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

learn more… | top users | synonyms (1)

7
votes
1answer
4k views

What happens when a computer runs out of RAM?

A little ago, out of curiosity, I wrote a Java program that takes up a lot of memory very fast. (It adds BufferedImages to an arraylist in a loop.) I kept the Windows System Monitor open to observe ...
7
votes
3answers
977 views

Why are apps so slow initially when switch to them, even though I have free RAM?

On my Windows 7 (64-bit) PC, when I have a few resource hungry programs going, and half a dozen others, when I switch to an app that I haven't used for a while, it takes a long time to respond and I ...
7
votes
3answers
8k views

Getting 'running low on memory errors' on Windows 7 64-bit with 8GB RAM

I have a new Dell laptop running Windows 7 64-bit with 8GB RAM. If I leave the system running overnight I start getting low memory errors the next day. Looking at Task Manager it shows 6.27GB used but ...
7
votes
5answers
8k views

Why can't Windows 7 x64 use all installed memory?

I'm running Windows 7 x64 RTM on a Dell Latitude D520 w/ 4gb memory. The system control panel reports: System type: 64-bit Operating System Installed memory: 4.00 GB (3.24 usable) Why isn't ...
7
votes
2answers
6k views

How does the CPU write infomation to ram?

My question is, how does the CPU write data to ram? From what I understand, modern CPU's use different levels of cache to speed up ram access. The RAM gets a command for information and then sends a ...
7
votes
4answers
2k views

Windows RAM Test Program

I'm recently getting blue screen of death on my Windows XP machine. I suspect that the culprit is the RAM I've just installed. Is there any program that I can use the test whether my RAM is good or ...
7
votes
3answers
16k views

Can a 800Mhz memory stick be used in a 400Mhz slot?

I have a 3 years old ThinkCentre (A52, type 8381). It has 1GB of RAM in 4 256MB sticks. According to the model spec, it supports 400Mhz DDR2 memory. I would like to increase the amount of RAM I have, ...
7
votes
1answer
13k views

What does the MHz of RAM really mean?

Countless of times I've heard and read that RAM-memory can have different speeds - denoted as MHz (e.g. 1066 MHz). However, what this frequency really is has never been explained to me and I'm having ...
7
votes
3answers
1k views

How can I get more low memory with the following setup:

Modules using memory below 1 MB: Name Total = Conventional + Upper Memory -------- ---------------- ---------------- ---------------- MSDOS 14 317 (14K) ...
7
votes
3answers
11k views

How can I find out processes are using swap space?

I have a linux server top reports about 9GB of swap used: But I cannot figure where's it use swap, some google results said that top - O commad follow by p will show swap usage by process. But as ...
7
votes
2answers
2k views

RAM not usable?

I just upgraded my RAM today by adding 2 x 4GB 1333MHz DDR3 sticks on top of my 2 x 2GB 1333MHz DDR3 RAM, making a total of 12GB of RAM. For some reason before the 4GB was all usable, but when I ...
7
votes
2answers
3k views

Possible to force all disk activity to RAM?

I want to tell the operating system to stop using my hard disk and only use RAM as a cache instead. Optimally, I want to tell Windows to: a) pre-cache executable images and necessary bootstrap data ...
7
votes
4answers
13k views

Crysis on Windows 8.1 triggers low-memory warning

A more specific case of "How do I make the Windows low memory warning less sensitive?". Please don't migrate this post to Arqade; I was directed to post this question here from Arqade. I just got a ...
7
votes
2answers
1k views

Is there any command like time, but for memory usage?

Is there any command like time, but that reports more statistics? It would be great if I could do something like: $ statistics some_command time: real 0m3.002s user 0m0.000s sys ...
7
votes
2answers
2k views

Running Operating System from memory

Assuming SSD's are extremely prone to faliure how economical would it be to load an OS into main memory and run it from there? I can think I can deal with a few obvious drawbacks (I've survived ...
7
votes
3answers
3k views

Adding more RAM at different speeds? Will it impact performance as much as to make it worse than without adding it?

