Questions tagged [cpu]

The part of a computer responsible for performing computations, often referred to as a processor.

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3 CPU on 4 socket mobo - any gotchas? [closed]

got a 2U Supermicro server with 4 sockets, however only 3 are populated with Xeon E7-4830v4. Various persons advised to either remove 1 or even better add another CPU so I run an even umber of CPUs. ...
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CPU fan stops when Windows starts

After I cleaned up its wings (I do it every several times a year), my (Fujitsu Lifebook ah530-10) laptop's Cpu fan stopped spinning when windows 10 start. It does spin while in BIOS pages and also ...
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dose tune of the kernel parameters can help to decrease the queue of CPU ( low cpu load average )

We have a machine with 32 CPU. For now the results from uptime ( load average ) for 1 min - 23 for 5 min - 21 for 15 min - 20 We notice when the values are small, like ~3-8, the application ...
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67 views

CPU LOAD Average + when to set when threshold

We have a cluster with physical machines HW Each machine contains 32 CPU # lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): ...
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4answers
330 views

Possible to replace CPU fans?

I have an Intel CPU that is about 5 years old and the integrated fan is whining. Is it possible to replace just the fan, or will that be problematic? The numbers on the fan are: E21984 DTCAAU01 ...
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start /affinity parameter not work on ffmpeg in some situation

I want to use start /affinity to reduce cpu usage of ffmpeg, but it doesn't work in some situation. This will work: start /low /affinity 1F ffmpeg -i a.mp4 b.mkv This will not work: start /low /...
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133 views

Gives TSX-NI an advantage for running virtual machines? [closed]

My question is about CPU architecture and the instruction set extension TSX-NI. For which usage scenario is it useful, and especially is it useful for web development or running virtual machines and ...
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2answers
233 views

How to connect the CPU fan on an ASRock X470 Taichi motherboard?

I'm not sure how to connect the CPU fan to an ASRock X470 Taichi motherboard. There are two cables with similar female sockets: Cable "1" comes from the CPU fan. Cable "2" comes from a small circuit ...
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1answer
1k views

Intel Core i7-8550U, Turbo Boost not working?

I have new HP Elitebook 850 G5 laptop with Intel Core i7-8550U which has TurboBoost up to 4.00GHz and base frequency 1.80GHz. However when i put the CPU under stress test firstly the frequency jump ...
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66 views

Do Windows 10 reset most basic environment variables if lost?

We have all seen the story of the person deleting their path variable and not being able to use their computer like they used to. But the path variable is really something that can be fixed and ...
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1answer
63 views

Should I expect adding more RAM of the same model to lead to worse benchmarks?

I bought 4 2x16GB Corsair Vengeance 3200 LPX kits thinking this would be the same as buying 1 128GB kit. I seemed to have lucked out in that my motherboard (ASRock x399 Fatal1ty) can use all 128GB at ...
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How does a 7 year old CPU compare with a 2 year old CPU? [closed]

I'm running a 7 year old MacBook Pro (one of the first retina ones) as my main work PC. I pimped it out with 16GB RAM at the time and used it for video and photo editing for a few years before ...
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1answer
541 views

How do I enable hardware virtualization on ASUS M5A78l-M motherboard, AMD 8350 Processor

How do I enable hardware virtualization on a ASUS M5A78l-M motherboard. I've tried looking through the BIOS but I can't find the settings what they are usually under, and I have read that this ...
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Dell XPS L502x - thermal pad cracked

I opened up my XPS L502x recently to re-paste the thermal paste on the motherboard, and there was a grey thermal pad over the Intel integrated GPU (not the NVidia one) that cracked and part of it was ...
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164 views

Udev rules' not working with 'ATTR'

I want to change my cpu's hwp_dynamic_boost option in /sys. I added ACTION=="add|change", KERNEL=="cpu", ATTR{intel_pstate/hwp_dynamic_boost}="1" to /etc/udev/rules.d/99-Performance.rules. It won't ...
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Can Low Memory on a Computer Cause in More CPU Usage?

From my last question, another question emerged in my mind. As mentioned there, having low memory causes the operating system to use page-file in Windows, also having low memory causes services like ...
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459 views

How to throttle CPU on a Mac?

