A CPU (Central Processing Unit) is the chip responsible for actually "doing" most the instructions given to a computer.

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Setting CPU cores off-limits to all threads not specified (preferably in Windows 7)

I have a really specific machine configuration in the works that would really be helped out if there were any way to do this...basically what I'm looking for is the opposite of setting CPU Affinity ...
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3answers
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Why does my Intel i7-920 display 8 cores instead of 4 cores?

When I go to the task manager I see 8 processors but I know that I have 4. Why?
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4answers
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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 ...
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4answers
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How to set processor affinity on OS X?

How do you set processor affinity in Snow Leopard on a MacBook Pro?I know in Windows you could just switch it in Task Manager.
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After Intel's admission, should Sandy Bridge processors be used?

I'm planning on getting a custom desktop PC assembled. I had planned on an Intel i5-2400 (Sandy bridge) processor in tandem with an Asus p8h67mle motherboard. After Intel's admission of a ...
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1answer
4k views

How to slow down my CPU?

I have Vaio Z-690 laptop, and its processor speed is 2.66 GHz. I don't need too much speed, and I'm OK with 2 GHz or even less. Just for browsing websites it's enough. I want to slow down ...
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1k views

Where are Intel Itanium chips used?

I think that all the Intel chips I've ever bought were IA-32 architecture. Are Intel Itaniums sold in desktops or laptops?
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5answers
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Why has the size of L1 cache not increased very much over the last 20 years?

The Intel i486 has 8 KB of L1 cache. The Intel Nehalem has 32 KB L1 instruction cache and 32 KB L1 data cache per core. The amount of L1 cache hasn't increased at nearly the rate the clockrate has ...
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287 views

Single Quadcore or Dual Dualcore?

If you have to choose (everything else being equal) between one processor with four cores, and two processors with dual core, what are the points in favour of each solution?
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928 views

What determines endianness

I was wondering if endianness only depends on CPU? Does it depends on other hardware, such as memory, secondary storage device? Does it depends on OS? Why in Wikipedia, does it seem to be true?
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1answer
149 views

Is performance increase through doubling available cpu cores by using a dual-cpu pc the same as using a cpu with twice as many cores?

Imagine this base configuration: 1-cpu board with a 4-core processor, performance is 100%. How different from that configuration performance-wise will be: 2-cpu board with 4-core processors 1-cpu ...
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4answers
6k views

VirtualBox CPU usage 100% on host [closed]

I have installed VirtualBox 3.1.2 (latest) on my Windows 7 (x64). In the VirtualBox I've installed Windows 7 (x64). I have 4 GB RAM installed. The guest has been assigned a 1536 MB RAM. Sometimes the ...
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6answers
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In which direction should an extra case fan be fixed? [duplicate]

Possible Duplicate: Optimal Fan Placement and Direction for Air-Cooling a Computer This may sound dumb but this is a genuine question. I just bought an extra fan for the case and installed ...
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5answers
9k views

Should I get integrated graphics if I already have a dedicated GPU?

I want to upgrade my computer to the new Sandy Bridge CPU's, which features integrated graphics. However, you have to choose between two types of chipsets: H67 or P67. Now since I already own a ...
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4answers
11k views

How do I know if my linux kernel is running in 32bit or 64bit?

When I do a cat in /proc/cpuinfo it shows a line with clflushsize : 64 Does this mean my kernel is running in 64 bits?
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4answers
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Zombie process using 100% CPU

A zombie process, which should not be using any resources (RAM and CPU), is hogging up an entire core on my 8-core 64-bit Ubuntu 11.10 Desktop installation. This is the output of ps -el|grep Z: F S ...
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3answers
378 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 ...
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3answers
738 views

How to unglue microprocessor from heat sink?

I disassembled a Dell Precision 530 and replaced 5! bad capacitors. I tried to reassemble it but realized that I cannot succeed unless I can remove the microprocessor from the heat sink. The ZIF ...
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2answers
181 views

Heat Transfer Paste reapplication

I am assembling this PC http://www.codinghorror.com/blog/2007/07/building-a-pc-part-i.html Of course, I'm in Geek Heaven. :D I installed the heat sink fan in the wrong direction, and now I want to ...
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4answers
6k views

Does “core” mean CPU or memory or both?

I was wondering what "core" means? CPU or memory or both?
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2answers
1k views

Why is my new Phenom II 965 BE not significantly faster than my old Athlon 64 X2 4600+?

I recently rebuilt my 5 year old computer. I upgraded all core components, in particular from an Athlon 64 X2 4600+ at 2.4 GHz with DDR2 800 to a Phenom II 965 BE (quad core) at 3.6 GHz with DDR3 1333 ...
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2answers
2k views

1:1 FSB to DRAM Ratio

Why is it recommended to have a 1:1 ratio of Front-side Bus and DRAM? Does it really affect the performance of the CPU?
3
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1answer
4k views

Underclocking without BIOS option

I have never over/under/downclocked my laptop, however it is seriously suffering from overheating. I have cleaned it out and am running the fan at full speed the whole time. I also have turned the ...
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2answers
2k views

What do “processor” and “cpu cores” mean in /proc/cpuinfo? [duplicate]

Possible Duplicate: Difference Between Cores and Processors What do "processor" and "cpu cores" mean here? cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu ...
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1answer
645 views

If I use a discreet GPU with Sandy Bridge, would Sandy Bridge's on-die GPU be sitting idle and be completely wasted?

Or would the on-die GPU somehow work with the discreet GPU and still be productive?
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3answers
2k views

Slowing down cpu speed

How to slow down my laptop cpu so that it does not overheat?
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3answers
6k views

Impact of the L3 cache on performance - worth a dual-processor system?

