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

learn more… | top users | synonyms (1)

7
votes
1answer
458 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
695 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
3answers
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
4answers
4k views

What happens when linux OS out of RAM and no swap

What happens when linux OS is out of RAM and no swap is available?
6
votes
6answers
1k views

Why aren't RAM drives standard in enterprise storage? [closed]

Was reading this question about storage performance and this popped up. Since RAM drives are orders of magnitude faster than any SSDs, why aren't they standard in enterprise storage systems? I mean, ...
6
votes
8answers
19k 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
13k 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
8k 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
1answer
3k 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 ...
6
votes
4answers
15k 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
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 ...
6
votes
5answers
306 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
4k 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
5k 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
617 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
809 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
2answers
15k 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: ...
6
votes
4answers
10k views

Why aren't there PCIe RAM expansions?

Perhaps I may be overlooking some aspect that is an important cause as to why these don't exist, but I feel that having RAM expansions through PCIe would be perfectly feasible. I know that a lot of ...
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
9k 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
7k 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
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
7k 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 ...
6
votes
1answer
23k 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 ...
6
votes
3answers
8k views

Mac OS X sysctl get total and free memory size

How to get on MAC OS X using sysctl used and free memory ? Searched for sysctl -a | grep vm or sysctl -a | grep mem but didn't found anything relevant.
6
votes
2answers
1k views

What kind of RAM do supercomputers use?

I was reading an article about one of the worlds fastest computers and this is one of the lines which interested me: To mimic this relatively minuscule amount of brainpower, researchers used the ...
6
votes
3answers
18k views

Is it the address bus size or the data bus size that determines “8-bit , 16-bit ,32-bit ,64-bit ” systems?

My simple understanding is as follows. Memory (RAM) is composed of bits, groups of 8 which form bytes, each of which can be addressed ,and hence byte addressable memory. Address Bus stores the ...
6
votes
4answers
12k 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 ...
6
votes
2answers
730 views

I have 4 GB RAM, but the system only reports 3 GB? [duplicate]

Possible Duplicate: Windows 7 64-bit is only using 3 GB out of 4 GB My HP HDX 16 laptop has 4GB of ram and runs a 64-bit system. I always go into Dxdiag for some reason and i always see it ...
6
votes
3answers
7k views

Very high memory and CPU usage by the OS X Dock

I have a very annoying problem with the Dock process - after more than a few hours of uptime, the memory usage will spike to more RAM than I have. The process will begin to thrash the hard drive at ...
6
votes
1answer
7k views

What's the difference between unbuffered and fully buffered memory?

I'm not new to computers, but somehow I've missed the fact that there are different types of memory when it comes to being buffered or not. What's the difference between the two? The only thing I've ...
6
votes
6answers
7k views

Windows 7 doesn't use all the available memory

I've installed 12 GB of memory on my Windows 7 computer, and yes it is a 64 bit computer. I can see the memory in bios, as well as in the properties of the computer, but when looking in the properties ...
6
votes
1answer
568 views

What are the differences between MLC and SLC SSD drives?

SLC SSD drives cost a lot more than MLC SSD drives. Are there actual differences besides cost?
6
votes
3answers
5k views

Task manager: Windows XP RAM usage doesn't add up

When using the task manager in Windows XP Pro, the amount of RAM that is listed as being used by the individual processes is not adding up to the total memory used (as listed by the total commit on ...
6
votes
2answers
167 views

Is there a difference between removing the power cable from the computer or removing it from the wall outlet?

Reading about computer related crimes and how law enforcement policies are lagging adjusting to the digital age, I came across this document which is a manual of sorts, recommendations for the first ...
6
votes
2answers
7k 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 ...
6
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 ...
6
votes
5answers
5k views

Windows hangs on Rename, Delete and Move for specific MKV files

I have been googling this issue for a long time, and no full solutions seem to be out there. For certain mkv files, windows hangs when moving, copying, or deleting. These files play fine in a player ...
6
votes
2answers
12k views

2GB limit on 32bit operating systems

Does the 2GB limit on 32-bit operating systems mean that each process can only access 2GB of memory or that all processes together can only use 2GB of the physical memory in total? So, is the 2GB ...
6
votes
3answers
404 views

If the size of the (accessible) RAM is limited, why isn't the hard disk?

When the number of possible RAM adresses is limited by the computer architecture (32/64 bit), why isn't the size of the hard disk limited? Or is it limited? If yes, what would be the highest possible ...
6
votes
4answers
19k views

How could I limit or even disable file cache on Windows Server 2008R2?

There is a machine, with a very fast RAID array, and a fast internet connection. But, it only got 8gb of mem, which runs out really quick, when the upload goes up. Any ideas how could I disable, or ...
6
votes
2answers
3k views

DDR3 Ram 1066 vs 1333?

Can I install DDR3 1333 RAM into a notebook that is currently running DDR3 1066 and will it have any effect on performance?
6
votes
1answer
8k views

Any dangers in using DDR memory with a higher frequency than the FSB?

I'm looking to upgrade memory in an older motherboard. The processor is an AMD Sempron 2500+ with a maximum speed of 333/166MHz. The motherboard is an MSI MS-7061 (KV3M-V), which accepts up to 2Gb ...
6
votes
3answers
4k views

Why does installing NVidia 9600GT graphics card, take 1GB of RAM away from Windows?

I've changed graphics cards in my PC and now Windows 7 (32bit) is reporting that I have a whole gigabyte less physical RAM in my PC. Why is this? Firstly, the machine has 4GB of physical RAM. The old ...
6
votes
1answer
492 views

What steps do you take when overclocking?

When overclocking your system? what steps do you take to get a maximum but stable overclock out of your system? I've personally just slammed up the FSB speed until my system can't run Prime95 for a ...
6
votes
3answers
974 views

4GB of RAM in MacOSX 10.5, only 3GB in MacOSX 10.6

I was using MacOSX 10.5 on my MacBook until today and I had 4GB of memory there. Now I have updated to MacOSX 10.6 and it only displays 3GB. Why is that? How can I fix it? Also, I am a bit ...
6
votes
1answer
2k views

whats the difference between ganged and unganged memory on AMD Phenom?

I recently upgraded a machine from an AMD X2 CPU to an AMD Phenom X4 and notice options for toggling ganged vs unganged for the DDR2 memory on that machine. Can someone explain what the difference ...