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

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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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6answers
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CPU Fan is Loud, but the Temperature is OK (I Think)

I recently find that my CPU fan is getting louder and louder. It is now so loud that I bother to type up a question on it. The first thing I check is the temperature using Core Temp, it seems that ...
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1answer
6k views

How to allocate more processor power to my (Ubuntu-based) Virtualbox system in Windows 7?

I have installed an 32-bit Ubuntu based Linux OS, Elementary, on a VirtualBox installed in Windows 7 (32 bit) , on a 64-bit laptop which has a 2-core Intel i3-2330 CPU @2.20Ghz, and 4GB RAM (2.45 ...
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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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4answers
2k views

CPU usage jumps to 100% -> WHEN <- machine is idle (not the idle process) [duplicate]

Possible Duplicate: Task Manager shows 100% CPU utilization, but nothing in process list does. My friend has a machine in his teashop that I am attempting to troubleshoot, so far with ...
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2answers
5k views

Does a motherboard have to support 64-bit or is it just the CPU?

Do I need to have both components to support 64-bit, motherboard and CPU. Or is it just the CPU that matters?
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1answer
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ubuntu: amd64 vs i386?

cant understand what these are even though i've read articles about them. does it has something to do with 32 bits and 64 bits CPU? so why is it saying "AMD"64 and "I386"? AMD is a label just like ...
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How fast is each core in a dual-core processor?

My Macbook has a 2.4 GHz dual core processor. Because it has two separate cores, that means it can execute two functions at once, right? So does that mean each core is approx. 1.2GHz each (for a ...
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3answers
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CPU temp very hot in BIOS but okay in RealTemp/Speedfan

I just built myself a new i7 2600k system with an Intel DP67BA motherboard. Booted into BIOS and was alarmed to find Processor temp reported at 75 C, and steadily rising... sat there while it rose to ...
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2answers
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Why does my Intel CPU underclock itself automatically?

I have an Intel i3 350m and a Core 2 Quad 8300. The 350m is 2.2ghz, while the Core 2 Quad is 2.5ghz. With both, while looking at CPU-Z, they underclock themselves at seemingly random intervals (even ...
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2answers
295 views

Game drops to 0 FPS and CPU Usage drops to 0%

So for about 2 weeks now I've experienced a problem while gaming. My frame rate would drop to 0 and my computer's CPU Usage would drop to 0% at the same time. This would stay this low for up to 30 ...
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1answer
2k views

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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1answer
1k views

How do Intel HD Graphics from 2010 processors compare to current low level graphics cards? [closed]

This question is similar to this, but here I'm asking about Intel HD Graphics integrated into 2010 processors in general and graphics integrated into Atom N550 in particular. A site with reviews ...
3
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2answers
197 views

Which property of CPUs is good for what?

Back in the days clock frequency used to be THE criteria to compare CPUs (or perhaps you had to take into account whether it was a DX or SX). The world was simple back then, but in these fast evolving ...
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1answer
30 views

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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3answers
9k views

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
4k views

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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3answers
6k views

What's more harmful to a CPU? High load or high temperature? [duplicate]

Possible Duplicate: CPU usage at 100% for several hours Is it ok to have 100% CPU usage constantly I wonder which case is more harmful: high percentage of usage (>90%) vs high temperature ...
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1answer
1k views

Will Ivy Bridge Xeon's be compatible with Sandy Bridge motherboards?

I'm putting together a new server. I'm looking at the Xeon E3-1270 processor. I see that the the new ivy bridge line is coming out next week. The ivy bridge version of this chip will be called Xeon ...
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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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2answers
979 views

CPU Core Temperature Variation

I have a brand new laptop with an i7 2630QM CPU. Core #3 (Out of 1-4) always has a temperature 3-8C cooler than the other cores under normal operation. If I put 100% load on the core then it'll go up ...
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1answer
44 views

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
254 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
2k views

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
201 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 ...
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2answers
5k views

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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1answer
715 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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1answer
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i5-3210M to an intel i7-3610QM?

If i want to upgrade my processor in my laptop from a i5-3210M to an i7-3610QM what else, if anything would i need to change? They both have the same sockets, I"m thinking i might need to upgrade the ...
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1answer
18k views

Msconfig -> Boot.ini -> Advanced Options -> Number of Processors

Are these the number of the processors used for boot time or the cpu cores? Also, what's the default value and what would happen if I activate the max number of processors on the drop down list?
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3answers
337 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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1answer
33 views

Video card error: Driver or Hardware?

Last night, I came home to find that one of my screens on my PC was grey with loads of white lines through it. I had to force it shut down, and I saw the error "Video Card Error". I have the new AMD ...
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1answer
50 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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2answers
195 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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2answers
634 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 ...
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2answers
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Relationship between RAM & processor speed

RAM is just used for temporary storage. But since this storage is in the cpu memory (RAM) it is fast. Programs can easily read/write values into it. I've noticed more the RAM less time it takes for ...
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11answers
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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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5answers
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Are CPU clock ticks strictly periodic?

Is the frequency of a CPU a mean value of about how many clock ticks there are in a second or does it have a more strong, physical stability? In my opinion, it must be not stable nor unstable. So ...
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1answer
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Intel Dynamic Platform and Thermal Framework Settings - what exactly do they do?

Despite the fact that virtually all modern Dell laptops (and probably others) are supposed to have the Intel Dynamic Platform & Thermal Framework Driver installed, I couldn't find any end-user ...
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10answers
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Why aren't all CPUs 'overclocked' as a factory default? [duplicate]

Possible Duplicate: Why are modern CPUs “underclocked”? When I was searching around for a desktop awhile back I came across a lot of discussions where techies talked about ...
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3answers
3k views

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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2answers
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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
6k views

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?
18
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5answers
10k views

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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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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1answer
279 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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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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2answers
26k views

What happens if I use RAM of a faster speed than the CPU supports?

Looking at the Intel E3-1230v2 CPU, under Memory types it says "DDR3-1333/1600". My question is, in what way does the CPU limit the RAM speed? What would happen if I put in a DDR3-2133 RAM chip ...
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4answers
6k views

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
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What is the difference between CPU and Microprocessor?

What is the difference between CPU and Microprocessor?