Questions tagged [memory]

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

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Computer boots to first screen and freezes

Computer boots to first screen and freezes. I reseated the ram and it boots until I shut down. On next reboot it freezes. Have replaced with new ram and it is still freezing until I reseat the ram. ...
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Why a 200 MB text file overloads 4gB ram

I wrote a simple program in c++ that does some calculations, outputs a number to a textfile, and repeats. Several million times. The final text file was around 215 megabytes, yet when I opened it, ...
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Why RAM memory has no partition scheme?

Another way to ask this would be: "why Hard Drives, Pen Drives and SSD need a partition scheme and the RAM doesn't?" Just trying to understand better how all memory thingies work.
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Determining if a SIMM is EDO

I’ve used some simple methods to determine the parity and speed, and calculate the size of several SIMM sticks, but now I need to figure out if they are EDO. Does anyone know of a way to determine ...
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Windows XP: 4GB to 16GB RAM upgrade

I'm on a 32 bit OS Windows XP Home–will be upgrading to a 64 bit XP Pro–and I'm upgrading my RAM to 16GB. Should I see a difference? I typically compress a ton of files at one time. The 32 bit @ 4GB ...
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New PC Build w/ Asus P8P67 Pro and 16 GB DDR3 1333 RAM, only 8GB shows on System

I just built my first PC and only 8 of 16 GB Ram shows up on the system. I took out all of the RAM and put it in a different order, turned it on and 16GB Ram showed up. But when I restarted the ...
Ethan's user avatar
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ulimit broke my server

I ran "ulimit -v 75" to get SBCL working, and now nothing will run on my server. $ sbcl Killed $ vi Killed $ man ulimit Killed $ ulimit -v 256 -bash: ulimit: virtual memory: cannot modify limit: ...
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How to downgrade server kernel to desktop kernel?

Currently I am looking at this way to solve my problem that uses more than 3GB RAM on 32-bit Ubuntu. For various reasons, I am trying to downgrade server kernel to desktop kernel. Can anyone give me ...
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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 ...
Pablo's user avatar
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Is that true that Windows can eventually address executable files as if they were parts of virtual memory?

I've once read somewhere that Windows can treat programs' executables and DLL files as parts of swap file rather than duplicating their content into pagefile.sys when swapping them out of physical ...
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How to tweak Windows hard disk writing and reading cache buffers parameters without help of commercial utilities?

I'd like to configure Windows (XP actually, but knowing how to do this with 7 can once come in handy as well): Use large (several hundreds megabytes) amount of RAM for disk i/o cache Use large ...
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How to check which devices reserve memory?

I just installed two 4GB DIMMs (8GB in total) into my laptop (Lenovo T510). Previously, I had two 2GB DIMMs (4GB in total). Anyway, looking at Windows 7's system information applet, I see the ...
CAholdem's user avatar
8 votes
2 answers
19k 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 ...
Mad Scientist's user avatar
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The TLB changes whenever a program does a context switch?

If the TLB gets flushed everytime a program does a context switch, then when that program is run again, where does the TLB go to reload its table? Also, if the table gets flushed, then how are other ...
tony_sid's user avatar
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Is the old 4 gigs of memory is maximum useful still applicable? (win7 64bit OS)

Is there a benefit to be had from buying more than 4gigs of memory? Does anything else besides your OS being 64 bit come into play? Does your motherboard play any part?
Maslow's user avatar
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Program to monitor processes with high CPU usage and memory consumption in realtime [duplicate]

Possible Duplicate: Software to monitor a CPU usage and RAM usage of a process? I need a program that monitors the top five (or similar) processes according to CPU usage and memory consumption. ...
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Size of L1 cache

Typically, how big is L1 cache today?
tony_sid's user avatar
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How to free memory in Mac OS X?

I have Macbook Pro running Mac OS X Leopard (10.5) with 4GB RAM. I use some applications (Parallels for Windows (1GB RAM), Firefox, mail, freemind, iTunes, Finder, Terminal and that's it), and I can ...
Open the way's user avatar
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9 votes
4 answers
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Is DIMM to USB convertor available?

I have a 512MiB DDR2 SODIMM SDRAM lying about, after upgrading my brother's notebook's to 2GiB. Seeing that it is not being used, and it hardly has any value on the market, I'd love it if I can use it ...
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Is Cache memory located in the CPU or at the motherboard?

