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

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Building a computer, no output from on board video after power up

My son and I assembled the whole computer including tower, motherboard, cpu + cooler, graphics card, memory, hard disk, monitor, keyboard and mouse. When we power it up, we saw nothing on the screen, ...
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2answers
141 views

CPU usage is 100% because of svchost.exe windows 7

It has been a while now since my laptop started being very slow and cpu usage is 100% almost all the time. I downloaded process monitor and below is the process details that is taking most of the ...
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1answer
80 views

Windows 8.1 x64 installation without PrefetchW Support?

I'm having Intel(R) Pentium(R) 4 CPU 3.00GHz Processor with 2GB RAM. While trying to install Windows 8.1 Pro 64-Bit i gave me an error saying that the processor is not compatible with Windows 8.1 Pro ...
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1answer
37 views

Adaptive per-user CPU quota/priority in Windows 8.1

We have a workstation computer in the office running Win 8.1 where multiple users remotely run cpu-intensive processes at the same time. The problem is that one user can hog the cpu making all ...
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3answers
192 views

Why is CPU performance calculated in frequencies instead of Mbit/s? [closed]

Why is CPU performance calculated as a frequency, instead of megabits per second? Frequencies are less common in computer terminology.
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3answers
46 views

What does the minimum spec mean in regards to CPU clock speed

Most software provide a minimum and/or recommended spec of hardware in order to the software. Within this list, we're usually informed of a clock speed for the CPU. For example, Visual Studio has, as ...
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0answers
17 views

Speed with multi-cpu motherboard

I'm looking at building a dual-cpu system, but I was wondering if there were any concerns with bottlenecks that I should be aware of since data is going to two different places now. I know that each ...
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0answers
51 views

CPU freezes during heavy processing : Asus Z97C in Linux Mint 17.1

I got a new rig with Asus Z97C, Intel-i5-4690k, Corsair Vengeance 8GB RAM, 128GB SSD, no GPU. I installed Linux Mint 17.1 (based on Ubuntu 14.04.1) on it. Now, when doing something processor ...
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3answers
71 views

What factors other than clock speed influence the performance of a CPU? [duplicate]

Having seen various people test powerful emulators on their computers, I have come to surprise hearing about how one CPU can have triple the clock speed but still have worse single-threaded ...
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0answers
12 views

What are the Physical differences between an AM2 and an AM3 CPU?

What are the physical difference/looks between an AM-2 and an AM-3 CPU/Processor. (Are the pins located differently, are they different sizes?)
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4answers
86 views

Random spikes to 100% CPU lasting several minutes, (intervals, duration, processes) W7 PRO Dell E6400

For the last month or so I'm plagued with often, yet unexplainable spikes to 100% CPU load. Usually then Task Manager shows one or two processes taking 50%+ of CPU (not always the same: svchost, ...
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1answer
33 views

Input not supported error in monitor after overclocking the processor

Hi please any help would be appreciated. Here is my PC specs AMD A4-4000, 4GB DDR-3 RAM, windows 8.1+ubuntu 14.04 My trouble started when i tried to overclock my processor by using the gigabyte ...
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3answers
58 views

Can I safely replace a CRT monitor running at (1024x768) with a 21" TFT (1920x1080) HD monitor?

My archaic CRT monitor has a resolution of 1024x768. My GPU is an Intel 82945g chipset, CPU is P4, 1GB RAM running Windows XP. I want to replace the CRT with a TFT which comes with 1366x768 ...
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2answers
56 views

Computer Randomly Powers Off. What's The Cause?

I upgraded my computer a month or two ago now and now every so often, my computer will randomly shutdown (and then restart after about 5 seconds). To clarify, it usually shuts down when coming out of ...
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1answer
21 views

How to tell if it's either the CPU or the Motherboard that is bad?

I have an Acer 5536 laptop that won't boot. I've already tested the memory modules and the hard drive and both are ok. The problem is that I don't know how to tell which one is the problem: the CPU or ...
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1answer
38 views

Wrong architecture or manufacturer - conflicting information [duplicate]

This is what I get from the set processor(Environment variable) command in 64-bit Windows 7: PROCESSOR_ARCHITECTURE = AMD64 PROCESSOR_IDENTIFIER = Intel64 Family 6 Model 58 Stepping 9, ...
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1answer
24 views

What is this logic component?

