be added is directly or indirectly related to the amount of hard-disk space, processor speed, Motherboard etc... ...
12
votes
9answers
30k views

How to Check RAM Size without Looking at Motherboard

As far as I am aware, one can view the RAM Size in System Properties: From the above screenshot it seems that My RAM is 3.5 GB, but as far as I can tell I actually inserted 2 two GB RAM into my ...
98
votes
4answers
98k views

Can a 32-bit OS machine use up all 8GB RAM + 20GB page file?

What I understand about 32-bit OS is, the address is expressed in 32 bits, so at most the OS could use 232 = 4G memory space -- I assume the unit is bytes, so 4GB. Does this mean if any machine with ...
60
votes
10answers
249k views

Windows 8.1 Update 1 Disk Usage 100%

Background Information / Computer Specs I have a 14-inch Samsung Series 5 Ultra. Core i5 CPU, 750GB HDD, 8GB RAM, Intel HD Graphics 4000. I've had the computer for about 1.5 years with no major ...
4
votes
1answer
6k views

How does memory/commit charge work in Windows 10?

This question is prompted by the following regularly observed phenomena I'd like to find an explanation for: Current commit is regularly higher than Physical usage + Pagefile size. What's up with ...
7
votes
3answers
6k views

svchost eating up memory

I'm running Windows 7. It seems that svchost is eating up a lot of memory. The user name for the particular svchost instance is "Network Service". The description is "Host Process for Windows ...
16
votes
5answers
22k views

Unreasonable RAM usage in Windows 7

I have a fresh install of Windows 7, and my RAM in normal startup goes up to 2.5GB. I looked at Task Manager, and there's at least 1.5GB missing from there and in Resource Monitor as well. There's no ...
4
votes
1answer
3k views

Why are the failing addresses in Memtest86+ higher than my total memory?

Context Feel free to skip this section. I ramble a bit. This is a desktop computer. My motherboard is a MSI P67A-C45. The two memory modules are 4GB DDR3-1333 in DIMM 1 and DIMM 3, dual channel. A ...
23
votes
7answers
6k views

Is it possible to use a storage disk (such as a USB drive) as RAM?

My motherboard (HP Pavilion s3000y) only supports 2GB of RAM max. Which means that I can only allocate 1GB for running VMs, and applications that use a lot of RAM are slow (such as games and Visual ...
32
votes
6answers
119k views

How much memory can a 64bit machine address at a time?

If the memory is byte addressable, shouldn't it be 2^64 / (2^10 * 2^10 * 2^10) = 2^34 GB ? A general Google search says 8GB or 16GB max. How is that true? Also, how does it depend on the Operating ...
10
votes
2answers
51k views

How to find source of memory leak in Windows 7?

I've got a Windows 7 machine that keeps running low in RAM. I can see the free RAM going down over a few hours until the point the machine becomes unresponsive. I've checked the process list and none ...
25
votes
3answers
43k views

Commit charge is 100% full but physical memory is just 60% when using no page file

I have disabled the page file in my system (hard disk is too slow, cannot buy a new one right away, cannot move page file to another partition). When I see into Resource Monitor, using memory ...
35
votes
15answers
24k views

Any reason not to disable the Windows pagefile given enough physical RAM?

The question of disabling the Windows pagefile has already been discussed quite a bit, for example here and here and here. People continue to upvote answers that say "you should not disable your ...
14
votes
4answers
124k views

Installed memory 4GB but only 1.93 GB is usable shows in system properties dialog?

In my Intel Core i5 2.80 GHz CPU , DH55HC series Intel mother board machine installed with windows 7 64 bit machine, when I right click my computer and see system properties I see that "Installed ...
10
votes
3answers
29k views

8.00GB RAM (3.22GB usable) in Windows 7 x64

I have set up Windows 7 Ultimate 64-bit on my PC. I have 8GB RAM and my BIOS states the correct amount (8192MB), but Windows (System Manager) says I have 8.00GB (3.22GB usable). give me a solution. I'...
5
votes
1answer
61k views

Can I use 1333 MHz and 1600 MHz RAM together?

I currently have 2x1GG 1333MHz DDR3 strips. I plan to purchase a further 2x4GG 1600Mhz strips. Will I be able to use both sets of RAM in my PC together? Will they both be limited to 1333Mhz? Old RAM: ...
2
votes
2answers
4k views

64-bit Windows 7 can only use 3.25GB of RAM instead of 4GB? [duplicate]

Possible Duplicate: How to enable 4GB in my Windows 7 64 bit? My Windows 7 is 64-bit, and I thought that means it can use the full 4GB of RAM installed on the computer. But I just saw this on my ...
74
votes
7answers
487k views

How to find the RAM type in command prompt?

How to find the RAM type (DDR2/DDR3) of the system using command prompt? I have tried SYSTEMINFO in command prompt but it did not display the RAM type.
40
votes
1answer
105k views

How can I test my GPU memory/RAM?

I run MemTest86 a lot at work on customer's machines, and it's great for troubleshooting memory issues. My question is, how can I test that a GPU is starting to go? I know of programs like 3DMark to ...
24
votes
2answers
110k views

Why is my “Committed” memory so much higher than my actual RAM space?

I have run two virus scans and neither of them have found anything so far (Malware Bytes and Avira Rescue). During gaming I will get Windows popups saying that my system is low of memory and ...
45
votes
14answers
102k views

What happens when more RAM is installed than the motherboard supports?

I have a free RAM slot and some spare memory that will fit my computer. However the problem is my motherboard only supports 2GB and I have 2GB installed. What would happen if I plugged the spare ...
14
votes
3answers
94k views

How to analyze a memory dump on Windows after a blue screen error?

My computer running Windows 7 x64 crushes time to time. Could you please advise how to analyze the memory dump or point out possible cause and further troubleshooting steps? The computer has ...
13
votes
3answers
31k views

Can you tell DDR and DDR2 apart visually?

I'm getting a few old computers to take apart for parts soon. Most of them are definitely using DDR2 RAM, but there is the possibility that one or two of them are using DDR RAM. Since these are ...
8
votes
2answers
26k views

Is a DDR3 MB compatible with DDR2 RAM?

If a motherboard's specifications say it supports DDR3 SDRAM sticks, would I be correct to assume it is also compatible with DDR2 RAM? Am I wrong, or does it depend on the motherboard?
3
votes
2answers
4k views

Can I mix different RAM modules in PC?

I have 4 RAM slots on the motherboard P5K. At the moment I have two 1GB RAM modules and two 2GB RAM modules. Everything is working fine. Can I buy one 4GB module and put it instead of the 1GB module?...
368
votes
19answers
214k views

If 32-bit machines can only handle numbers up to 2^32, why can I write 1000000000000 (trillion) without my machine crashing?

32-bit computers can only store signed integers up to 231 - 1. This is why we have run out of IPv4 addresses and have entered the 64-bit era. However, the number 231 - 1 (2,147,483,647) is not as ...