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

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CPU reaching 98C when using Google Hangouts

When idling my laptop is 45 - 50C, when browsing it is 55 - 70C and when watching HD videos it is 75 - 87 and when doing a hangouts call (with HD on my webcam) it is 93 - 98C. The laptop is very loud ...
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1answer
686 views

Does a CPU clock frequency vary on-demand?

On my machine (not a personal computer), I have 4 cores (2.4GHz) and I currently don't have any important process running. Right now, are all of my 4 cores running/vibrating at 2.4GHz or are some of ...
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1answer
23 views

High cpu usage by 'root' in Ubuntu VPS server

My server was working fine until last week. But I don't know how someone have changed by ssh root password. After that when I checked the CPU usage, it always 160-190% on executing 'top' command. Some ...
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1answer
23 views

CPU performance growth stagnates

I looked at this diagram and I am wondering me that the increasing of the CPU performance seems to stop although the transistor count is still increasing. I mean what are the profts of the increasing ...
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1answer
13 views

AMD970 Hardware Compatibility Issue

I'm out of finals and now trying to design and build a computer. And I am making some progress. Here's the problem I am running into during the design. I was going to ask the same question this guy ...
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6answers
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Can I remove and put back the heatsink of my processor without reapplying thermal paste

If I remove the heatsink from my processor temporarily, then later put it back without changing the heatsink or CPU, do I need to reapply thermal paste?
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0answers
10 views

Custom Windows Power Plan Issue

When you create a custom power plan in Windows 10 using one of the existing power plans (High Performance, Balanced, Power Saver) as a template, are those power plan "templates" simply a grouping of ...
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0answers
20 views

Determine part/ model numbers & specs of Motherboard, Memory & CPU for network of PCs

Is there some easy way to pull this information from a network of PCs? To this individually on a machine here are the ways: How can I find out what motherboard is in my computer? ...
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21 views

How does the Raspberry PI deal with high or low temperature? [on hold]

I'm doing a research about how a Raspberry PI deals with high temperature and other threats to it's hardware. I've figured out, that there is an operating temperature range defined for several ...
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1answer
21 views

CPU upgrade - HP Probook 4540s and Mobile Intel HM76 Express

I have bought used HP Probook 4540s with Mobile Intel HM76 Express motherboard, with Intel Core i7 3610qm which needs 45W. My motherboard is providing 35W. On the HP Probook 4540s site this processor ...
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2answers
442 views

How is a shared memory bus used for reads and writes of data shared between threads safely and correctly?

I would like to understand at a high level how the shared memory bus handles multiple concurrent read and writes of shared data from multiple threads running in multiple processors? P.S: I do not ...
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0answers
17 views

Are there manycore ARM boards that can connect to the PCI express slots?

I have a program that runs on a cluster. But to improve power efficiency and reduce space utilization, I'm thinking of using ARM based manycore processors. It would be really cool if such processors ...
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2answers
35 views

How do you underclock RAM (with Gigabyte F2 UEFI)?

I've purchased an AMD A10 7850K with a Gigabyte GA-F2A88XM-D3HP and 8GB 2400MHz Corsair RAM for my computer. The problem is that the AMD A10 7850K doesn't support RAM at 2400 MHz, so I'm trying to ...
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1answer
44 views

Does a USB 4G dongle connected to a router perform differently to a router with a 4G SIM slot built-in

I think I covered the question in that beasty title but I'll give some background to the question. We are organising a charity LAN event and need a method of getting reliable Internet access via 4G ...
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1answer
44 views

Disable system cooling

When my PC gets a bit hot [?] I get lowered performance. To be honest, I don't really understand the reason my PC can run super-fast and after 15 seconds of stress it's running super-slow. It's a ...
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3answers
2k views

Chrome & Fan Speed

I'm on Windows 7 on my Mac via Bootcamp... I notice that the fan goes from 3000 RPM to 5000-6000 RPM when Chrome is running and most of the time it's doing nothing. The CPU in the task manager for ...
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1answer
47 views

I messed thermal paste and how to monitor CPU on a Windows XP?

