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

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Incorrect CPU temp on AMD A10-7850 APU (Kaveri) on Ubuntu Linux 3.16 kernel

My machine has an AMD A10-7850K APU which runs very nicely. I installed Ubuntu 14.04 when it was released, however it launched with the 3.13 kernel which did not have official support for Kaveri ...
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131 views

Kernel Panic from overheating?

I believe my CPU is overheating which is causing a kernel panic and the machine reboots. It is an Intel 3612QE. I have changed the cpufrequtils scaling_governor to ondemand, conservative, and also ...
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71 views

Missing L1 cache characteristic

I wrote simple program (with help of Igor Ostrovsky's article 'Gallery of Processor Cache Effects') which supposed to examine levels of cache in my processor. According to Coreinfo provided by ...
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118 views

Troubleshooting processor upgrade, Paxville on Dell Precision 670

I've got a Dell Precision 670 with an XC837 motherboard and BIOS at version A07. I'm trying to upgrade this from using a single-core Celeron to a dual-core Paxville processor. When I install a single ...
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227 views

Asus Z97 Mark 2, i7-4790 getting CPU graphics to work

This is a new build. I've been trying for two days to get the CPU integrated graphics to work. The motherboard has a "displayport" connector which I have connected to my Asus PA246Q monitor, also ...
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36 views

Do the temperatures indicate my laptop healthy?

The temperatures of my Thinkpad T400 are: acpitz-virtual-0 Adapter: Virtual device CPU_0: +57.0°C (crit = +127.0°C) CPU_1: +56.0°C (crit = +100.0°C) thinkpad-isa-0000 Adapter: ISA ...
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136 views

system monitor showing 25 ghz cpu speed, could that have any bad effect?

http://i.stack.imgur.com/ZKl0f.jpg I have a water cooled system, but.... I dont hatve that kind of wallet to be able to pull that out. is anyone of you that had this problem?? what I want to know ...
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156 views

Process tree CPU history usage, process tree memory usage (aggregated) on Windows 8.1

This question is general for Windows OS, but I would like to see a software for Windows 8.1, since this is what I use. I'm looking for software, that will take a process tree (e.g. Chrome.exe ...
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57 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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240 views

AMD Phenom II X2 555 BE, core unlock suddenly not working?

I've had a Phenom II X2 555 BE for around 2 - 3 years. When I got it, I immediately core unlocked it with my ECS A880GM-A3 mobo, which makes it turn into a Phenom II X4 B55. A few days ago, I ...
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46 views

One Core Hotter and slower than others

I overclocked my Intel Core i5 3570K to 4.2GHz at 1.1V. It ran stably overnight on Prime95, but, while I was monitoring the core temps, they stuck within 45-55C with core #3 was always 3 or 4 degrees ...
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1k views

Windows 8.1 Process Migration Limits CPU frequency scaling

Summary: I've noticed that with Windows 8.1 on my laptop, running a single CPU intensive program does not cause the CPU frequency to scale to its maximum value. I suspect that this is because of ...
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152 views

Idle CPU and CPU Power-saving mode definitions

I have a presentation on CPU's and there's some stuff I want to clarify that's defined in many research papers that I'm not fully sure about. How can the CPU ever be idle? I mean as long as you are ...
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220 views

CPU i5 750 stuck at its idle multiplier. Even when used at max

My i5 750 seems to be stuck on the idle multiplier (9x) instead of the base speed of 2.66 GHz, even while loading using Prime 95 Configuration: i5 750 DP55WB desktop motherboard. 2GB DDR3 RAM PSU: ...
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343 views

Windows Explorer 25% CPU usage while computer is idle?