I have a doubt whether cache memory is located in the processor or at the motherboard?
student's user avatar
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Why can't graphics cards just have more memory?

Something I never understood, why do graphics cards usually have small amounts of memory on them? I know memory isn't everything, but surely it's pretty cheap just to load 4gb of memory on any old ...
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Out of memory Problem

I'm running a C++ program in Ubuntu 10.04 (32-bit system architecture). If I calculate the amount of memory that my program uses, it comes up to 800MB. I have a 4GB RAM in place. But still before the ...
0x0's user avatar
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Why is my DDR3-1333 ram running at DDR3-1066 speeds?

I have an HP Pavilion DV7-4100 (Intel i5-460m). It's user guide specs show DDR3-1333 and it came with 2 sticks of it. However, several utilities show: Dram Frequency: 533mhz Timing - 7-7-7-20 FSB - ...
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Is there a way to use idle computing power in my second laptop to speed up my main laptop?

I'm not sure if this question makes sense, but I'm going to try: My second laptop is more powerful than the one I use at home (more RAM etc). I'd like to continue using my slower laptop as my main ...
oxo's user avatar
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4 answers
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Can I put 1600MHz memory in a Macbook Pro?

Is it possible to put 1600Mhz memory in a 17" Macbook Pro? Or does it have to be 1066Mhz?
Skadoosh's user avatar
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how to tell what memory is what [duplicate]

Possible Duplicate: Can you tell DDR and DDR2 apart visually? what dose 64mb and 128mb look like?
drew's user avatar
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1 answer
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Can two same single RAM chips start to work in dual channel?

Do i need to buy a dual-channel memory kit in order to use Dual Channel? If I have a single 2GB chip and a mainboard which supports Dual Channel, can I expect to have dual channel enabled if I buy ...
Kos's user avatar
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CPU speed vs Memory Speed when buying a new PC

I'm trying to buy a new (custom) PC. I'm not technically illiterate, but I haven't kept in touch with the hardware world. While using one website that helps you configure your own PC, component by ...
egarcia's user avatar
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3 answers
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Why does my computer slow down after being on too long?

I'm sure everyone has experienced it - if you leave a computer on too long, every once in a while, it needs a fresh reboot. I have a laptop, and I only hibernate it, but every week or two, I'm going ...
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Will increasing RAM improve Lightroom 3 large tiff loading times

Set up: mid 2009 17" unibody MacBook Pro 4GB RAM 2.66 Core 2 Duo Snow Leopard 10.6.6 Lightroom 3 When working with 12 MegaPixel RAW files from a Nikon D700, no problem. Lightroom is fine. Recently ...
andy's user avatar
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21 votes
6 answers
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How do I quickly stop a process that is causing thrashing (due to excess memory allocation)?

We've all experienced it--some program is asked to do something that requires a huge amount of memory. It dutifully tries to allocate all this memory, and the system immediately begins thrashing, ...
nibot's user avatar
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1 vote
4 answers
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Macbook : Replacing RAM while on hibernate?

Although it is implied that all the content in memory is written to the hard drive under forced hibernation (using pmset), I'm still unsure whether it is safe to upgrade my macbook's memory during ...
felace's user avatar
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1 answer
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Laptop RAM upgrade - 266mhz or 533? PC2-4300 or 4200?

I want to upgrade the RAM in a Toshiba Satellite M70 SR3 Laptop. SIW diagnostic software gives me the follwing info about the current RAM: Capacity: 512MB; Type: DDR2 (PC2-4300); Speed: 266Mhz (DDR2 ...
David's user avatar
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1 vote
3 answers
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1 out of 2 sticks of RAM stops computer from booting

my computer stopped booting one day for some reason, so I bought a new motherboard, same thing happened, then I bought a new CPU and still happening! Then when I decided to test the RAM sticks, I ...
Erik's user avatar
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2 votes
2 answers
3k views

How does the number of sticks of RAM influence speed, for the same total amount of RAM? [duplicate]

Which will run faster: four 1GB sticks of DDR2 RAM, or two 2GB sticks? Will they run at the same speed? I'm just curious since they are sold in both sizes, and I have four slots, but only two sticks ...
james stitzel's user avatar
2 votes
4 answers
368 views

What could cause a computer to slow down over time?

