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

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Why is the recommended memory on a VirtualBox guest OS 512MB?

I am preparing to create a virtual machine on VirtualBox. The wizard asks for the memory size to use for this guest machine and it is recommending 512MB. I have 16GB of memory on my computer so I ...
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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 ...
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4answers
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Does RAM cooling make a difference to performance?

Just what the title states. I'm looking to add a heat-spreader to my DDR3-1333 CL9 chips, and wondering whether it might make a difference ... and if so, how much
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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 ...
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64 Bit OS and RAM

How much RAM can a 64-bit Windows 8 Ultimate Operating System use? I have read on the Microsoft website that you can place up to 512 gigabytes (GB), but to my understanding, I thought 64-bit implies ...
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Can I use faster DDR3 RAM than my motherboard allows?

My motherboard states it supports DDR3 1066/1333. Can I purchase DDR3 1600 and expect my system to drop it down to the highest level the motherboard supports? Will this change the Cas Latency or ...
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447 views

Why does my W7x64 laptop show 4091Mb of RAM instead of 4096Mb?

My laptop shows me only 4091 Mb of RAM instead of 4096Mb that it should. When I remove one piece of memory (it doesn not matter which one), it then shows 2046Mb. I do not remember when it started, ...
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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 ...
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Windows 7 (x64) memory usage climbs to 90%+ while system is idle?

I have windows 7 with 4GB of RAM. When the system starts from a fresh boot I start with about 33% usage. However, if I walk away with my PC idle for a few hours, or over night, my PC typically climbs ...
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Web browser memory usage

How come web browsers are so heavy in memory? I have Firefox opened with two tabs, and it takes over 800 MB of RAM, Chrome with four tabs takes over 1.2 GB! I mean, what's up with consuming ...
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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 ...
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RAMDISK OS? Installing Windows 10 on a ramdisk

Is it possible to put the entire operating system on a ram disk? If I have 16 GB of RAM and it is an Intel Xeon. I don't have an SSD and my hard drive is killing my boot time. So can I just allocate ...
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Windows 7 100% Memory Usage (without any process listed as using that much memory)

When I plug my external USB 2TB hard drive into my windows 7 box, my RAM usage climbs up to all 4 Gigs (but in task manager it shows that all process are small) and the hard drive is churning like ...
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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. ...
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Releasing swap space

At times the kernel seems to be intent on keeping e.g. firefox in swap, even though there is enough physical memory available and I'm using firefox: robert@rm:~> free -m total ...
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Why does unequal amounts of RAM in each slot decrease performance?

This page describes the RAM specifications for many of the MacBook laptops. In the section for my laptop (13" Pro Late 2011), it says: Additional Notes: For best performance, fill both memory ...
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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?
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8GB RAM on XP Professional [duplicate]

I recently installed 8GB of RAM onto a quad core workstation (HP xw8600) running Windows XP Pro (32-bit). I added the /PAE switch in the boot.ini file, but the SysInfo is saying 3GB total memory ...
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What exactly does “(OC)” mean in products description

Note: this is not a shopping recommendation request I want to buy a nice and fast RAM and a motherboard that supports it. Lets say that I would want to take this RAM (2400MHz), and put it into this ...
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On x86 architecture, why are there fewer bits for virtual address space than physical?

I was reading this article on 64 bit computing, and it mentions: For example, the AMD64 architecture as of 2011 allowed 52 bits for physical memory and 48 bits for virtual memory I would think ...
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What happen if we reduce the size of hiberfil.sys

I today discovered that we can set the size of the hiberfil.sys using powercfg -H -size 100% command line tool. Ignoring the hard space you will get, what else will change if we set it to powercfg -H ...
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How can I shrink my 12GB pagefile.sys?

Even though I only have 4GB of RAM, I have a 12GB pagefile.sys. From what I've read about the topic, this is bigger than the x1.5 rule-of-thumb and it's also taking a huge chunk of space on my hard ...
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Can Linux scrub memory?

Does Linux have a mechanism to "scrub" memory? e.g. testing the memory and marking areas as dirty if they fail so that the system can continue to operate "safely" even with bad ram chips installed?!
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Why are there different clockspeeds and timings on RAM?

I don't consider myself a novice when it comes to building computers or computer hardware in general, but I've never taken the time to fully understand RAM. Can somebody tell me why there is a need ...
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462 views

How to “swap in” again memory from page file to physical memory in Windows at once (like linux swap-off)

Is there a way to swap back in (to put back all the memory data that was put into the page file (or swap, whatever you prefer)) memory on a windows PC? On linux, one can easily do this with the ...
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8answers
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run a computer without RAM? [duplicate]

I was reading about CPU fetch time, where I found that CPU take very less time to access data from RAM as compared to accessing hard disk, and that RAM is present for storing the information and data ...
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What does fCK (RAM memory speed) stand for?

