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

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11
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6answers
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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 ...
7
votes
3answers
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 ...
21
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2answers
21k 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?
20
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3answers
5k views

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

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 ...
14
votes
3answers
29k 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 ...
13
votes
4answers
7k views

Is there an equivalent of Memtest86 for CPUs?

I need an easy way to do system stability tests. I have come to rely on Prime95 which does a fantastic job of proving stability (or instability) very quickly; but it requires an OS installed. I would ...
1
vote
2answers
45k views

How can I tell if my motherboard supports DDR2 or DDR3 RAM?

I'm going to be buying 4 gigs of DDR3 RAM. I don't think I can run 5 so I'll just remove the single gig of RAM that I have in now. How can I tell if my motherboard will support DDR3 RAM? I ran CPU-Z ...
22
votes
10answers
21k views

Computer slow after installing 32GB RAM

I'm currently running very large network simulations for my PhD research, for which I need lots of RAM. I have a Core i7 2600K processor with a Gigabyte GA-Z68AP-D3 motherboard, running Windows 7 ...
21
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 ...
18
votes
7answers
1k 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 ...
6
votes
2answers
11k views

98-100% memory use, no process uses more than 25MB

I am having intermittent issues with my gaming computer. Sometimes, while playing Battlefield 3 (only 2 times the problem has occured), my memory usage goes to 100% of my 16GB machine. I close down ...
6
votes
3answers
12k 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
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2answers
6k 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, ...
4
votes
1answer
1k views

Commit Charge < Physical Memory?

If Commit Charge is the total amount of physical memory and virtual memory; how can Commit Charge ever be less than Physical Memory? For example; I have in System Information in Process Explorer ...
4
votes
3answers
36k 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? ...
3
votes
3answers
3k views

12 GB of RAM only 8GB is usable

Hi I'm running a Dell Studio XPS, with quad core processor, 2 threads per core, with 12 GB of installed RAM. My problem is according to windows, only 7.99GB of that RAM is usable. The really weird ...
3
votes
3answers
3k views

How to identify different types of RAM [duplicate]

Possible Duplicate: Can you tell DDR and DDR2 apart visually? I would like to know how to identify different types of RAM like: SDRAM, Dynamic RAM, DDR, DDR2, DDR3, DDR4
2
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5answers
666 views

Has anyone succesfully installed windows 7 on a system with a low amount of ram?

The system requirements from Microsoft about Windows 7 outline a minimum 1 gb for a 32 bit installation. Does anyone have any advice, tips, success or failure stories about trying to get it running ...
1
vote
6answers
1k views

Windows XP slowdown, what's to blame?

I run Windows XP and after a while it seems to get real sluggish. I suspect it's heavy memory consumption of Firefox, but have noticed several other programs are 'slow' to exit when I reboot. Is ...
0
votes
5answers
11k views

4GB of RAM on Windows 7 32-bit [duplicate]

Possible Duplicates: Windows XP and RAM 3.5GB+ Is there way to enable 4 GB RAM in 32-bit Windows OS? I installed 4GB of RAM on my Windows 7 Ultimate 32-bit (it used to have only 2GB). ...
12
votes
3answers
2k 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 ...
8
votes
1answer
1k views

Performance of Multiple RAM Sticks Compared to Single Sticks

It's no secret that using two physical drives gives better performance than two partitions on the same physical drive; because there are two devices, they each have their own platters, head, caches, ...
7
votes
3answers
358 views

Is storage hierarchy the path of data flow?

I was wondering if CPUs read and write data (almost) always following the hierarchy of storage: CPU <- register <- CPU cache memory <- main memory <- secondary storage ? If without ...
6
votes
3answers
2k views

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 ...
6
votes
3answers
6k 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
19k 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
5answers
7k 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 ...
5
votes
4answers
569 views

Buying more RAM [duplicate]

I have 2 memory sticks, each 1GB, DDR2 operating at 667 mhz. I'm looking to buy 2 GB more, and have two questions: Should I buy 2 pairs of 1 GB, or 1 stick of 2 GB? Does it make a difference ...
5
votes
3answers
19k views

Hardware reserved memory issue

I've seen lots of folks having problem with **hardware reserved" memory issue in Windows 7/Server 2008 R2. I have it myself but not as huge as others have. Problem description When you install ...
4
votes
3answers
17k views

4GB to 8GB RAM, what performance increase?

I am wondering whether it is worth upgrading from 4 GB to 8 GB of RAM. I know the question has been asked many times, but I can't transpose that to my case. I'm using Windows 7 64-bit. I did a test ...
4
votes
2answers
396 views

Is it possible to boot a consumer i7 system with a Xeon processor and ECC memory?

I have read a couple of blog posts on the Internet that appear to imply one can boot at least some i7 motherboards with unbuffered ECC memory and a Xeon 43xx processor installed. I can boot my MSI ...
4
votes
4answers
4k views

Why do we need to set swap space as twice big as our physical memory?