This is from http://www.cis.upenn.edu/~milom/cse240-Fall05/handouts/Ch05.pdf , slide 9. From this diagram, I recognize 0001 as the opcode or ADD. I recognize 011, or 3, as the source register and ...
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1answer
14 views

xfx750i support for intel pentium G3240

I have a XFX750i Motherboard and want to upgrade my CPU to Intel Pentium G3240, or Intel Pentium G3580. So my question is whether my Motherboard will support either of these CPUS??
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1answer
62 views

Which piece of hardware in my desktop is failing?

Almost 2 years ago I built a custom desktop. This week it seems to be becoming inoperable. It's a dual boot system capable of booting to Windows 7 or Windows 8.1. When I sat down at it the other ...
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1answer
45 views

What hardware is needed to support ECC UDIMM / ECC RDIMM

There are 2 types of server RAM's UDIMM unbuffered (or unregistered) ECC (Error correction) RDIMM registered (buffered) ECC memories. The main difference between them is that UDIMM are using CPU's ...
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2answers
51 views

Does MotherBoard limit RAM?

http://www.findlaptopdriver.com/hewlett-packard-09e0h-mainboard-specifications/ ^^ That page lists the specs of my motherboard. It says that it can support 4 x 240-pin DDR2 DIMM slots Supports DDR2 ...
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0answers
21 views

stopping windows from undoing overclock settings

I have managed to overclock my CPU from 2.5 to 3.0 GHz, my BIOS says so at the top. But when I load coretemp after windows boots, it says my CPU is only at the original 2.5GHz. Is this just coretemp ...
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1answer
36 views

High CPU usage on Linux

I have a process that is called gis taking 100% of the cpu (sub-cpu) on one server and 3 % on another similar server (running as HA-pair) All other servers have are using 2-3% of cpu as well Is ...
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3answers
4k views

How can manufacturers put the specs of overclocking speeds when the whole point of overclocking is it's not known? [closed]

Some retailers really play up the overclocking capabilities of CPUs. For example, in the advertisement for this Intel Core i7-5820K processor, it says it can be overclocked to 3.6 GHz. How is that ...
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2answers
110 views

Laptop shut down randomly when temperature is low

Basic info of my laptop: 3.5-year-old Samsung RF411, Win7, no hardware change since purchase, Windows disk & memory check all OK, passed memtest86+ test. Recently, it randomly shuts down/blue ...
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0answers
22 views

Why does sensors-detect only see my coretemp-isa-000 adapter?

I am running Kubuntu 14.04 with an intel i7-4790k cpu and ASRock extreme 6/ac motherboard, but sensors-detect does not give me anything but the core ISA adapter. I know I can sense fan speeds on the ...
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0answers
47 views

How do I identify counterfeit hardware?

A peer recently told me to be aware of counterfeit Intel CPUs. I built my PC just last year and now I’m afraid I might be affected. How would I discover counterfeit hardware? My PC: GPU: Asus GTX 780 ...
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2answers
84 views

Going silent: will an SSD with a newer but 'slower' CPU run as fast? [closed]

I currently have a relatively old (2009) Shuttle XPC with an AMD Phenom X2 550 3.10GHz and 2 SATA HDD drives. I use it as my work computer, usually running a couple of browsers, XAMPP, 2 or 3 ...
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1answer
23 views

When MS offers a UPDATE choice between [x64 System] and [blank] are they talking about OS or CPU bits

When planning to install a UPDATE to repair a conflict the Microsoft knowledge base offers a choice of two types. Notably one intended [for x64-based system] and the other a generic [] this is CPU ...
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1answer
128 views

How to stop System Interrupts from eating up CPU

I have Windows 8.1 Pro N x64 on my Toshiba Satellite L505D-S5965 and there is a processes in Task Manager that is eating up my CPU. It's called System Interrupts and it takes up 1%-29% of CPU Power ...
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46 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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1answer
51 views

CPU Load + Frequency per core in linux terminal?

I am doing scientific computing and I need to keep an eye on the cpu frequency and load of each core (there are 2 cores, on Ubuntu 14.04 w/ Gnome3). I can see the frequency with this bash script: ...
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24 views

Is my motherboard defective?