I have an application/game that ran smoothly a few months ago but lately I've realized it runs more sluggish than usual (the frames per second get quite low). I thought maybe something I installed is ...
Steve's user avatar
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14 votes
6 answers
24k views

Windows XP + PAE + 6GB RAM: See more than 3.5GB?

Firstly let me say I've seen a number of similar questions on SuperUser, and I don't think this is a duplicate. (Most address 4GB RAM installed. I have 6GB) I have Windows XP 32-bit running on a i7-...
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Is it bad to run ram at higher voltage?

Let me start with I know nothing about overclocking. All I know is that my machine won't boot with all 6 ram slots full. The ram I have is supposed to be at 1.5v but in order to even boot my system ...
Mike's user avatar
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In 2 GB RAM installed computer, in task manager performance tab (Available + cached + Free ) memory add up only to about 1.2GB?

I have installed windows 7 in one of my machine. It has 2 GB RAM but when work for some time it gets very slow when see performance tab of windows task manager (Available + cached + Free ) memory not ...
DSharper's user avatar
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1 vote
1 answer
842 views

Upgrading a Macbook Pro from 4GB to 8GB memory

My Macbook Pro came with 4GB memory but has a capacity of 8GB. If I want to upgrade to 8GB, can I just buy a 4GB memory stick and add that in, or will I have to buy two 4GB memory sticks? I know there ...
tony_sid's user avatar
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7 votes
4 answers
11k 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 ...
BastiBen's user avatar
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4 votes
1 answer
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How do I use memmap to reserve memory on boot?

I have a laptop with some corrupted ram addresses, so I'm trying to use memmap to reserve them before linux boots up. I have been trying to use memmap=10M$1024M as a kernel boot option, but linux ...
alexl's user avatar
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2 votes
1 answer
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What's faster? A Single channel DDR3 or a dual channel DDR2?

I wonder if Dual Channel DDR2 is faster than Single Channel DDR3 or that DDR3 is so much faster that the Dual Channel doesn't matter.
enon's user avatar
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can I check this RAM?

I have a couple 2 gig sticks of RAM which are the right speed for a desktop i have but I checked on the crucial website and it said my board only supports 1 gig per slot and a total of 4 gigs. I was ...
Mykul's user avatar
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0 votes
2 answers
303 views

PC3200 RAM in Older Computer?

I am inheriting a Dell Dimension 8200, but it needs RAM to get up and running. I have PC3200 sticks lying around, but I am not sure how to go about figuring out if the RAM is compatible, as RAM has ...
skaz's user avatar
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2 votes
1 answer
963 views

Do motherboards automatically set memory voltage?

Let's say I have a motherboard whose stock PC3200 DDR memory modules are fed a standard 2.6 V. I now replace them with performance sticks, which according to the manufacturer need to get the "...
Bo Real's user avatar
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1 answer
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Confusing relation between RAM frequency and timings

I'm confused with relation between frequency and timing information when buying DDR3 RAM modules. I have OCZ DDR3 modules which should have 1600MHz frequency and CAS 7-7-7-20. If I use these modules ...
Ladislav Mrnka's user avatar
2 votes
3 answers
3k views

Sound distorted after upgrading RAM

I upgraded RAM on my old Asus M2N-E SLI today and sound does this hiccuping, sometimes distorted sound when I run some video or game. Old RAMs were 3x 1GB DDR2 memory stick at 667MHz (non identical ...
Ondrej Slinták's user avatar
4 votes
1 answer
4k views

How BIOS shadowing works

I heard that BIOS shadowing works by copying the BIOS program into faster memory and running it from there. Is that correct? BIOS is responsible for certain startup tasks, so after startup, does it ...
tony_sid's user avatar
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2 votes
2 answers
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Maximum memory speed using a non-overclocked Intel Sandy Bridge (socket 1155) Core i5

I've read a couple of similar questions on this subject here, but I'm still confused: I'm about to buy a new PC and I'm interested in a Core i5 (2500). Apparently the CPU supports DDR3 1066/1333 ...
Manos Dilaverakis's user avatar

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