When we want to setup a linux system, there is a common a suggestion to set the swap space twice as big as your physical memory. I want to know why do we need this, and how it is this suggestion come ...
4
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4answers
5k views

Does “core” mean CPU or memory or both?

I was wondering what "core" means? CPU or memory or both?
4
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2answers
772 views

Virtual memory on Linux doesn't add up?

I was looking at System Monitor on Linux and noticed that Firefox is using 441 MB of memory, and several other applications are using 274, 257, 232, etc (adding up to over 3 GB of virtual memory). So ...
4
votes
3answers
8k views

MacBookPro RAM: CL7 or CL9

I want to increase the RAM in my MacBookPro 15", 2.53 GHz, Mid-2009. I currently have 4GB, and I want 6GB (and upgrade to 8GB later - I think this should work with my model: ...
4
votes
3answers
2k views

How does increasing RAM effect laptop battery life on standby?

Just a simple theoretical question: Does increasing the amount of physical RAM on a laptop affect the battery life while in standby? I always thought the only real difference between hibernate and ...
3
votes
2answers
627 views

Get process memory consumption

I need a command that can get the memory consumption of a process called "job_runner_o". Running ubuntu 10.10 Any thoughts?
3
votes
1answer
662 views

pc ram memory 2x1GB or 1x2GB

I don't know if it's the right place to ask but can somebody advise me for buying a ram memory for my computer. I have a Dell Vostro 200 with 1GB of RAM and 667MHz. (2 x 512MB) I want to buy raise ...
3
votes
7answers
623 views

Why do I have less memory with 32 bit OS [duplicate]

Possible Duplicate: Will Windows 7 32 bit edition support 8 GB RAM? I have a brand new machine at work, i7 quad core with 8GB of ram. Mainly, I use it to develop JAVA applications using ...
3
votes
5answers
11k views

Memory upgrade to 8GB on unibody MacBook

I bought the 13" unibody MacBook one month prior to it's upgrade to become the new improved 13" unibody MacBook Pro (with unopenable battery compartment, extra 3 hours of battery life, more color ...
2
votes
1answer
3k views

Calculate performance of RAM using timing and speed

if an 8gb DDR3 SDRAM 1600MHz has a timing of 8-8-8-24, how can I calculate if it will have a better performance than a 2x4gb DDR3 SDRAM 1866MHz with a timing of 9-10-9-28? Also, will a 2x4gb DDR3 ...
2
votes
2answers
490 views

Tool for diffing large files

When I use "diff" to find the difference between two large data files, diff A.txt B.txt > dif.info it is output: diff:memory exhausted or add the argument "-H" diff -H A.txt B.txt > ...
2
votes
4answers
476 views

32 to 64-bit with more RAM, or SSD? [closed]

I'm considering either going 64-bit Windows (Dell i7 laptop) or getting an SSD. I can only get one. Things I run a lot: SSMS Visual Studio Office 2010 Lots of programs simultaneously. What will ...
2
votes
1answer
260 views

Memory usage for application listed in Task Manager is not a good indication?

I read somewhere (I think Mark's blog from sysinternals), that the memory a program takes up as listed in Task Manager is not a good way to judge where all the memory on your pc is performing. Is ...
2
votes
4answers
12k views

How do I give a program high priority for memory and processor speed?

I use NaturallySpeaking a lot, and it's a great program, but it's very processor and memory intensive. As long as it's being used, it works fine, but if I tab away to another program for five minutes ...
2
votes
4answers
1k views

Is DDR3 worth it? [closed]

I'm looking at some of the gaming PC's on NCIX.com and the ones that support DDR3 are at least about $400 more than the most expensive DDR2 PC's(when other factors are ignored). Is it worth upgrading ...
1
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4answers
134 views

How can RAM contain a “memory map” if RAM is unaware of the overall system?

This question concerns hardware more than software. Basically, citing from this article on memory maps, it says that: In computer science, a memory map is a structure of data (which usually ...
1
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3answers
711 views

32 bit windows max ram with discrete graphics card

I understand that if I have an integrated graphics and 4 gb of ram, windows 7 needs to address some of it o the integrated ones. However how come if I have a discrete graphics card with 1 gb of vram, ...
1
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2answers
340 views

Why does my computer crash when I use 2 memory sticks? [duplicate]

Possible Duplicate: Installing two RAM sticks causes problems; using only one of them doesn't? Motherboard: P7N SLI Platinum Memory sticks: 2x DDR2 PC2 6400 It works fine with one ...
1
vote
2answers
622 views

Windows 7 x64: 3900mb of 4gb RAM usage, even when (almost) nothing running

As the title suggests, I am having a problem with memory usage. I have had my computer (Vaio AW11Z/B laptop) for over a year now, and it was running perfectly until I guess a day or two ago. Now ...