Device: MBP 2015 I want to throttle CPU so that I can extend the battery life on a single charge.
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1answer
52 views

Virtual server vs Physical Server?

Read the difference b/w virtual and physical server It says The resources and components of a physical server are not shared between multiple users. Consider two (4 core and 8 GB) virtual ...
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54 views

Optimal CPI calculation confusion

I am reading https://insidehpc.com/2017/07/cycles-per-instruction-matters/: For example, if a certain part of the code takes 1200 cycles and executes 600 instructions, then the CPI would be 1200/...
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57 views

Does RAM have any kind of controller in it?

I have a problem understanding it (maybe it's a language barrier and/or lack of good articles in my native language). Let's consider a casual consumer PC. So there is a CPU. Nowadays the CPU has a ...
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1answer
31 views

Nearly new computer build not working after 9-months no use

I bought a computer probably about a year and a half ago now and due to some unforeseen extensions in military training, I have been away from home for about 9 months. Well I came back home to visit ...
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35 views

Creating vCPU to physical CPU?

Say I have 8 core physical CPU system which supports hyperthreading which is mapped to 16 vCPU. Is it possible to configure increase or decrease the vCPU to 24 vCPU or 12 vCPU or this setting/...
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234 views

How many threads can I run in my program?

I have a python program that uses the threading module and runs multithreads that executes a function. The number 8 below is the number of threads in the program but I need to know what is the number ...
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1answer
18k views

AMD fTPM - What does this firmware option do?

I have ASRock X370 Professional Gaming (AM4) motherbord with Ryzen 7 CPU. It has network firmware upgrade option, but I had to disable fTPM to enable network flash option. What exactly is fTPM option?...
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My AMD APU consumes less power running a CPU and GPU stress at the same time than a CPU test alone

I was stress testing my media PC, which is running fairly old hardware... A8-7600 AMD APU (Kaveri) 8 GB ram Asrock F88A MiniITX motherboard 1 GB SSD drive Antex ISK 110 computer case with a 90 watt ...
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41 views

CPU fan stuck at 1050 RPM no matter what

Today I ran intro a problem that I can't seem to solve. Specs: I7-8700 Asrock B360M-HDV Today when I turned on my PC I noticed my CPU fan is stuck at 1050 RPM (the stock one), if I change the ...
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124 views

High CPU usage - seems to be in the function DefPortWriteAcpiRegister in ACPI.sys

I have been struggling with high CPU usage for a pretty long time, the issue happens when I do a full reboot of my laptop (a DELL Precision M6800, Windows 7, 64bits), it happens in the ACPI.sys ...
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28 views

Tried nearly everything to fix my overheating PC, not sure what to do

I own this laptop: https://compareindia.news18.com/specification/laptops/hcl-me-xite-m-2035-b/270022 Using it for 5 years, ran without any problems, until about 3 months ago, where it gradually ...
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218 views

HTML5 | Why the Firefox is so slow compared to Chrome?

I am on my laptop just contemplating on transitioning one Flash game I play that is currently available in HTML5. I'm having a difficult time comprehending why the Firefox is so slow compared to ...
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46 views

How do I find the process that is killing my CPU?

My grandfather was recently throwing out an old laptop that he didn't use anymore because it was broken. It was a pretty good laptop too; an EliteBook with 8 GBs of RAM, and an i7 core, and Windows 10 ...
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How is it possible to use a RAM module that works at a higher clock frequency than what is supported by the MMU?

I remember many years ago when Intel finally moved the memory management unit from the north bridge into the processor itself in their newer Pentium and Core architectures. When I was building one of ...
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Why does my mac lag even when it says CPU load is 80% idle?

If you add up all the processes in Activity Monitor it probably adds up to over 100% a lot of the time, but the CPU load always says system is about 7%, user about 10-15, the rest is idle. kernel_task ...
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How do I determine the component responsible for hardware lockup under high stress on a Linux system?

I have a computer that I would call "rock solid". I run it for months on end without the need to restart and have many programs, tabs, etc open all the time on multiple work spaces. No stability ...
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1answer
67 views

Does BIOS need to be loaded into main memory to be executed by CPU?