I messed thermal paste between CPU and heat sink. I removed it and a good potion of it passed to my palm. Now what are my options? Is it safe to plug it in anyway and use it cause there is still ...
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2answers
11k views

High CPU usage of “NT Kernel & System” process while Chrome playing YouTube video

I have a headache from searching for solution of my problem. Everytime when I open Google Chrome and any YouTube video (doesn't matter if Flash or HTML5), system process named "NT Kernel & ...
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1answer
8k views

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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1answer
32 views

CPU cores remain offline after hotplug

When my UPS triggers an "on-battery" event, I want all cores to switch off to conserve power. The PC has 8 cores on two chips, UPS batteries need replacement every 3 months because of high current ...
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1answer
28 views

Understanding cpu usage

I have this simple code int main() { while (1){} return 0; } When I run this code on Windows, why is my cpu usage only 25%? Yet, when I run it on Linux, my cpu usage is 100% I have 4 cores ...
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2answers
2k views

Is there a way to reduce the CPU usage of a Gmail tab in Chrome browser?

This is driving me crazy and I hope you can help. Here's a screenshot of the issue. On the right, Windows Task Manager showing high Chrome CPU usage. On the left, Chrome's Task Manager showing it's ...
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0answers
17 views

What makes a CPU work hotter under the same conditions?

I have a couple of Lenovo x201 I found in a dumpster a few years ago. Both have the exact same specs, and both required a new LCD screens so I got two identical LCD modules for them. Usually I only ...
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1answer
24 views

Reenable Turbo Core MSI GX70

I was tinkering with overdrive on my MSI GX70 with windows 7. I tried fiddling with CPU cycles and it asked me do you want to disable the TurboCore, which it did. However, now I can't seem to turn it ...
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1answer
126 views

CPU core temperature high and cycling, @100% CPU load Asus Z170 Deluxe, i7-6700K

Update: Changed the CPU (with upgraded dual fan cooler) and different heatsink compound. Passes the Intel tests in Windows - but still hot and cycling in Ubuntu running stress or stress-ng. Has ...
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1answer
3k views

Upcoming Broadwell-E single-threaded performance in i7-6950X vs 6900K vs 6850K

According to various leaks ( http://wccftech.com/intel-broadwell-e-core-i7-6950x-price/ ) and ( http://wccftech.com/intel-broadwell-e-hedt-computex-2016/ ) the CPU frequencies of the upcoming ...
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2answers
33 views

How can I make Speedfan run automatically when the PC starts?

I tweaked the fan curve on my case fan because it runs at 100% when I am gaming. So I made it run at a max of 80%, which is MUCH more quieter, and it doesn't seem to have any impact on the max ...
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1answer
37 views

What are dangerous motherboard operating temperatures?

There are five motherboard temperature sensors for my PC, according to HW Monitor. Two of these, called TZ00 and TZ01, are always at 28C and 30C respectively, no matter what. I am inclined to believe ...
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2answers
31 views

PC Completely Freezes, Needs to Be Rebooted

I have a pretty old built PC that I was recently upgrading. I upgraded quite a few different parts so I'm not sure what was the thing that lead to this issue but now my computer reliably freezes ...
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1answer
139 views

Why is the 5960x Haswell and not Broadwell?

I was under the impression (and therefore very confused) that the 5960x was 5th generation and Broadwell, and that the 6960x would be 6th generation and Skylake (since they start with 5 and 6 ...
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1answer
39 views

What happens when putting very fast RAM in slower Mobo with slower CPU?

This is a dumb question and I'm a bit ashamed of having to ask but it's the first time I stumbled across it. Let's say I have an i7 5960X with support for DDR4 1333/1600/2133, an ASUS X99E-WS which ...
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1answer
64 views

Malicious Windows 7.exe file using all my CPU [duplicate]

My Problem I'm a Windows 7 user and to get it out of the way, Windows 7.exe is not a Windows 7 file. It's a smart virus that is using all my CPU. What I've Tried Every time I hit end process in a ...
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2answers
54 views

What are the ways I can improve airflow and reduce temperatures in a pre-built PC casing without investing in extra cooling fans?