I am facing a problem with my Windows Explorer. I cannot figure out why this happens even if the computer is idle. When I try to run some games that are old(released before 2005), at first trial the ...
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36 views

Energy Lost on CPU Propagation Delay

I was wondering if anyone had some statistics about the average amount of energy that is lost on the process of propagation delay in moving a signal from one place on the CPU to another. I'd prefer ...
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114 views

Haswell power efficiency compared to Ivy and Sandy

After reading a few reviews about the Haswell CPU series, I concluded that upgrading from Ivy or Sandy bridge might not be worth it considering the limited power gain. However Intel does advertise ...
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227 views

CPU (?) Clicking Sound During Resource-Intensive Tasks

I just bought a new computer (Lenovo Yoga 13, with integrated graphics and SSD). Whenever I bring it out of sleep, or do something resource-intensive (such as heavy Photoshop work), I hear a scratchy ...
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153 views

Correct CPU Frequency in BIOS

One of the machines I have is a 10 year old one. I can't discard it due to some sentiment (Mom). Legacy board: Mercury 810e, 133 MHz FSB Processor: Pentium III Tualatin 1.2 GHz Observation: I see ...
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325 views

Alternative (cooler) CPU than a Intel Celeron M 420 1.6GHz?

I bought a broken Toshiba Satellite A105-S2101 laptop off eBay. It would freeze on the BIOS loading screen; I found out it was just a bad DVD drive. I replaced it and all is well, except it overheats ...
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227 views

Upgrading Core i3 540 -> i5 760

I have Gigabyte H55M-UD2H motherboard with 8Gb (2x4Gb) RAM and Radeon HD 5770 graphics. I am trying to upgrade my processor from Core i3 540 to i5 760 but the system won't boot; no POST beep even ...
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154 views

Display drivers have stopped responding and has recovered

I recently purchased this http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1723935&CatId=7182 I installed it and started experiencing some serious problems. When i do ...
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400 views

Dynamic/Static CPU Frequency Scaling

I need to manipulate frequency of each core in my I7 processor. There is a way to do it in Debian (http://wiki.debian.org/HowTo/CpuFrequencyScaling). But I want to do it on Linux Fedora and Window. ...
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192 views

Interpreting CPU BenchMark for Multi Core Systems

What is the standard ways (if any) to interpret the results of cpu benchmarking for multicore systems relative to single core systems? I am trying to compare the Passmark result of AMD 64 Vs AMD ...
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41 views

WPA shows NIC driver DPC fragment running for 232 milliseconds

I'm stress testing my UDP proxy on a machine with 8 logical CPUs. At around 14 thousand UDP clients, one of the CPUs (CPU 4) starts spiking and UDP throughput (as shown by Task Manager) plummets to ...
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27 views

where can I find intel opcodes

Where can I find all intel opcodes? I'm talking about actual values of cpu asm commands, 0s and 1s of the keywords such as MOV, JMP, CMP etc. Are they available to the public?
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48 views

PC shutting down every 30 minutes

I changed my graphics card and PSU today (went from 650Ti to GTX 770 and Thermaltake PurePower 430W to OCZ GameXStream 600W). I plugged these components in, at first I didn't fit the 20+4 pin ...
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30 views

What is the relationship between PMU and PEBS for intel CPU?

I know for intel CPU families, there are PMU (Performance Monitoring Unit) and PEBS (Precise Event Based Sampling). What is the relationship between them? Per my understanding, the PMU contains PEBS, ...
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56 views

Does the ASUS P7P55D Motherboard support the 4th generation Intel Core i5 processor?

I have a PC I built based on the ASUS P7P55D motherboard. Currently it has an Intel Core i5-750 LGA1156 processor in it, a 3rd generation processor. I just found out that to run the Intel RealSense ...
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58 views

Need illustrated advice on Socket P/Merom BSEL mod

I have got Intel T2370(133FSB/Socket P/Merom) CPU and ASUS F5SL(SIS chipset) laptop. I see those as perfect candidates for BSEL pinmod yet I can't find detailed sure description on how to do it. ...
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35 views

how to check list of application running in core in windows 7

I need to know list of application (.exe) running on single core (cpu) in windows for e.g cmd.exe (application) is running on 2th core
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90 views

