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

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Is isopropyl alcohol 90+% safe for cleaning copper heatsinks and processors?

I'm preparing to replace my laptop's CPU and I'm curious about using isopropyl alcohol on both the copper heatsink and CPU. Will I be better off purchasing some special surface purifier? Also, if I ...
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47 views

How do I use linux processor affinity to dedicate 2 cores to user1 and 2 cores to user2?

at first I wanted to dedicate 2 cores(4 threads) to one java PID, and 2 cores(4 threads) to the other. However the volatility of these programs makes me think that they will end up crashing and ...
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3answers
1k views

Compare Intel Processors - Quad Core vs Dual Core [closed]

I have customized hp notebook and I am a bit confused about processors. I prefer quad core since I will have lots of things running simultaneously, web browser, visual studio, ms-sql... But Dual ...
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2answers
118 views

What direction should the heatsink fan face?

My current setup looks like the following: Rear fan <----- Heatsink Fan <----- Heatsink Case: Arc Midi R2 Heatsink: Scythe Ashura with stock fan I've placed the fan so it sucks the air out ...
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12 views

I7-3630QM Processor clock ratings

I'm researching a laptop for college, and have a loose set of system specs. I found a laptop that meets most of the requirements with little or no modifications, except the processor isn't what I'm ...
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47 views

MemTest86+ bad adresses constant despite swapping sticks, processor/MOBO to blame?

(Sorry for the wall of text, but people seem equally critical of missing details) After about 2 years without trouble, I've been having issues recently with system instability, BSODs, random ...
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33 views

Laptop cooling slacking off

Recently i've ran into the problem that my laptop had collected too much dust inside and starts overheating in difficult tasks (i.e. games), this happens every half a year or so, as always i opened ...
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2answers
84 views

Will overclocking my chipset increase the performance of integrated graphics?

My AMD Radeon HD 5830 recently broke (overheated because the fan stopped working), and I am currently attempting to run games on integrated graphics, on my chipset. Many games are responding slowly, ...
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62 views

x86 i386 i686 amd64 i5 i7 archtecture processor confusion

I noticed those items x86, i386, i686, amd64, i5, i7, archtecture, processor from the web, from my own notebook, from book readings. But I am really confused by those terminologies. I try my best ...
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16 views

mITX Intel dh77df MB and i3 3556 setup not booting, fan comes on for 2 secs

So I was installing a new SSD into the machine. Worked fine then I booted again and it just stopped. ( I did see the mb spark up a little when i booted it ) I got a constant beep (manual says thermal ...
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1answer
43 views

How much memory is being used on the gpu by each PID?

How do I know how much memory on the GPU is being used by each process, CUDA compiled code using 1 processor, accessing 1 of 2 M2090 Tesla cards available on a 16 core node on an HPC? ...
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77 views

CPU usage 99% constantly

My computer is running windows 8, and suddenly started running slowly. When I open the task manager, it tells me that the CPU is using 99% - sometimes the disk usages jumps up as well. The strange ...
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47 views

Where can I look up the yet highest used cpu speed on my computer?

Is there a log where I can look up the yet highest performed speed of my cpu on windows 8.1? For example if I wanted to know if the cpu was overclocked at some point.
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34 views

How to detect a bottleneck in the system?

I run a Mathematica code which takes one hour to be finished. During this one hour the CPU never reaches the 100%. It reaches to 50% or around that. The CPU is Xeon e5-1650. Could it be that there is ...
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4answers
163 views

Slow Harddrive is Dragging the System

I have an HP Pro 3000 SFF running Window 8.1 Update 1 & Ubuntu 14.04 LTS. It uses an Intel G45s Chipset, a Hitachi HDS721050CLA362 500 GB harddrive, an Intel Core 2 Duo E8400 processor, and has 4 ...
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63 views

Is it possible for a computer to be too cold?

My computer runs about 25-27 °C, which is okay during Winter, because I keep the house at about 20 °C. I am a bit concerned that it might be too cold during the summer months and that condensation may ...
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17 views

Are there two seperated schedulers in major operating systems, one for processes and one for their threads?

