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

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What are “hyperthreading” and “virtual cores”?

I'm new in this computer terms. So anyone can explain to me what "virtual cores" and "hyperthreading" are at greatest detail a layman can understand? People told me that virtual cores are imaginary ...
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3answers
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How to replace properly the motherboard and CPU on a Windows 7 machine?

I am going to replace the motherboard, CPU, and RAM of my Windows 7 PC (at home, this is not a server, of course). What is the proper way - relative to the software and not to the hardware, unless of ...
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3answers
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Intel turbo boost - in reality

I have an Intel i7-3630QM processor in my laptop. Its speed is supposed to be from 2.4 to 3.4 GHz in turbo boost mode. In reality, will it ever run all cores on full speed (3.4GHz mentioned above) ...
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1answer
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Can SMT give worse performance than normal CPU?

Is there any chance of SMT (simultaneous multithreading) having worse performance than normal CPU? For example, is it possible for a normal CPU to run two programs one by one and have better ...
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2answers
2k views

Troubleshooting an overheating CPU

I & my father just recently put together a new PC. Specs below. From the very beginning, on boot it will often complain that the CPU is too hot. If I sit in BIOS and watch the CPU, it'll drop ...
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What happens 'internally' on a unstable/overclocked/undervolted CPU?

When you undervolt or overlock an CPU, when it passes a certain limit it starts to make the system unstable, reboot, etc. But these are the effects of it. What I'm curious about is what happens on ...
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1answer
860 views

Will a CPU upgrade speed up my web browsing? How to tell?

My CPU model is 2 and a half years old now, released Intel Q4'2010. How can I determine if getting a new CPU will improve how fast I surf the Internet, versus getting a better ISP subscription?
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Upgrade laptop CPU from i3-330M to i5-whatever

I have a VPCCW2S1E with: CPU: i3-330M cpu Intel® NM10 Express Chipset. I'd like to upgrade it with an i5. (or anything faster!) I see my socket is either a BGA1288 or PGA988 and an i5 such as ...
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444 views

Why is my motherboard's CPU temperature inconsistent with the individual core temperatures? [duplicate]

This image demonstrates what I'm talking about: The motherboard's CPU temperature is in green. The individual cores' temperatures are in red. I've tested the temperatures in three different ...
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2answers
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What do I need to know before upgrading the CPU of a laptop?

I have an AMD laptop, which has AMD APU (e1-2500). I don't really like the speed of it and would love to upgrade to faster APU. There are some AMD APUs available in ebay. So the question is: What do ...
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2answers
211 views

Performance issue with my system

Recently while using my laptop (Dell XPZ15z) all of a sudden the CPU usage is spiking to 80-100% then will drop in say 5-7 sec. I am not running any application or process that requires such CPU usage....
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3answers
343 views

Should I overclock a dying PC?

I have a laptop (Compaq Presario V5000). It's about 4 years old now. My dad bought it at Walmart on Black Friday for $389 (it only had 384MB of memory (now it has 2GB)). It has seen 3 Windows OS's and ...
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2answers
3k views

How to Overclock a Dell Inspiron 531?

I have searched all over the web on how to overclock a Dell computer. I cant find anything about it. I am trying to overclock the CPU. My specs: Mainboard : Dell 0RY206 Chipset : nVidia 6100V ...
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3answers
596 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 ...
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2answers
781 views

Hyperthreading Calculating Load [duplicate]

I have a dual core core i5 with hyperthreading. Since hyperthreading allows for unused cpu time to be used by other processes, why would this make it seem like 4 logical processors (2 per actual core)....
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2answers
472 views

How can I stress test my system?

Apologies if this is a beginner question. I've just 'successfully' built a gaming PC myself, and everything works perfectly, apart from one thing. I keep getting this error when trying to sync my ...
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1answer
63 views

x86 live image on a x64 processor

I have a live image of ubuntu, and I will be using it for programming. It came with a book, and the book mentions that it has to be used on a x86 based-processor. I have an AMD64 processor, so my ...
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11answers
49k views

What's the difference between mobile and desktop processors?