Inside of my casing: Front/back/side of casing; Just want to know if there are any simple things for me to do to improve cooling and reduce temperatures without having to invest in a new cooling ...
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1answer
23 views

What is variable length instruction, What is its importnace in 32 and 64 bit OS [duplicate]

While reading about 32 bit vs 64 bit OS i came to know that there is instruction length varies from 32 bit to 64 bit. What actually it means and what is its importance?
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48 views

Are cores in a CPU package always identical?

By identical, I mean having the same signature - family, model, stepping and brand string of the CPU (which essentially identifies a CPU model uniquely) If I'm not wrong, a CPU package goes into a ...
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22 views

Change temperature at which fan turns on?

I own a Razer Blade Stealth. Absolutely love it. Sometimes, however, the CPU temperature shoots over 80 degrees C, especially when watching videos full screen. I have done some research and found it ...
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1answer
23 views

What is “Maximum Frequency”, why is it above 100% most of the time, and why is it so high when it should basically be idle?

Image of CPU according to WRM and Task Manager: The above image is what WRM reports my Max Frequency to be of my CPU. Why is it so high, and also why is the Speed on task manager higher than the ...
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2answers
54 views

Brand new laptop making an electrical sizzling noise when opening programs

I just bought the Acer V17 Nitro VN7-792G-705X. The processor is the Intel i7-6700HQ. I noticed that when I open a program, say google chrome, you can distinctly hear a sizzling noise coming from ...
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4k 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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1answer
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Is there a difference CPU Clock and Instruction Clock?

I am a bit confused between CPU clock and instruction clock. I brought the following figure from this source as illustration. Does instruction clock imply the time it takes by the cpu clock to execute ...
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1answer
247 views

Why won't my motherboard work with two CPUs?

I (very) recently built a computer with the following specifications: (x2) Intel Xeon X5650; Supermicro X8DTI-F Motherboard; AMD Radeon R9 280X; 16GB DDR3 FB 1333MHz RAM (4x 4GB); 1TB Seagate ...
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5answers
6k views

Maximum Processor Speed Lower Than It Should Be

If you look at the screenshot, you'll see that the processor should be running at 2.70 GHz, but the reported clock speed on the bottom right of the screenshot shows that the maximum processor speed it ...
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0answers
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combination of different RAMs while CPU only support the slower [duplicate]

I know that questions such as is it possible to combine rams of different speeds such 1333 and 1600 are abundant but what I want to ask is that: consider corei5-2410m cpu which its specs says that ...
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1answer
28 views

Slow VNC. Where's the bottleneck?

I have two computers in a LAN, one for leisure and one for hobby. The latter I connect to via Remmina VNC. This is what the desktop of the hobby computer looks like. The speed of my mouse cursor ...
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How to choose right cpu with difference sSpec & Steppings?

My motherboard is an ECS RC410-M2 (V1.0) In the CPU Section, Pentium D 900 series has several specs, and I bought Pentium D 945:SL9QQ BX80553945 D0 N/A 95 W with D0 stepping When inserted in my ...
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Changing the Interrupt Vector Table [migrated]

During one of my university lectures we were talking about hooking and the possiblitity to change the interrupt vector table (IVT). Our professor said that a program with root permissions is able to ...
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How to get statistics of CPU throttling?

My dmesg output says that the CPUs are throttled, because of the temperature. [ 1283.260276] CPU3: Core temperature above threshold, cpu clock throttled (total events = 1) [ 1283.260277] CPU2: Core ...
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37 views

First build: mobo lights up, but no CPU fan or monitor activity

I am having trouble booting up my first PC build. It uses compatible suggestions from Logical Increments, which include the following: Case: Cooler Master Trooper (Rev. 2) Motherboard: ASUS Z170 PRO ...
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1answer
29 views

Could my processor handle Windows 10 64 bit?

It's an AMD FX-4300, could it run Windows 10 64 bit? Or, I'd even settle for Windows 7 64 bit. Literally any kind of Windows 7 or up 64 bit.
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Intel Atom D2500, 64-bit mode

I have an Intel Atom D2500 processor which the spec site claims it supports a 64-bit instruction set. However, cpuinfo shows this: # cat /proc/cpuinfo | egrep "(processor|flags|address)" processor ...