Let's assume a process is given the CPU on a single-core CPU system by the scheduler and let's assume this process has 10 threads. Who decides which of the ten threads gets the CPU? In other words, ...
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147 views

Is it possible to replace the CPU on my Asus X200MA?

Ok so I have an Asus X200MA and I was wondering if it is capable of getting it's CPU replaced or if it's current CPU is permanent
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31 views

In Virtualbox, is it possible to change the emulated CPU name?

I have a Virtualbox VM running Windows 7. When I open Start -> Right click "Computer" -> Properties, I get the real CPU name and plausible CPU speed (not sure if it's exactly the same). Now I want ...
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2answers
52 views

Best practices for thermal paste for CPUs during maintenance

I built my PC my self with a Core i3 4130 recently. It turned out that I forgotten to apply thermal paste after a time so I "unbuilt" it and removed the CPU fan. There was a big round thing on my CPU. ...
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19 views

Why do I get better performance on VMWare when I enable all cpus along with adding cpulimit?

I'm curious but at the same time also would like to share my findings of the increased gaming performance in VMWare by enabling all virtual cpus and limiting the VMWare process with cpulimit ...
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1answer
118 views

Which CPU is expected to have a better battery life?

I'm considering the following two cpu models for my next laptop: Intel® Core™ i7-4700mq, i7-4500U processors I understand that the 4700 mq will give me much more computing power, and that the 4500u ...
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1answer
38 views

Replacing processor on a motherboard. Any restrictions? [closed]

When I replace the processor module to a compatable one with a motherboard, are there any restrictions that I should follow? I will clean install the os and don't need any of the data I have ...
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2answers
979 views

What is the difference between Pentium(number) and just Pentium?

I noticed some older CPUs are branded as Pentium(n) (Pentium followed by a number), but there's some relatively new computers on shelves that just say Pentium with no number. Are those processors ...
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1answer
21 views

Segmentation fault while installing any linux distro (or windows)

I'm need of a little help from you. I'm having troubles while installing any distribution of Linux (or even Windows) in a computer .. I never had troubles installing an operating system in this ...
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97 views

Is there a way to identify the busy (CPU-consuming) tab in Firefox?

Sometimes there's a nasty, guilty, CPU-hogging tab in Firefox that's maxing one of my CPU cores and making the whole browser sluggish. I'd like to find it and close it. Sometimes I get lucky, but ...
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162 views

HP EliteBook 8470p running extremely hot

(tl;dr; see my bold text) I've been using this HP EliteBook 8470p for well over a year - it has an I7 proc with 8gb of RAM and before ever turning it on, I swapped out the HD with a 512gb SSD. I was ...
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29 views

Can a hot PCI adapter slow down the computer?

Using the "watch sensors" command in Fedora, I see that while the temperature of the CPU's are normal (70 degrees at most), the PCI easily exceeds 90 degrees (celcius, of course.) Once the PCI gets ...
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22 views

Both cores run constantly at 100%

I run a dualboot Fedora/Windows 7 computer. It will work fine for the first ten minutes or so after booting, after which it is rendered completely useless and slow. CoreTemp gives that both cores ...
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1answer
54 views

Diagnosing Motherboard/CPU/ (most likely) GPU

OK, so I am trying to salvage my Mum's old PC for which she had bought a new power supply. After that it worked for a long time. After that time, it wouldn't boot (fans would come on very loud, power ...
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1answer
36 views

Difference between different hardware of computer of recent times [closed]

While searching for good desktop for software development I came across many configuration.I become confuse over different thing as I don't have detail knowledge of Hardware. Difference between Core ...
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32 views

CPU Clock, Hirens BootCD, Windows XP

I have an older laptop I am thinking of multiple uses for it. The laptop ran windows xp terribly slow so I did a fresh install of windows xp and it still runs terribly slow(yes i installed the correct ...
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34 views

How are CPUs so freakin fast

I am going through a book on C and it said "Write a program that counts from 1 to 300 million, printing the number only if it is a multiple of 100 million. Use a stopwatch for fun to time the ...
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41 views

RAM and CPU compared to mobo clock [closed]

I have a general question concerning RAM and CPU speeds compared to a motherboard speed. Motherboards have e.g. 100-133MHz clock. CPUs have some frequency multipliers and memories I suppose have some ...
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1answer
57 views

i7 (first-gen) running memory on 1066Mhz vs 1600Mhz - any performance loss?

