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

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1answer
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How can I test my GPU memory/RAM? [duplicate]

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 ...
25
votes
8answers
24k views

Why half of my RAM of 8GB is missing?

Have been sitting with 8GBs of RAM for 2 years still thinking I needed another 4GBs and never questioning why so often I get message about low physical memory that would close all open programs ...
25
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3answers
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CPU-Z says my PC3-10600 1333MHz RAM is actually PC3-10700 667MHz. Do I have 1333 or 667 MHz RAM?

CPU-Z says this: DDR3 4096 MBytes PC3-10700 (667 MHz) I am supposed to have PC3-10600 1333MHz. What am I not understanding? Or, is my RAM only half of what the label and seller claims it to be? ...
25
votes
3answers
14k 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 ...
25
votes
2answers
54k views

1.35 V RAM in a 1.5 V system - Will it fry or overclock?

The general question is: When installing low voltage RAM in a board that outputs a higher voltage to the memory module, will this fry the RAM or will it be like overclocking it? My specific case is: ...
25
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2answers
40k views

What is /dev/mem?

Presumably it's somehow related to memory? What would sudo cat /dev/urandom > /dev/mem do? Trash all RAM? All non-kernel virtual memory? None of the above?
25
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3answers
7k views

How to findout which firefox tab is using most CPU or memory? [duplicate]

There are times when the firefox responds reluctantly. And it is not only when i have opened many tabs. But there are cases when i have opened as many as 20 tabs and firefox is working fine and there ...
24
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2answers
59k views

How do I detect my computer's RAM configuration?

My Dell Inspiron PC running Windows 7 reports that it has 2GB of RAM installed. Is there any way I can detect how this memory is distributed short of opening the side of the machine and taking a look? ...
24
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2answers
3k views

Does memory get slower if we increase the size?

I mean if we increase the size of a sdram with same technology does the response time get slower? If it does, is it about complexity of digital logic?
23
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9answers
123k views

Why/how is svchost.exe using 6.5GB of memory?

What is going on here? I have almost nothing running. By almost nothing, I mean Firefox, and some background network applications that are entirely passive and would never use this much memory. ...
23
votes
1answer
3k views

Resuming Windows 7 from Hibernate after a RAM change?

I ordered a pair of new DDR3 RAMs, I will install them to the empty RAM slots once they arrive. What would happen if I hibernate my PC, then install the new RAMs, and then wake it up from ...
23
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4answers
4k views

How to tame Linux responsiveness, memory, and paging

First question on overflow =)... +100 bounty. Couldn't think of something I really cared about until now: I'm really fed up with the state of Linux desktop responsiveness, e.g. ...
23
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4answers
2k views

How can virtual machines consume so little RAM on the physical host machine?

I'm running VirtualBox on a Windows XP machine with 2GB RAM. I've created a virtual Ubuntu machine and allocated it a base memory of 750MB. Just to put it to a test, I ran 20 things at once on the ...
22
votes
4answers
4k views

Can I use two types of DDR3 in the same motherboard?

I have a DDR3 RAM of 1333MHz of 4GB on my motherboard (Asus H61M). I have another stick of RAM DDR3 1600 MHz of 4GB. Can I use this in the other slot along with the original to reach a combined 8GB? ...
22
votes
1answer
3k views

Windows 7 RAM says only 16 GB of 24 GB of RAM is available

I have Windows 7 on a gaming PC. I have an Asus Rampage Formula 3 motherboard with 24 GB of RAM. When I go to system properties, it shows that I have 24 GB of RAM, but it says in parenthesis ...
22
votes
7answers
4k 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 ...
22
votes
3answers
8k views

Which have better performance Two 2GB RAM sticks or One 4GB RAM stick? [closed]

I am planning to buy a new PC. The mainboard has 4 memory slots, The PC has Windows 7 64-bit installed. Which approach is better regarding the performance buying: Two memory sticks of 2GB? One ...
22
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3answers
2k views

Greasy water in laptop's DIMM slot

My wife was having dinner in front of (on top of) the laptop and she spilled some soup onto it, right above the touchpad. Almost all of the soup ended up in the upper DIMM slot which sits underneath ...
22
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3answers
16k views

Why PCs need much more RAM than video game consoles to run the same games? [closed]

It seems strange to me that every 7th generation console has much less memory than contemporary PCs, but games on consoles still run pretty smooth today. For example: PS3 has 256 MB memory for system ...
22
votes
1answer
27k views

Disable compressed memory in Mac OS 10.9 Mavericks?

Is there any way to disable memory compression in Mavericks? Ever since I upgraded, my Minecraft server has been using ludicrous amounts of CPU time and choking. I'd like to test without compressed ...
22
votes
4answers
34k views

Why is dwm.exe using so much memory?

I've scoured the web, but I'm sick of reading "scan your computer for viruses" and "upgrade your RAM" on answers to similar questions to this. I understand that dwm.exe is for (simply put) caching ...
21
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9answers
60k 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 ...
21
votes
4answers
5k views

Why does Linux use a swap partition when the kernel supports paging/virtual memory anyway?

As far as I understand paging and swapping, they're completely different concepts. While swapping means, that a process is either completely in physical memory or on the hard drive, with paging parts ...
21
votes
4answers
3k views

Is there a certain or measurable advantage to using ECC RAM in a desktop PC?

I fuss a lot over building stable machines -- in that I absolutely hate crashes, reboots, funny behaviour, etc. -- and so error-correcting a.k.a. ECC RAM would seem to solve a big problem: memory ...
21
votes
1answer
37k 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 ...
20
votes
7answers
2k views

What to do with a ton of extra memory?

