Questions tagged [cpu]

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

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Is there a way to limit cpu usage per tab in Firefox?

Opening 20+ tabs in Firefox inevitably leads to a situation where 2-3 tabs are constantly using a fair amount of CPU, slowing the entire system down. I wonder if it's possible to impose a limit on ...
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1answer
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How does the Windows 10 scheduler deal with Hyper Threading since Core Parking is disabled by default for Intel CPUs?

I'm running Windows 10 (1607) on an Intel Xeon E3-1231v3 CPU (Haswell, 4 physical cores, 8 logical cores). When I first had Windows 7 installed on this machine, I could observe that four out of eight ...
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3answers
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No POST screen, No beeps and No display

I have very old motherboard , CPU , power supply. Motherboard : Gigabyte G31M-ES2C CPU : Intel Pentium Dual Core E2160 @ 1.8GHz Ram : Transcend 2GB ddr2 800MHz. Power supply : Tech-Com 450Watt....
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Microsoft Edge - High CPU Usage

Microsoft Edge has abnormally high CPU Usage on my computer, just upgraded to Windows 10. When I open cnn.com in it, it consumes about 50% of my CPU even after the page loads, for a SINGLE tab. When I ...
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1answer
602 views

CPU Whine with USB mouse inserted while on battery

I have a Lenovo Thinkpad Edge E520 that emits a high pitched whine from the top lefthand area of the keyboard when a 2.4ghz wireless USB mouse is inserted. The sound is a lot louder while on battery ...
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1answer
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Not an experienced user. New (2 months) Sony Vaio running slow as hell. 100% CPU usage, 100% Disk usage, cooling fans at full speed most of the time

I'm not too computer savvy so sorry if I'm missing something important or I say something dumb. I'm really frustrated and I'm trying my best to learn and solve this problem. So I bought this Vaio ...
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0answers
60 views

Mysterious CPU load without process

On my new Windows 10 Home Edition Dell XPS 15 7590 I have some background CPU activity popping up regularly without any obvious process causing this load. Even when the System Idle Process is at over ...
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579 views

Since upgrade from linux 4.6 to (4.7, 4.8), %CPU is always 0; the frequency is unknown

Since the upgrade to linux kernel 4.7 (Debian Stretch), it seems that my system (Aurora-R4 i7 3820) is a bit slower (short hangs sometimes) and the most strange thing is that I can't see anymore the ...
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3answers
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Crackling Audio issues on LACK of CPU load

I have been trying to track down an intermittent crackling audio issue for YEARS now to no avail. I've checked DPC, memory pagefiles, etc... back when I was running Win7 -- which also had the issue (...
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In Google Chrome browser, why does Gmail use so much of the CPU when hardware acceleration is enabled?

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 all coming from the Gmail tab. If Hardware ...
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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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1answer
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Windows 7 gets stuck with ~1% CPU. Especially with multithreading

Windows 7 32 bit, up to date, Intel i7 860. (For some reason the company runs 32bit Windows everywhere.) I tried to update all motherboard drivers etc. as far as possible. I have a performance issue ...
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1answer
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Bent processor socket pins LGA1155 after overheating CPU

I have an i7-2600k (not overclocked) on an ASUS P8Z68 V-Pro motherboard that I was cooling using a Corsair H60 since last August. My A/C went out for a period of two weeks and my ambient temperature ...
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Mac OS X Server 10.6.6 “disables” CPU in VMware Fusion

I installed Mac OS X Server 10.6.0 in VMWare Fusion the other night and it worked perfectly, until I ran Software Update. I upgraded to 10.6.6 through the combo updater, and now when I start the VM it ...
3
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1answer
153 views

How does the Docker daemon know about the available hardware resources?

We are running Docker on a RedHat VM on a VMWare hypervisor. When we added more virtual cores (vCPUs) to the VM the RedHat sees the additional resources and can address it but not the containers ...
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Is overheating a sign that I need a new CPU?

I have an HP Envy laptop. A while ago my CPU fan started dying, and the whole side of the laptop would heat up. I didn't use an application to check the CPU temperature, but I never experienced ...
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Antivirus is scanning and deleting infinitely generated temp files, causing high CPU usage

I am using Windows 10, and BitDefender Free Edition as Antivirus. Sometimes (it occurred not only once), I hear my CPU Fan spinning at very high speed and when I open my Task Manager to see what's ...
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Ubuntu VM won't run when assigned more than one CPU in Oracle VirtualBox

I've got a 64-bit ubuntu 16.04 VM running in Oracle VirtualBox 5.2.0 on a Windows 7 Pro host. The host has 12 physical cores (24 logical) so naturally I want to run my VM with more than one core! The ...
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Can I tell how much multi-threading I'm using each day?

Is there a way to determine (or even better, to log) how much benefit I'm getting from my computer's multi-threading capabilities? Background: My higher-ups are proposing to give me and my team new ...
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274 views

Windows is detecting the wrong CPU temps compared to Linux

I have a computer I built which has been rock solid for around a year or so and recently has been blue screening on me. When I do the usual spot checks I use new thermal grease on my H100i cooler. ...
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How to make Intel Turbo Boost to reach its maximum for testing cooling efficiency?