I got a new laptop with 4GBs of ram, expandable to 8GBs. It has 1 4GB stick DDR3 PC3-12800 at 1600Mhz. I can't seem to find another one exactly the same locally, the closest I've found is 1 4GB stick ...
7
votes
2answers
8k views

Android - Emulator takes a long time to start up

I have successfully installed Android-SDK in my computer. Generally, I test application with my real android Device (HTC HERO) so it is fast to test an application on a real device. But when I try to ...
7
votes
4answers
9k views

Mac OS X: What is using my 'active' memory?

I'm using a recent MacBook Pro with 8 GB of RAM and after a few hours of using it at work I notice the amount of 'active' memory growing and growing. Whenever I reboot my Mac, everything looks fine ...
7
votes
2answers
9k 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 ...
7
votes
2answers
5k views

Reduce “Metafile” memory usage?

My work computer (Windows 7 64-bit) spends a lot of time swapping memory when I switch between programs. This surprises me since I have 4 GB of RAM, and the programs I use aren't particularly RAM ...
7
votes
1answer
698 views

Firefox: Viewing a specific SVG file turns the system unresponsive

Important: Several SuperUser regulars are currently trying to narrow down the scope and cause of this issue. We are currently seeking willing volunteers to fill out the form here after performing ...
7
votes
2answers
6k views

Windows 7 x64 installation freezes on new PC build

Symptoms While attempting to install Windows 7 (64 bit) on my new PC build, it freezes usually at the point where it is expanding the windows image, but has frozen as early as accepting the licence ...
7
votes
1answer
7k views

What to put on RAMDisk on Windows?

I got a lot of RAM installed in my PC recently and I looked into this RAMDisk thing. There are two things I've found from my investigation: You should not mess with Windows native pagefile/memory ...
7
votes
3answers
1k views

Intel SRT vs Superfetch

I'm about to retire my old computer, and replace it with a new Sandy Bridge build. I pretty much settled for a Z68 motherboard, but I couldn't decide if I will get solid-state drive (for use with ...
7
votes
1answer
511 views

Identifying lost physical memory

I am having issues with a server running out of physical memory and I'm having troubles discerning whether it is from my application's Java process or something else on the server. Let's take the ...
7
votes
4answers
722 views

Does RAM timings with n-n-n-3n value perform better than anything else?

I want to ask something: Does RAM timings with n-n-n-3n (i.e. 8-8-8-24, 9-9-9-27, etc) perform better or is optimized more than the other who doesn't (i.e. 7-8-7-21, 9-9-9-24, etc)?
7
votes
4answers
2k views

What used the linux memory? Low cache, low buffer, not a VM

First of all, yes, I have read LinuxAteMyRAM, which doesn't explain my situation. # free -tm total used free shared buffers cached Mem: 48149 43948 ...
6
votes
3answers
1k views

Rewiring GPU with RAM? [closed]

So what I want to do is to solder the copper wire as shown in my scheme using zinc-lead-tin alloy, provided that I will remove the VRAM (connected to the RAM) so I could replace it with the wire. I ...
6
votes
6answers
843 views

Why is ram for the new macbooks so expensive?

I was pricing up a new Macbook unibody 17" and whilst following my general rule of giving a laptop as much ram as it can physically take, I fell off my chair when I saw the price. $1000 US for an ...
6
votes
8answers
21k views

How do I check speed of my RAM?

How can i know the RAM speed of my laptop? it's an Asus K40IN-VX128 How do I make sure if the frequency is 667MHz or 800MHz, I was thinking of an upgrade.
6
votes
5answers
5k views

is it important to pair RAM by manufacturer? [duplicate]

Possible Duplicate: Are there any benefits to using identical memory modules? I have a pair of mismatched RAM sticks in my laptop (slots 3 & 4 in the following image): I have a ...
6
votes
5answers
7k views

Why is my system so slow when I have so much RAM?

So I have a computer with 3.45 GB of RAM according to my OS (XP). I have 2 GB virtual RAM. My company pushes Excel to its limits of referencing other worksheets which eats up a lot of resources. ...
6
votes
5answers
15k views

What will happen if I remove the RAM while the computer is on?

What will happen if I remove the RAM while the computer is on?
6
votes
6answers
9k views

Do I need to have 3 RAM DIMMs to use DDR3, or even be able to run a 3 channel CPU?