I will be purchasing a new high-end system, and I would like to have a better sense of whether a dual-processor Xeon system (I am looking at the new, high-end Xeon E5-2687W) might, realistically, ...
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1answer
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Windows BSOD when all cpu cores enabled

I'm getting a blue screen "A clock interrupt was not received on a secondary processor within the allocated time interval", just a few seconds after the Windows desktop is loaded. (For reference, ...
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2answers
3k views

My Samsung R480 laptop freezes for short and inconsistent periods of time

I have a Samsung R480 laptop running Windows 7. It's great, I love it to death, but every so often it'll start having, for lack of a better term, "hiccups". It would freeze completely, emit a loud ...
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4answers
157 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 ...
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1answer
164 views

What does CPU usage for a process actually mean

Assume the computer has a single core - what exactly does it mean for process A to be running at 100% CPU capacity vs (lets say) 10% CPU capacity. If the CPU was 2.0 GHz, does that mean in a time ...
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8answers
2k views

Given a processor specification how can I figure out what RAM it can use?

If I have a number of varying processor specifications (x86, x64, PII, P4 etc) can I accurately calculate the memory (speed, size, etc) that will work with the CPU? I appreciate that the motherboard ...
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3answers
534 views

CPU overheating, the fan won't speed up, but it's not the fan

I have 2 identical PCs, with the only difference being the GPU. One of the CPUs is overheating without the fan going up in speed, but if I gently press the fan manually, it speeds up as it seems to ...
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1answer
360 views

Is reducing maximum processor usage in Power Options safe?

My PC has: Core 2 Duo 4GB RAM ATI 5450 Radeon graphics Windows 7 64-bit I want to reduce maximum CPU usage in Power Options in the Control Panel to avoid overheating. Is this safe, or ...
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185 views

Software for alerting when CPU temperature is critical [closed]

What software for Windows can run in background and show alert window when CPU temperature is critical (I want to be alerted when CPU temperature is 90C)?
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4answers
188 views

PC power usage related to power supply

Not sure if this is the right place to ask such a question, but I don't see a more relevant place on stack exchange otherwise. So recently I've become kind of obsessed with becoming more efficient ...
0
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1answer
266 views

Processor compatibility and motherboards

I have a Intel DG965WH motherboard. I am looking to upgrade my processor. I've checked the "Supported Processor" list, and I've checked the compatibility tool. I'm still a bit confused because the ...
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7answers
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Software that will tell me my CPU's temperature? [duplicate]

Possible Duplicate: Good software for measuring computer temperature? Hi, What should my i7 920 temperate be under normal load? I have a gigabyte ex58 ud4p mb.
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3answers
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Making a 'Supercomputer', cheap? [closed]

Why supercomputers are 'supercomputers'? Well, they are nothing more than many 'common' cpus, gpus and ram connected together. Thanks my idea here. I take many cheap computers @ about 350-400$, with ...
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3answers
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How does xeon differ from regular processors?

Yes I know that Xeons are meant for server use, require different motherboards and you can have more than one of them in a box. But technically how is a Xeon processor itself different from a regular ...
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0answers
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Why did CPU clock speeds stop increasing? [duplicate]

Possible Duplicate: Has CPU speed already broken Moore's law? Additional Reading: Whats the deal with these new lower clock speed CPUs on Laptops? Can they still run apps well? Is a ...
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2answers
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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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1answer
1k views

Why would my CPU suddenly get much hotter than it used to? [closed]

I run an i7-2700K on a DZ68BC, which I've assembled about a year ago. I've used the stock Intel fan without additional thermal compound and it worked flawlessly ever since. I've had the Intel Desktop ...
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5answers
1k views

Can keeping my CPU speed at “high performance/turbo” all the time decrease its lifespan?

Can keeping my CPU speed at “high performance/turbo” all the time decrease its lifespan? And if so, what would be its expected route of failure if it does happen?
5
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1answer
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Does CPU speed slow down with age? [duplicate]

Possible Duplicate: Is the performance of a CPU affected as it ages? Even if we periodically cleared away all the dust in the CPU processor? And if so, what is the rate of slow-down? Would ...
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3answers
220 views

How to compare 2 CPUs?

I want to compare (not precisely, no accurate benchmarking, just the big picture) two CPUs, the one of my main gaming PC (built in Feb 2011) and the one of my newest PC (built last week). One has an ...
4
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3answers
327 views

Difference between programs compiled for different OS

On a compiled code standpoint what is the difference between a program compiled for one os vs another (Linux vs windows for instance). Doesn't the program run directly on the cpu? Or is it because the ...
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5answers
2k views

Can I upgrade my laptop CPU

I have Lenovo Ideapad Y510 with dual core 1.6 Ghz processor, 1GB ram, 160GB HDD. I want to upgrade my current cpu with any latest one like i3, i5 or i7 to get more speed but don't know if it is ...
4
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1answer
367 views

CPU Whine with USB mouse inserted while on battery

I have a Lenovo Thinkpad Edge E520 that emits a high pitched whine from the top lefthand area of the keyboard when a 2.4ghz wireless USB mouse is inserted. The sound is a lot louder while on battery ...
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4answers
985 views

Linux only recognizes 800Mhz from 2Ghz

I tried with Suse 11 (KDE), Xubuntu 11.10 and Lubuntu 11.10 and these systems only recognizes 800Mhz from my processor of 2Ghz! The utilities I used are: linuxinfo, sysinfo, "system profiler and ...