Wikipedia says Originally, BIOS firmware was stored in a ROM chip on the PC motherboard. In modern computer systems, the BIOS contents are stored on flash memory so it can be rewritten without ...
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CPU upgrade on a Dell Latitude E6400 results in in a dead system

I have recently bought a Core 2 Duo T9900 for my Dell Latitude E6400 laptop, after having read the following Dell community thread. Unfortunately, I obtain a blank screen after pressing the power ...
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computer won't power on after using 24pin to 6+4pin cable

my computer (HP Compact 8200 CMT) was working fine, then i decided to added a graphic card, but the graphic card that i bought needed a 6pin power supply and more Watts and i had one from an old PC, ...
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How to update BIOS on computer that won't boot up?

My son is building his first PC with my assistance, and we're running into an issue where the PC will not boot up into POST. No signal on monitor, no beeps or POST codes. CPU fan and system fans are ...
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1answer
74 views

Max fan speed and inaccurate thermals after liquid metal (LM) for CPU and GPU, and new SSD

Been having heat issues with Razer Blade Pro 2016 (GTX 1080) for a while. Would get warm and fans would speed up just installing stuff; had to play games at medium settings; would shut off at 4K and ...
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222 views

Asus Maximus XI Code stops with Q-Code 10 (“PEI Core is started”)

This is my minimal setup, that I can't get to work: Asus ROG Maximus XI Code Intel Core i9-9900K Fury HyperX DDR4 2666, listed on the Memory QVL be quiet! Dark Power Pro 11 750W Corsair H115i RGB ...
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120 views

Determine which host CPU cores are assigned to a VMware virtual machine?

I have a 12-core CPU (logical cores) on my laptop and I'm running a virtual Windows 7 with 4 cores allocated. While performing some regular tasks in the VM, I spotted this CPU usage and I consider it ...
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How much CPU do I have left?

My Ubuntu 16.04 server hosts 4 processes, that run every 15sec, during about 10 sec. They hence require cpu on a periodic level. My server is a virtual machine made out of 4 cores (in fact a ...
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1answer
200 views

How to use slurm request for only one core instead of a node or socket?

I wrote Perl scripts to analyze my simulating data. This is not a concurrent program. In the cluster, there are eight nodes. Each of node has 2 sockets which possesses 10 cores. I want to submit my ...
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How to get CPU (or Energy) usage *history* of *an app* in MacOS?

In order to maximize my battery life, I want to find and get rid of apps that use too much energy/CPU or optimize them. I researched for 3 hours, installed various tools, tried CLI but couldn't find ...
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What would improve my laptops performance MORE, memory or cpu? [closed]

What would improve the performance of my laptop more? Specifically: Upgrading the CPU from: Intel® Pentium® Dual-Core T4200 1M Cache, 2.00 GHz, 800 MHz FSB (Code Name: Penryn) to either Intel® ...
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1answer
86 views

Why is my CPU usage constantly at 100%?

As soon as I start my PC and check Task Manager, I see the percentage of CPU usage at 100%. When I click on the Details tab, I see that idle process is at 93-99%. I know that the idle process runs ...
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Close chrome but still have chrome in task manager

when i close chrome i still have chrome in my task manager and it is using 50% of my cpu. The only way to end it is by pressing end process but it gets really annoying when you have to do it every ...
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59 views

Why did my laptop refuse to start?

I tried to upgrade my processor. The chip inside is: Intel Pentium Dual Core T4200, and I used this chip: Intel® Core™2 Duo Processor P8800 3M Cache, 2.66 GHz, 1066 MHz FSB (SocketP) http://www....
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1answer
38 views

Can a one-fan cooler handle the temperature of an i5-8600k? (Phanteks Evolv Shift case) [closed]

I'm going to make a build on a Phanteks Evolv Shift case with an i5-8600k CPU, but I totally missed what cooling system to choose for it In case of water cooling - there's a space only for 1-fan ...
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0answers
761 views

lenovo (p52) overheating, how one can fix that?

I found out, that my laptop cpu is overheating and stock fan can't do much about it. Some data: Idling, the cpu temperature is around 50°C and cpu is running at 800Mhz, while its max is 4000Mhz. Now I ...
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2answers
703 views

Emulation of a ARM Cortex M4 processor

Does QEMU support Cortex M4 emulation? Also the controller(hardware) I am trying to emulate is bare metal implementation ( FreeRTOS ), is it possible to implement such scenario in QEMU? or a OS image ...