I tried to read about this, like what is the actual difference, but I could not find any benchmarks or helpful posts. Most of them are simple placebo effects, like "oh my god the 1600mhz module made ...
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motor-like whine from CPU area

I have an odd sound coming from the area of my CPU. If i was to describe the sound I would say it sounds something between like a air filtration system for a fish tank when it has no water to pump ...
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3answers
513 views

What is the difference between the number of cores and the number of logical processors? [duplicate]

I have been doing some image processing on my computer using Erdas Imagine. Specifically, I am running a 5x5 median filter on imagery. I can specify the number of processes that occur simultaneously ...
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2answers
51 views

How specific is RAM to a CPU?

I am fully aware that you need to get RAM with a supported speed (1333mhz or 1600mhz in my case). However, must a CPU also support the RAM in someway I am unaware of. I ask because my RAM just ...
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38 views

Is it necessary to renew thermal grease on Acer AO722?

Did anyone renewed the thermal grease on the Acer AO722, there is a need to renew it on this laptop? If yes how can I know for sure that I should to do it ?
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Upgrading Old Hp Proliant DL180 Processor G1 [closed]

Can i update the HP Proliant DL180 Generation 1 Processor with: Intel Xeon E5405 (12M Cache, 2.00 GHz, 1333 MHz FSB) or Intel® Xeon® Processor 5130 (4M Cache, 2.00 GHz, 1333 MHz FSB) Is it ...
2
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2answers
102 views

Does my GPU finally needs thermal compound?

I have the following PC configuration and since September 2011 when I bought and assembled it the only maintenance I did was cleaning every fans with compressed air. SSD: Crucial RealSSD M4 128GB ...
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1answer
124 views

Why is my CPU heavily loaded?

Idle CPU load ranges 30-80%, when performing any tasks - 100%. problem in linux and windows. The computer is not dusty, model acer ao722, fan is working. Sensor shows initial termperature - 57 C, idle ...
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100 views

CPU overheats when display turns off

Since about a week I’ve noticed that my CPU heats up very badly as soon as the display turns off. I can't find any suspicious processes when I resume, but, if I leave the display off for more than 20 ...
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4answers
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Are CPUs more stable with one or more cores disabled?

I was reading this article, and I couldn't help noticing this: ...7003.38 MHz, with two CPU cores enabled and hyper-threading disabled. Does disabling some CPU cores & disabling ...
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41 views

How to force Grunt tasks to use more CPU cores

I am currently running Ubuntu 12.04.4 LTS and using Grunt along with various contrib packages for my build toolset. Among other things, I am using grunt-contrib-watch to automatically detect file ...
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1answer
31 views

How many web servers will I be able to run with a dual core processor? [closed]

This question is simple, do I need to have as many virtual machines as cores I have, or can I have more? I plan to use my current PC as server, it is a Core 2 Duo E8400 @ 3.0, 4gb DDR2 (could buy 4 ...
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46 views

Built a PC some months ago, facing automatic shutdown, temperature issue?

I built a PC some months ago, it worked fine, but now it's summer time and temperature is 45 °C here in Jaipur, India. When I start playing BF3 after 20-25 minutes my UPS starts beeping and system ...
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67 views

Hardware concerns for optimal ruby on rails development on ubuntu machine

I've been developing dynamic web sites using ruby on rails on a 5 year old mac mini which has been great except that it takes too much time -- 15 minutes or so -- to run my simple test suites. I ...
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47 views

CPU overheating on startup

I just built a new PC, and on startup in the bios it already shows my CPU overheating at 190 degrees. Can anyone explain what is happening? I have 4 fans, 2 in and 2 out. This is literally the first ...
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45 views

HP G60 notebook making high-pitched whining noise constantly

I've had this laptop for about 5 years. It has windows 7 installed. I had it repaired once a couple years ago. Anyway I always remember it making this high-pitched whirring/whining kind of sound when ...