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

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Has CPU speed already broken Moore's law?

I remember sometime around 1995 having a computer with CPU speed of 75 MHz. Then a couple of years later around 1997 having one that was 211 MHz. Then a few years later around 2000 having one that ...
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5answers
9k views

Is it dangerous to run a CPU in an extremely cold environment?

We are in a fish processing unit where the temperature is constantly at -10°C (+13F). If we use a machine in here, will it be at risk of damage from the cold? Is there any considerations we need to ...
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5answers
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Why is my dual-core CPU recognized as a quad-core one?

My processor is an Intel Core i3-380m. As you can see, it's 2 cores and 4 threads. Although, both Ubuntu 11.04 and Windows 7 seem to think it's a quad-core CPU: Why is this? Is it because there ...
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6answers
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What regulates Intel SpeedStep CPU throttling? Can I get some control of this on Windows7?

I’m trying to get a big virtual disk file compressed (using WinRar) before I go home today, but my CPU frequency keeps merrily going up and down between the nominal 2.8 GHz and a measly 800 MHz! The ...
25
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7answers
2k views

Why are modern CPUs “underclocked”?

I keep reading since years about magical overclockability of modern CPUs. It is said that CPUs (with open multiplier) which are shipped to customers with (let's say) preset 3GHz, can be overclocked ...
14
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2answers
2k views

Does the Intel i7 offer real improvement over its predecessors? [closed]

As the questions title asks, do the new processors from Intel offer real, as in noticeable, improvement over the previous quad core ones? What does the i7 actually offer that is new or is it simply a ...
10
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4answers
7k views

The difference between GPU and CPU

I know what a CPU is(I think). It's the thing who's speed is measured in GigaHertz(these days). However, you hear a lot about a GPU, and letting the GPU take over, not letting the CPU but the GPU do ...
7
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2answers
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How does Intel Turbo Boost work?

I just got a new Intel CPU, and the specifications say 3.5GHz but with turbo boost to 3.9GHz. What does Intel Turbo Boost do? From the description it sounds like they are saying "The road's speed ...
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3answers
2k views

Does anyone know the temperature ranges one can expect on a core2 duo

Some background. I'm having problems with my computer suddenly shutting down and then refusing to start unless I wait awhile. So I'm assuming it's a temperature problem. I installed SpedFan and it ...
2
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4answers
7k views

CPU temperature between 39-58C, Is It Normal?

I have an Intel Core 2 Duo E8400, this is the temperature information at light load: And this is the temperature at heavy load: Is this normal? On one hand I have a SU user says that this is ...
6
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10answers
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How can I determine whether my processor is 32-bit or 64-bit?

How can I determine whether my processor is 32-bit or 64-bit? My processor is AMD Phenom 8450 triple-core.
6
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1answer
530 views

What steps do you take when overclocking?

When overclocking your system? what steps do you take to get a maximum but stable overclock out of your system? I've personally just slammed up the FSB speed until my system can't run Prime95 for a ...
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3answers
8k 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 ...
16
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5answers
27k views

Can I remove and put back the heatsink of my processor without reapplying thermal paste

If I remove the heatsink from my processor temporarily, then later put it back without changing the heatsink or CPU, do I need to reapply thermal paste?
10
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1answer
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Core i3 and core i5 processors. What is the difference? What do I choose?

I'm in a dilemma to choose between Intel Core i3 and Core i5 CPUs. I'll be using Adobe CS5 applications along with some other multimedia tools and will be playing games with high end graphics. Will I ...
9
votes
4answers
27k views

basic difference between i5 and i7 processors? [duplicate]

Possible Duplicate: Core i3 and core i5 processors. What is the difference? What do I choose? I am planning to buy an HP desktop,all the features are nice as far as I know but it doesn't ...
6
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2answers
813 views

Intel Pentium D & Intel Core 2 Duo

Are the Intel Pentium D and Intel Core 2 Duo processors the same?
5
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4answers
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CPU makes an electric leak like sound

For a while my computer have been making a electric leak like sound whenever the CPU usage gets high. However, lately it started to make it more often. For example with anti-virus searches and malware ...
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4answers
4k views

Multi-core CPU: can I say I have a 3x2.1GHz=6.3GHz CPU?

I have an AMD A6-3500 three-core CPU. AMD System Monitor shows each core with a maximum 2100 MHz. This also shows in AMD OverDrive. Does this processor run at the speed 3*2100 MHz? Edit Can I say ...
3
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7answers
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How to fix the “Firefox using max CPU” problem?

Every now and then while browsing, my Firefox CPU usage shoots up to the max possible (that's 50% for my dual processor laptop). It remains at max usage even when I close all the tabs. In fact, the ...
2
votes
5answers
4k views

Whats the deal with these new lower clock speed CPUs on Laptops? Can they still run apps well?

I'm looking at some new laptops, and I'm seeing the AMD Neo CPUs at 1.5GHz, and some of the new Intels at 1.3-1.8GHz. The laptops they are on come well supplied in terms of RAM (up to 8GB) and Video ...
2
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2answers
3k views

Processor not running at max speed

My laptop has an Intel Core 2 Duo T9300 which should be running at 2.5GHz, however CPU-Z consistently reports my Core speed at right under 1.6Ghz (8x multiplier and ~200MHz Bus Speed). Even when I'm ...
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3answers
594 views

Upgrade RAM or CPU [closed]

I have an IBM X31 with 1GB of RAM and a 1.4GHz proccessor running Windows 7 Home premium. Which would be more worthwhile to upgrade, the RAM to 2GB or the processor to a max of maybe 2GHz? Thanx in ...
57
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9answers
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Why have CPU manufacturers stopped increasing the clock speeds of their processors? [closed]

I have read that manufacturers stopped concentrating on higher clock speeds and are now working on other things to improve performance. With an old Desktop machine with Intel® Xeon® Processor E3110 ...
14
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4answers
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What is meant by the terms CPU, Core, Die and Package?