Last month I bought a new Esonic motherboard with intel G41 chipset and a 4GB DDr3 1333Mhz Ram and installed my old processor, Intel Dual core E2140 (1.6 Ghz, 800Mhz FSB ) in it. Now after starting ...
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1answer
35 views

Disable Badly-Designed Form Element

One of our suppliers has a badly-designed website. On this website, there is a HTML select tag which has, over the years, grown to over 10,000 options long. This is apparently enough to cause large ...
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1answer
38 views

BIOS Update Before Installing CPU

I finally got around to builing a (shiny) new machine. So do I need to update BIOS before installing the new CPU? New hardware components include, Motherboard: ASUS H81M-PLUS CPU: Intel Core ...
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1answer
39 views

Seemingly random reboot during OS installation

I've recently changed my mobo and as usually in this case my OS wouldn't boot properly(I got past login, then, after few seconds, reboot). I proceeded to fail-safe mode, backed up my data and begun ...
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2answers
40 views

High latency, High CPU Interrupts per second 60K/Second causing FPS spikes in games

CPU Profilling Screenshot: i.imgur.com/10ZJNN9.png LatencyMon i.imgur.com/KJbaS3p.png Battlefield Screenshot: i.imgur.com/chpYIjN.jpg Processes: i.imgur.com/wDOpxtq.png 1.3ms of execution time on ...
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1answer
75 views

My CPU claims it is 2.53 GHz but never reaches it. Why?

My CPU claims it is 2.53 GHz but never reaches it. I run CPU burner, and set c state limit to c0. All power savings are disabled and I set multiplier to 20T which is the only allowed turbo multiplier ...
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2answers
117 views

CPU fan speed not increasing while in game

I have a weird CPU fan issue - as long as I'm playing a game (Cities: Skylines), the CPU fan keeps spinning at the usual RPM while the CPU temperature starts increasing. As expected, the CPU overheats ...
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1answer
129 views

Why is my Lenovo G500 laptop computer running slowly?

The one I’m currently using is a Lenovo G500, Intel Core i7, 2.10 GHz, 8 GB RAM, 1 TB HDD, Windows 8.1 64-bit, AMD Radeon HD 8570M, Intel HD 4000. The problem: it is slow. It lags even if Google ...
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0answers
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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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1answer
39 views

what does CPU% means in `ps auxf` for processes with parent/child relationship?

When I use ps auxf to display process information with ASCII art process hierarchy. Processes with parent/child relation is listed as below. USER PID %CPU %MEM VSZ RSS TTY STAT START ...
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0answers
52 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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1answer
101 views

Intel Turbo Boost temperature safety limits? [duplicate]

I have read many posts about Intel turbo boost technology and I am still a little confused. I get how it works and I even went as far as turning it off but it didn't seem to do anything. When I ...
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0answers
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Which CPUs support TSX, with the erratum fixed?

With the discovery of a bug in the implementation of TSX, all CPUs designed before that discovery have the extension disabled via microcode. Half a year later, I haven't found much about new ...
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5answers
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Why does a CPU have a clock? [closed]

Is it not possible to design a CPU without a clock? Is the only reason is it necessary is to measure the processor speed? What are the other benefits of having it inside the CPU?
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1answer
37 views

VirtualBox is using more processors than allotted

I have a VirtualBox Windows VM configured to use 3 out of 4 processors (see screenshot), but when my computer froze (see description below) recently, I used top and discovered that the VirtualBox ...
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1answer
46 views

Processor and RAM [duplicate]

So, for the past couple (Around 8?) of years, I have been using a 1.6Ghz Dual-Core CPU( I know, it's terrible, I tried upgrading, but it's an AM2), with 4GB of RAM, I recently put in 4 more GB of RAM, ...
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1answer
42 views

CPU is weak, is it CPU or motherboard? [closed]

My laptop, an Alienware M17xR3 started to run slowly lately. What happens is that sometimes it runs well, and sometimes not, I did run 3d mark benchmark and while mostly I get low results it happened ...
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17 views

How to control the CPU clock speed? [duplicate]

I have an i7-3612QM@2.1GHz in a Dell Inspiron notebook and now running Windows 10 Technical Preview. The experience described below was also seen in Windows 8.1 previously. I have been monitoring ...