Looking at the specification of a RAM memory module from Kingston, it says: 800MHz fCK for 1600Mb/sec/pin What does "fCK" stand for?
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Windows 7 using exactly HALF the installed memory

I've taken this directly from system information: Installed Physical Memory (RAM) 4.00 GB Total Physical Memory 2.00 GB Available Physical Memory 434 MB Total Virtual Memory 5.10 GB Available ...
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What happens when you install > 4GB of RAM in a computer with a 32-Bit OS?

So I'm a programmer and I'm not a complete idiot so I know exactly why you can't access memory where you can't have pointers. But I've never tried this and I don't think I ever will because it seems ...
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Does the 4 GB RAM limit on 32-bit systems also affect the swap space?

It is well known that 32-bit systems can only handle 4 GB as maximum amount of RAM. Under Linux, does this limit also apply to swap partitions? If my RAM + swap exceeds 4 GB, will it be fully used? ...
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Will 8GB RAM stick work if my motherboard has limit of 16GB (for 4 slots)?

This one is quite tricky and I can't find any decent information source/documentation. I have Gigabyte motherboard from 2008: Gigabyte MA770T-UD3P rev. 1.0. It has 4 RAM slots and total limit of ...
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How can I get my 64-bit computer to recognize all of my RAM

I've recently upgraded my system from 6GB of RAM to 12GB. Once I installed the new RAM, Windows 7 shows in my System Information that I have "12.0 GB installed (7.99 GB usable)". Although less common, ...
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Can ASRock N68C-GS4FX Motherboard w/ AMD Phenom II X4 940 run DDR3 RAM?

I have recently upgraded my Motherboard and am now looking at RAM. I have an ASRock N68C-GS4FX Motherboard and a AMD Phenom II X4 940 Processor. I have used the CrucialPC system scan application, and ...
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Why is SRAM 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 ...
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In Windows 7, is there a way to know how much memory a service is using?

In windows 7, is there a way (by using common interface or a custom utility) to know how much memory a specific windows service is using ? It seems most services are hosted by svchost.exe processes ...
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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? ...
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Auto-restart mysql when it dies

I have a rackspace server that I have been renting to run my personal projects upon. Since I am cheap, it has 256Mb of RAM and honestly can't handle alot. Every once in a while, when there is a sharp ...
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3GB RAM Installed and Detected by BIOS, Windows Vista 32bit Only Sees 2GB

I am attempting to install more RAM on a Windows Vista 32bit machine which is using a X6DAL-XG motherboard and the RAM amount reported in the BIOS is 3GB+, but Windows is only reporting 2GB installed. ...
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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 ...
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How do I interpret the specification of memory (RAM)?

When looking at memory there are a few specifications that I don't understand and was hoping to have clarification on. What do these terms mean, and how do they affect the systems performance? Feel ...
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12answers
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Is it possible to limit the memory an application is allowed to use?

I've used tools to effectively reduce the amount of RAM available to all applications, but is there something to do the same on a per application basis? Specifically, I'm looking to limit the memory ...
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How does hibernation work?

I'm wondering how hibernation works. Obviously it writes the contents of RAM to disk, but is there anything else? does it save/restore CPU state? cache state? anything else?
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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 ...
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What is Performance Monitor telling me when my page faults / second are high?

I have a Windows 7 64-bit computer that is having performance issues. After some investigation, I have discovered that the page faults / second on it - as reported by Performance Monitor - are really ...
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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.
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Which files are cached by linux?

I understand that linux uses unused RAM to keep some files cached. But I wonder, which files it actually caches! If you take a look at free : Gesamt Belegt Frei Gemeinsam Puffer Cached Speicher: ...
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how do people recover data from ram?

I'm just curious. I've read about law enforcement and what not recovering incriminating data from ram to get evidence, but how is it done? What kind of equipment would one need to recover files from a ...
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Will Mac RAM work on a PC?

I have some Mac RAM at school that is not being used. It has never been opened before, and one of the PC's needs a little extra. Will putting Mac RAM in be an issue? The RAM also is not labelled, how ...
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I've got RAM everywhere. How do I identify it?

I've pulled RAM from a bunch of old PCs and I'm ready to find the largest modules to reuse. Most of it is just SDRAM but some of it doesn't have any identifiable markings that might explain it's ...
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How does RAM frequency and latency differ? How does it affect performance?

I have a question regarding two specifications of RAM memory, the amount of Mhz and the latency timings (example: 9-9-9-24). Which one of the two is most important for system performance and why? ...