I just read about the new Samsung Galaxy Note Edge having a 2.7GHz quad-core processor and 3GB of Ram. The laptop I bought last year by HP is 4GB of ram and 2.3GHz quad-core and my iMac is even ...
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8answers
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How to tell how many CPUs (cores) you have on Windows 7

I got me a nice new laptop and I want to know a bit more about the hardware. How can I see how many CPUs my computer has in Windows 7? (Note: Clicking on Start->Right clicking on Computer-> ...
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4answers
27k views

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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2answers
10k views

Difference between port mapped and memory mapped access?

Can anyone explain what's the difference between port mapping and memory mapping, and what having both accomplishes? Why is there port mapped, how does it differ in structure from memory maps, and is ...
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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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3answers
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Task Manager is saying the system is running with over a thousand threads

I opened up Task Manager and looked under the "System" area and saw: Threads: 1337 Since I have a dual-core processor with hyper-threading available (meaning four threads), how is it possible to ...
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What is a processor cache?

I recently downloaded CPU-Z just to check things out, and saw a tab marked Cache on it. It shows what appears to be different memory sizes, and I have seen processors being advertised with an X sized ...
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14answers
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Removing the CPU while the power is on [closed]

What will happen if I remove the CPU while the power is on? Does anything happen to the computer? Has anyone tried this?
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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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5answers
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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 well....
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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?
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8answers
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Choosing Dual or Quad Core [closed]

I was reading the Jeff Atwood post on this topic and was wondering how much of that is still true today. His post is from Sept. 2007. This question stems from another question I asked recently which ...
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1answer
283 views

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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2answers
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What is a PCI-Express Lane?

I am reading an article bemoaning i7-5820K Will Only Have 28 PCI-Express Lanes compared to its sibling processors having 40 lanes. Isn't 28 lanes already too many? How many lanes would a normal home ...
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5answers
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Very high-pitched noise when computer does something intense?

"Intense" is the best word I can use to describe it because I'm not sure what it is, whether it's RAM, GPU or CPU. If I pan the camera in unity: A high pitched noise issues from the computer. The ...
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13answers
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What are the benefits of a dual-core CPU over a quad-core in a desktop PC?

I know that in most cases when you buy a dual-core CPU for the same price you could get a quad-core, you end up getting 2 cores that are faster individually than the 4 cores individually in the quad-...
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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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What is the difference between CPU and Microprocessor?

What is the difference between CPU and Microprocessor?
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Why is my CPU usage broken in Process Explorer?

On my system (Windows 7), it seems that Process Explorer is reporting the wrong CPU usage: When Firefox is running, I constantly get 30%+ When I kill Firefox, I still get about the same CPU usage ...
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2answers
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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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3answers
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How is time measured in computer systems?

Something I have been puzzled about is this: how exactly does a computer regulate and tell time? For example: if I were to write a program that did this: Do 2+2 then wait 5 seconds How does the ...
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4answers
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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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Quad cores have lower processor speed, are they still better?

So, I am looking at building a new laptop. Two examples of the processors I am looking at are: Intel® Core™ i7-740QM Quad Core 1.73GHz 6MB Intel® Core™ i5-520M Dual Core 2.40GHz 3MB Now I realize ...
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1answer
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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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4answers
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CPU Temperature required for auto-shutdown

At what temperature do most motherboards/cpus power down to prevent damage? And what determines this? Is it the bios, the motherboard, the cpu itself? I have a cpu that stays on in the bios until ...
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1answer
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What do Intel's socket package specifications mean in detail?

What is the difference between FCPGA988 PGA988 rPGA rPGA988B BGA1224 FCBGA1224 Do some mean that the BGA is soldered to the board and cannot be removed? BGA is soldered versions only, right? ...
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5answers
909 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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2answers
2k 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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2answers
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Determine which CPU a process is running on

Using Sysinternals' Process Explorer, is there a column that can be used to indicate which CPU a process is running on? If no column, is there some other way?
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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 it....
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6answers
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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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Error “VT-x/AMD-V hardware acceleration not available on your system” while trying to run Virtualbox

I have to run Mac OS on virtual box for a class and it keeps giving me errors stating "VT-x/AMD-V hardware acceleration not available on your system. Certain guests (e.g. OS/2 and QNX) require this ...
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2answers
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svchost.exe using lots of memory slowing my PC down [duplicate]

On my Windows 7 32-bit. svchost.exe is using lots of Memory and slowing my PC down big time. I already have auto update turned off and it is on manual mode. How can I fix this problem? Thanks