I have 8gigs of RAM in this machine. I never really use more than say 4gigs (includes my virtual machines I use for dev testing). What can I do with this extra space to best improve system ...
20
votes
4answers
4k views

RAM tests inconsistently - what is the most likely culprit? (i.e. what should I spend money on replacing)

Motherboard: GA-B85M-DS3H-A CPU: Core i5 4430 RAM: PNY XLR8 DDR3 32GB (4x8GB) 1600MHz (MD32768K4D3-1600-X9) PSU: EVGA 500 W1 80+ The Problem With all 32GB of RAM installed, the system fails ...
20
votes
6answers
10k views

Why is chkdsk using 90% of my RAM?

When I built my new computer, I gave my old one to my parents who were in dire need of an upgrade, after cleaning everything out of it, of course, leaving just the OS and a few programs. It worked ...
20
votes
6answers
15k views

Wipe RAM on shut down to prevent Cold Boot Attack

My system is encrypted using Full Disk Encryption, i.e. everything except /boot is encrypted using dmcrypt/luks. I am concerned about Cold Boot Attacks, where researchers demonstrated, that content ...
20
votes
3answers
14k views

What's using my swap (Ubuntu)?

I have an Ubuntu 8.04 server which is running a database and a bunch of Java application servers. Its memory configuration and usage is: total used free shared buffers ...
19
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7answers
81k views

How can I detect the amount of memory slots I have?

I know that there used to be a Corsair memory detection tool, but I can no longer find it. I didn't find anything when searching Google. I would like to scan my machine to know a few things: How ...
19
votes
2answers
9k views

Can I add RAM sticks from an old PC to improve the performance of the new one?

After 6 good years, I think my old Vostro 410 died on me the other day (RIP). The PC won't turn on so the motherboard appears to be dead. I'm thinking of replacing it with a Lenovo M83 Pro small-form. ...
19
votes
6answers
86k views

16GB Ram - Force Windows 7 to use as much RAM as possible?

I was wondering if there is any way to configure Windows to consume MORE ram. I have a desktop PC with 16 GB of ram and only 2 is used on a normal workload. The maximum which i witnessed till now is ...
19
votes
5answers
19k views

Does installing larger RAM means consuming more energy?

Since every bit of a dynamic memory module needs to be refreshed to keep it's data, does that mean that if I install a module with more capacity than the current one on my laptop, more energy will be ...
19
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6answers
9k views

Does more RAM usage cause more battery usage?

I'm using a 2 year old 15" AMD laptop running Windows 8, and its battery life is not as long as the brand new ultrabooks for sure. In the place I'm currently working I don't have access to a power ...
19
votes
7answers
66k 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?
19
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3answers
48k views

How do I dump physical memory in Linux?

How would one create a dump of the physical memory (RAM) in Linux? What software if any is available for this purpose? I have read that one should not write to a local disk but rather send the data ...
19
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2answers
12k views

RamMap “Empty standby list” drastically speeds up PC. Is there a better way to do this?

Many people are educated on how Windows Memory manager caching work by reading Microsoft white papers, etc. However, there are relatively few documents that describe real-world performance issues ...
18
votes
3answers
40k views

What do motherboard RAM slot colors mean?

I have always seen that the motherboard RAM slots are colored in pairs, but never knew what it meant. I just put the 2 RAM in, and after a few tries it always worked. But after I tried to install a ...
18
votes
5answers
22k views

Why are RAM module capacities in powers of two (512 MiB, 1, 2, 4, 8 GiB)?

Newer computers usually have 2, 4, 8, etc. GiB of RAM. The older ones usually have 128, 256, 512 MiB or less but also in powers of two. What is the reason behind this? Why don't hard disks and DVD ...
18
votes
2answers
19k views

How can I determine which RAM module is failing Memtest86?

One or many of the memory cards out of total 4GB (4x1GB) are failing. The following is memtest progress screenshot. It is always pointing to memory at 19xx MB and 50xx MB. Error bits are always ...
18
votes
4answers
47k views

How to test video card memory

I want to test the memory of my video card because there are vertical lines on my screen. I have done some basic troubleshooting and it seems that the problem is in the video card. I want to validate ...
18
votes
3answers
52k views

How can I make my computer use more RAM?

I'm running Windows 7 64-bit with 8GB of RAM. The problem is, I very rarely use all of it. I do some video editing from time to time and it definitely comes in handy then, but for everyday use, I'm ...
18
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4answers
12k views

Invisible memory leak on Linux - Ubuntu Server (not disk cache/buffers!)

August 2015 Summary Please note, this is still happening. This is not related to linuxatemyram.com - the memory is not used for disk cache/buffers. This is what it looks like in NewRelic - the system ...
17
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8answers
134k 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 ...
17
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5answers
69k 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 ...
17
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3answers
17k 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 ...
16
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5answers
17k 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 ...
16
votes
7answers
11k views

Computer doesn't use more than 4 of my 8GB of RAM…? (64-bit computer)

Recently, to future-proof my computer, I've added on top of my original 4GB of memory. I brought the total memory to 8GB, and I've got no noticeable change in speed-- even when it should. I went to ...
16
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3answers
2k views

Getting a BSOD and wonder RAM sticks might be the cause? Is a memory test guarantee 100% assurance?

I’m using Windows 7 (64-bit) 16GB RAM (2x8GB RAM sticks). Yesterday I got a blue screen while using my computer (Chrome browsing mostly). For checking that it is not a memory problem - I ran ...