The Core i7 CPUs from Intel (Bloomfield in the Nehalem line) are an example of a CPU that handle 3 channels of memory input, and on an appropriate motherboard, ideally making use of 3 DIMMs the best ...
6
votes
4answers
17k views

limits.conf to set memory limits

I would like to limit any process from using more than 500 MB of RAM. AFAIK this is done using RSS in /etc/security/limits.conf but the process called gnome-panel apparently is using 618436 kB of ...
6
votes
5answers
318 views

How is a byte(s) loaded from a secondary-storage device in to RAM upon bootup, if RAM supposedly already contains bits in capacitors?

This has been on my mind today. If RAM's ICs contain bits stored in capacitors sitting there, how can you pull bits from somewhere and put them where something already is? For example, on bootup, ...
6
votes
3answers
5k views

MemTest is returning large numbers of errors in Test 7, no matter what ram I use

I have been having issues with this computer, and since MemTest said that there were errors on my RAM, I figured replacing it would fix them... However, after replacing the old stick of RAM, I am ...
6
votes
2answers
6k views

How to see the content of RAM memory? [closed]

Is there any way to see the content of the RAM memory? From the first byte until the last one. I'd like to see where the OS and all the processes running on it are located in the RAM. Is this ...
6
votes
3answers
57k 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 tool which could help with analyzing memory dump or point out possible reason and further troubleshooting steps? ...
6
votes
1answer
34k views

Can you have PC3L and PC3 RAM together?

I have a pair of DDR3 SODIMM RAM modules in my laptop, and I want to replace the 2GB for a 4GB that is compatible. So far I haven't been able to find an exact match but I found a very similar with a ...
6
votes
3answers
711 views

Why is the 8GB RAM I purchased only showing as 6GB?

I bought 8GB RAM from ebay. It was supposed to be 4GB + 2 x 2GB sticks. However, when I put in the RAM it only shows me 6GB. I thought it was only 4GB + 2GB modules working, however CPU-Z shows that ...
6
votes
1answer
991 views

Can I replace a SODIMM SDRAM with SODIMM DRAM in my laptop

Can I replace a SODIMM SDRAM with SODIMM DRAM in my Acer aspire 5742g? I want to update my memory, but all this types are confusing me. I looked at my computers memory and it says it has a SODIMM ...
6
votes
5answers
3k views

Upgrading from 2GB to 8GB RAM

I have a TOSHIBA Satellite Laptop which has 2GB RAM and an Intel Core 2 Duo CPU, T5750 2GHz. I am considering buying an additional 8GB RAM for the machine. I have little knowledge about hardware and ...
6
votes
2answers
10k 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 ...
6
votes
2answers
8k views

How do I detect the RAM memory chip specification from within a Linux machine

I'd like to add more RAM to my Ubuntu installation ( running on a Dell Inspiron 640m ). Is there any inbuilt command or package to find out the current RAM chip specifications (manufacturer, type, ...
6
votes
1answer
7k views

Why SRAM is faster than DRAM?

In modern multi-core processors, the processor caches (L1,L2 and L3) are made up of SRAM with decreasing speeds(L2 caches are higher speed SRAM than L3 caches which is a cost trade-off). The main ...
6
votes
2answers
7k views

Windows, why your 8 GB of RAM feel like a few MB?

I'm on Windows 7 x64 with 4-core Intel i7 and 8 GB of RAM, but lately it feels like my computer's "RAM" is located solely on the hard drive. Here is what the task manager shows: The total amount ...
6
votes
2answers
1k views

Triple vs. Dual Channel with 6 sticks of memory

Assuming a Core i7 with a x58 chipset (IOW, triple-channel is supported)... I'm trying to decide if I need to buy triple channel memory kits. The MB has 6 slots, and I will populate them all. So I've ...
6
votes
2answers
6k views

How can I restrict RAM usage for a particular user or process?

I'm using a background service that leaks memory from time to time. To prevent using the Alt+SysRq REISUB[1], I'd like to restrict the RAM usage for one process or a system user. I really would like ...
6
votes
1answer
25k views

Do I need to worry about hard faults?

I recently upgraded my RAM from 4x1GB Corsair XMS2 to 4x2GB Kingston Hyper-x because I found that I was maxing out when running FDT, Firefox 5 and Photoshop together for any length of time. At the ...