Now this might sound like too many previous questions, but I am really confused about these terms. I was trying to understand how "dual core" is different from "Core 2 Duo", and I came across some ...
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4answers
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Is the CPU active in Sleep mode?

Suppose on a Windows OS, you toggle the computer to go into sleep mode and put it away. As far as I know there will no programs or processes will be running. But would the processor still be running ...
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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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5answers
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Why can't you have both high instructions per cycle and high clock speed?

The Megahertz Myth became a promotional tactic due to differences between the PC's INTEL 8086 processor and Apple's Rockwell 6502 processor. The 8086 ran at 4.77MHz while the 6502 ran at 1MHz. ...
13
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2answers
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Linux: command to know the processor number in which a process is loaded?

Is there any command in linux to figure out , given a process, which processor the process is running? I am interested in figuring out the CPU busy and CPU idle time of that processor.
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2answers
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Maximum CPU Temperature for Core 2 Duo E6400

What is considered to be the highest safe CPU temperature when overclocking? I have a Core 2 Duo E6400 overclocked to 2.85GHz with 1.2vCore. This runs at 29C idle and 45C under load. These ...
14
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5answers
3k views

What's the difference between multicore proc and multiproc system?

I wonder what's the difference between a dual core computer and a computer with 2 processors on the mother board.. I think it's something related with the threads but a I don't understand it very ...
12
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3answers
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What is meant by a 32 bit processor?

What is meant by a 32 bit processor, or generally an n-bit processor?
5
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2answers
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Upgrading laptop RAM [duplicate]

(This question was originally asked for my specific laptop: Dell XPS 15 L502X. But it seems that understanding I gained from the upgrade experience I am able help my friends to decide upgrading RAM ...
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6answers
8k views

Why is Google Drive so heavy on my CPU?

As the below screenshot shows, despite the fact that Google drive doesn't appear to be doing anything (it's not syncing any data) it's using over 12% of my CPU (a core i7). The official ...
3
votes
1answer
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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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2answers
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Safe long-term CPU temp? [closed]

I'm considering running a game server for some friends and I to play on with my laptop, but while the server is running my processor use tends to go to around 55-65% and my CPU temperature hovers ...
12
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2answers
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How to set “Process Priority” and “Process Affinity” on Windows 8?

On Windows 7 everything we must do to set "Process Priority"(to Low \ Below Normal \ Normal \ Above Normal \ High \ Realtime) or to set "Process Affinity"(to choose wich processor core would run ...
6
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1answer
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How do I get AVX support in QEMU?

I want to play with the new AVX instructions. I saw that QEMU might have support, so I built it from Git (yesterday). I set the CPU to SandyBridge and I booted Tiny Core Linux. TCL has kernel 3.0 and ...
6
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1answer
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How is the percentage of CPU usage calculated?

In my Ubuntu 12.04, with psensor, I saw a percentage number updated for cpu usage. I wonder how this percentage caculated? Specifically, what is the numerator and denominator in the ratio? Thanks!
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3answers
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Is my i7 CPU running too hot?

Here's my setup Intel i7 940 - stock speed 12GB DDR3 RAM ATI Radeon HD 4800 Series 2x 10k RPM Velociraptor Hard drives At no load, room temperature my cpu cores consistently read: 43 43 46 43 ...
4
votes
4answers
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How to see if turbo boost is working on I7 860 CPU?

I just build myself a new system with a Intel I7 860 CPU. When loading it using a single threaded application like Super PI, CPU-Z shows 2.933Ghz as speed. Now I understood that the I7 goes into turbo ...
14
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5answers
800 views

Are there seperate processors for Servers?

To my knowledge a Server PC and a desktop PC can have the same processor. But someone told me Servers are equipped with more powerful Processors (that is these processor are designed for Servers ...
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3answers
10k views

Can a single-threaded program be made to use multiple cores?

The title says it all: is there a way to get an older program designed to use a single CPU core to use multiple CPU cores?
9
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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?
3
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3answers
326 views

What's the relationship between CPU, RAM and performance?

I have an HP EliteBook Folio 9470m with an Intel Core i5 processor at 1.9GHz and 4GB RAM. Is it useful to buy an additional 4GB RAM memory with this CPU? Or would the extra RAM be wasted from a ...
3
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2answers
445 views

Is there any way to see what my CPU is doing at the “assembly level”?

I was looking at how Assembly Language works, because I want to learn how the complex and fancy things my computer does actually happen at the CPU register/hardware levels. Is there any way to see ...
3
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2answers
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Instruction per Cycle vs Increased Cycle Count

Increasing either instruction per cycle or increase cycle count both are valid design choice for processor manufactures. I understand theory, but it would be much clearer if I had some real life ...
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3answers
4k views

Why would my computer all of sudden reset clock, show new boot screen, and run fans loud?

I bought a new computer one year ago, it's worked fine (Windows 7). A few months ago, it started to not boot unless I removed my USB headphones connected to a USB hub, everything else worked fine. ...
2
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4answers
16k views

How to control the processor frequency of i5 in Windows 7?

On Ubuntu I can control the frequency of my CPU. I set it at the lowest value and then the fans are really quiet. Is it possible to do it in Windows 7 ? EDIT: The computer is a Laptop: Sony SVT 1311 ...
2
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1answer
318 views

Curios: What makes CPUs better than others? [closed]

I have been wondering about this for a long while now and was hoping someone here could answer it pretty easily. If I was looking for the most powerful CPU what should I really be looking at? There ...