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

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How can a 80-bit floating point be used by a 32-bit system? [duplicate]

Since a 32bit system can't manage a 2^33 number (because the obvious 32-bit limit), how can manage a 80-bit floating point number? It should require "80-bit"...
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9answers
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How to Check RAM Size without Looking at Motherboard

As far as I am aware, one can view the RAM Size in System Properties: From the above screenshot it seems that My RAM is 3.5 GB, but as far as I can tell I actually inserted 2 two GB RAM into my ...
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Increase page file or buy RAM?

I've a 10+ year old XP PC which surprisingly still works however one of the 256MB RAM finally died. Now I am left with just 256MB. As expected the PC became slower however when I tried to increase the ...
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How much memory can a 64bit machine address at a time?

If the memory is byte addressable, shouldn't it be 2^64 / (2^10 * 2^10 * 2^10) = 2^34 GB ? A general Google search says 8GB or 16GB max. How is that true? Also, how does it depend on the Operating ...
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3answers
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Can you tell DDR and DDR2 apart visually?

I'm getting a few old computers to take apart for parts soon. Most of them are definitely using DDR2 RAM, but there is the possibility that one or two of them are using DDR RAM. Since these are ...
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8answers
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Why is usable RAM less than total RAM?

My girlfriend bought a laptop last week. It's a core 2 duo with 4 GB We installed vista 64bit, and one of the first things we did was right click on "My computer" to see gthe properties. Immediately ...
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Running Windows with defective RAM

Is it possible to run Windows (7, x64) with a defective RAM module? More precisely, is there some way to tell Windows not to allocate a known bad address or block of addresses? For Linux, there is ...
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4answers
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Is there a command to find out the available memory in Windows?

I am looking for a command that returns the available physical memory in Windows. I tried "systeminfo" but it takes too long and returns a lot of unnessesary information for me. If there is not any ...
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Wired Memory vs. Active Memory in OS X

I'm having trouble understanding the difference between Wired Memory and Active Memory in OS X. Do not talk about the four types of memory (don't talk about free or inactive memory, because I ...
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6answers
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Windows XP seemingly out of resources but plenty of free RAM and swap available

This one has been bothering me for years and so far I couldn't find an adequate solution. The problem occurs on pretty much every XP install I've done. After opening a variety of programs or the ...
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7answers
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Firefox needs 1 GB of RAM

I work as a web developer and for that I'm using Firefox with Firebug. Recently, I have noticed that after two hours of work, the firefox.exe process needed more than 1 GB of my working memory! ...
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Too much memory getting used

I have been feeling this way for a while, looking at task manager mentally ballparking how much physical memory should be in use, and noticing a large disparity. I finally got around to measuring it. ...
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1answer
643 views

What does + in the memory type of DDR4 RAM mean?

Some mainboard producers add a + to the specification of supported memory types (e.g. for ASRock X99 Extreme 3 supports DDR4-3000+). Does DDR4-3000+ somehow differ from DDR4-3000? The wikipedia ...
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4answers
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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, ...
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2answers
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How to diagnose ballooning OS X kernel_task and wired memory usage?

I have a very strange issue, which I'm having a hard time diagnosing as to the root cause. I have a Mac Pro (2008, 8-core 2.8 GHz, 8800GT) with 14 GB of RAM (recently upgraded because of this ...
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2answers
5k views

Why does RAM need to be installed in pairs?

Why does RAM need to be installed in pairs? What's the reason behind this?
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5answers
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How can I monitor video memory usage?

How can I monitor video memory usage?
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12answers
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RAM, Processor, L2Cache, Etc. - What gives you the most “Bang for your buck”?

I am not a hardware person when it comes to computers so when I buy a new one I just pick the one with the biggest numbers, but I know I am most likely wasting money. If you're going to purchase a ...
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1answer
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Motherboard and chipset specifications disagree on memory support. Which to believe?

I'd like to upgrade my ancient Super Micro SuperServer 6024H-i with a little more memory. Its motherboard manual specifies support for DDR-233/300 memory only. However, it is equipped with an Intel ...
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3answers
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How to check if two memory modules are being used with dual channel?

I have two 1333 DDR3 memory modules with different brands. I wonder if they can be used in a dual channel setup. How can I check that?
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5answers
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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 ...
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2answers
435 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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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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2answers
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What does the “Max Memory Size” on the new Intel Core i3 / i5 / i7 CPU's mean?

I just noticed in the specs of the new Intel Core i-series processors that there is a "Max Memory Size" that is usually pretty small -- anywhere from 8GB to 24GB. See here: ...
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2answers
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Why does the memory usage in “top” not add up?

I have noticed that sometimes when I run top, the memory usage of each process in the process table does not seem to add up to the total. For example, in the dump below, top says that I am using 16 ...
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How do I make Windows 7 less aggressive in caching memory?

I've noted recently that Windows 7 on my machine has been complaining about running out of memory and that I should close some programs. It would then usually point out a program I have running that ...
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1answer
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increase desktop responsiveness on linux while swapping

All GNU/Linux distributions I tested so far have the problem that whenever the ram gets filled and the system begins swapping, the whole desktop and graphical user interface becomes unresponsive as ...
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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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6answers
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How does Motherboard and CPU affect RAM choice?

I am seeking advice on which memory to use with my motherboard and CPU. Below are my components and some relevant information extracted from their official websites. NOTE: Although this is a very ...
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10answers
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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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2answers
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What are the “modified” and “standby” RAM regions in Resource Monitor?

The "Resource Monitor" tool of Windows 7 shows me a typical memory map like in the screen shot above. What are the orange colored modifed and blue colored standby regions in this graphic? What ...
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5answers
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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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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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2answers
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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 are these different kinds of memory usage in Windows 7 task manager?

In Windows 7's task manager, I can select different columns to show. There are a bunch that are related to memory and memory usage, but I'm not sure what it all means. I have a Dutch installation of ...
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2answers
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How to get results from Memory Diagnostics Tool?

I ran the Memory Diagnostics Tool in Windows 7 64 bit. I have 16G RAM. It reported hardware problems. This is a new system with new memory. When the system rebooted I was expecting an icon in the task ...
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567 views

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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6answers
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What is the relationship between CPU usage and RAM?

I have seen many times that my CPU usage is 100% and my RAM is only occupied for about 50%. What is the relationship between these two? How does one's performance affects the other?
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Windows 7 x64 - How can I test my memory?

People tell me that my computer may have some bad RAM. Is there a way to test it without special equipment?
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How can I detect the amount of memory slots I have?

I know that there used to be a Corsair memory detection tool, but I can no longer find it. I didn't find anything when searching Google. I would like to scan my machine to know a few things: How ...
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3answers
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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 8 out of memory?

I thought that Windows 8 was supposed to be better with memory than Windows 7. So far, that is not my experience. When I boot up my brand new laptop (Samsung NP550P5C-S03CA Intel Core i5 3210M 8GB ...
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4answers
6k views

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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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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2answers
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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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2answers
2k views

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 adding more RAM speed up my computer?

Apparently, you can speed up your computer by adding more RAM. Is the amount of ram to be added is directly or indirectly related to the amount of hard-disk space, processor speed, Motherboard etc... ...
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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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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