Asus motherboard with 'CPU_LED' on

First, Here are some pictures of what I'm seeing. Here is by build: CPU | AMD FX-8320E 3.2GHz 8-Core Processor CPU Cooler | Silverstone AR03 81.4 CFM Sleeve Bearing CPU Cooler Motherboard | ...
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135 views

HP laptop doesn't power up

I am kindly asking for your help. I have an HP DV7T-6C00 laptop which doesn't power up at all. I have read various forum threads and they did not solve my problem that's why I'm opening a new one. It ...
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140 views

What is Prime95 benchmarking?

I've recently had to benchmark the CPU performance of a variety of operating systems on identical machines. I've been using the 'benchmark' functionality of Prime95 to obtain a consistent test. I've ...
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84 views

Should you worry about high voltage and wattage on a non-overclocked computer?

I've been wondering if I should be worried at all about high wattage or voltage on a non-overclocked computer. I say non-overclocked because when I Google search this question or something similar it ...
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19 views

Show all running tasks in Assembly

Is it possible to show/log everything what the CPU does? The CPU knows what it executes, so it could print the running threads/tasks on the screen or in a file.
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233 views

Should the CPU usage go up to 100% when swap happens on Linux

I had been running a demo system on Linux with the following kernel: 2.6.32-400.1.1.el5uek #1 SMP Mon Jun 25 20:25:08 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux And as soon as swap happens, the CPU ...
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26 views

Can I install an AMD Turion X2 64 RM-70 on a Toshiba Satellite L505D-SP6983R?

The original processor was an AMD Turion X2 64 RM-74 (dead) The board is named V000185220 Rev 1.10 This board accepts S1G2 processors, and should accept the RM-70. But I am not so confident when ...
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396 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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33 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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237 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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232 views

Comparing an i7 (3.2Ghz) against an i5 (2.5Ghz) using linpack shows the i7 being worse

I am trying to compare the number crunching performance of an i5-3210M @ 2.5GHz with 6GB ram and an i7 970 @3.2GHz with 24GB ram. The results are so unexpected I presume I am either doing something ...
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425 views

How do I underclock my Macbook AIR?

When my MacBook gets below 1% battery life I believe the CPU slows down. The battery indicator states I have 10 minutes left but those are the longest 10 minutes in the laptop cycle. Is there a way to ...
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38 views

minimum allowable CPU speed

How can I determine the minimum allowable speed for my CPU to run the computer. Having the option to reduce the CPU to 0 is not logic nor allowable in Win8. Even if you set the Max. processor ...
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22 views

Resource balancing between users?

I have a cluster of Linux computers that are shared by many users and want to ensure that no user can flood the systems and effectively prevent others from running anything. i.e. If user A is running ...
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397 views

Does VLC Player run on multi core machine?

I notice that in the VLC web page, it mention that it can: With faster decoding on multi-core, GPU, and mobile hardware and the ability to open more formats, notably professional, HD and 10bits ...
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138 views

Why Skype consumes huge percentage of CPU?

I have searched this a lot using Google. I have found numerous people having the same problem as me, but I could not find any good answer anywhere. That's the reason I am asking it here as well. ...
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24 views

Replacing an cpu in a laptop

My machine is Lenovo G580 with i3-3120M. I want to replace it with i5-3360M. I checked on Intel's website that sockets are the same (PGA), TDP also the same (35 W) and BIOS works with both. I found ...
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259 views

Is my FRX780M motherboard compatible with AMD FX -8350 cpu??

Is my Acer FRX780M motherboard compatible with AMD FX -8350 cpu?? Do i need to upgrade my motherboard BIOS also? And if someone wants they could tell the process of changing to new processor..
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147 views

Relation between a memory map and address space in the architecture?

I will just post some quotes about each of these two from somewhat reputable sources: CPU address space from techtarget: Address space is the amount of memory allocated for all possible addresses ...