I noticed that Intel stock cooler occasionally gets really loud (oh, Intel, why did you make your stock coolers worse; SandyBridge ones were larger and quieter), so I will replace it with a third ...
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What does high CPU load in htop for processes with status S mean?

When monitoring my system with htop, the process status column for most processes under load is mostly S and switches to R sometimes. From my understanding of the docs status S means that a process is ...
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What are the risks of setting VirtualBox CPU count up to the *logical* CPU count?

The GUI and the documentation of VirtualBox warn about setting virtual CPU count higher than the physical CPU count: You should not, however, configure virtual machines to use more CPU cores than ...
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1answer
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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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1answer
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Undervolting with Intel' XTU - which offset should you reduce?

It is a pretty basic question, but I could not find an answer to this via Google. The value you are supposed to adjust is the "voltage offset". However, there are two kinds of values in the utility ...
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How does an x86 processor recover from S2/S3 sleep?

I was reading through this page on how sleep states work in Windows and I was intrigued by the reset vector. My current understanding is that; When the system is in S2/S3, the processor is fully ...
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What CPU features does Windows 7 require?

I'm looking for the minimum CPU requirements for Windows 7. Specifically, I want to know if it requires SSE, SSE2, etc. Wikipedia states that SSE2 was a requirement for Windows 8, but it doesn't say ...
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1answer
686 views

I bent CPU socket pins! How to unbent them?

I have a Intel DG33FB motherboard with a LGA755 (Socket T) CPU socket and a 2.6 GHz LGA755 processor. I want to upgrade the processor but while doing so I accidentaly bent some pins on the CPU socket....
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2answers
208 views

Brand new rig experiencing terrible fps lag in games. Tried everything I can think of to fix it

I have an entirely new computer SPECS HERE (except for the ram which is ~5 years old) that has been running great. Today however, every game I play has been experiencing lag that makes them nearly ...
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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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1answer
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Reactivate Dormant Processes in Windows7

I have a very computationally intensive program (which I wrote in python) and starting two days ago I ran 6 copies of it in parallel (using 6 Cygwin terminals on a Mac Book Pro running Windows7 in ...
3
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1answer
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Desktop remains on, display quits working, loud “skipping” noise follows

For the past 2-3 days, strange things have been going on with my desktop and its interaction with the monitor. While playing a game, my monitor went black as if my computer had been shut off. However, ...
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0answers
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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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1answer
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High CPU temperature of new Clevo w350ST Laptop

I just recently bought a new Clevo W350ST laptop. While everything has been working extremely fine in it, its the CPU temperatures on the laptop I am worried about. The Tj Max. for my processor (i7 ...
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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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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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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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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 ...
3
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1answer
387 views

CPU clock scales down so computer is unusable after switching to battery

When I am plugged in my laptop runs great however when I unplug it and I'm on battery power my CPU clock speed scales down pretty much all the way. I know this is happening by monitoring the clock ...
3
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1answer
300 views

Why are uploads maxing out CPU?

Some odd behaviour ... when sending / uploading files, my CPU usage goes to about 100%; Activity Monitor reports 'Kernel Task' as the culprit. I first noticed this when sending emails in Mail, but it ...
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0answers
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Max RAM: CPU vs Motherboard

Looking to put together a cheap(er) server/workstation for doing some big statistical analysis. Right now, it's running on a machine with 16gb and we're using 40gb of swap. So I want to maximize ...
3
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1answer
78 views

How different instruction types are defined in AMD microprocessors to identify DirectPath vs VectorPath flows?

In AMD 10h architecture like Opteron the prefetched instructions after being aligned are separated into 2 flows: DirectPath (or Fastpath) and VectorPath (Microcode engine). Later these flows are ...
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2answers
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PCI-E bottleneck when transferring data between CPU and GPU

I've read that the transfer overhead between CPU and GPU is a big bottleneck in achieving high performance in GPU/CPU applications. Why is this so? According to Nvidia's bandwidthtest program, my CPU/...
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1answer
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How to calculate the setting for BCLK with Core i7?

Help me figure out the proper calculation for overclocking a Core i7. Given that: the default maximum memory speed is 1333MHz, the motherboard supports up to 2200 MHz by overclocking, and it has a ...
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1answer
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Is the Windows Update responsible for CPU throttling?

Windows 10 forced me into an update on Thursday evening and everything seemed to go off without a hitch. Or so I thought. I did notice at the time that for some peculiar reason Intel HD Graphics ...
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2answers
1k views

Computer with high specs lags for some reason. Don't know why

My computer has pretty decent specs. Windows 10.1 i5 3.7ghz processor 16GB Ram 4GB Nvidia GTX 980 Graphics Card CCleaner is run regularly. Over the last few weeks the computer has begun lagging and ...
3
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2answers
1k views

Game drops to 0 FPS and CPU Usage drops to 0%

So for about 2 weeks now I've experienced a problem while gaming. My frame rate would drop to 0 and my computer's CPU Usage would drop to 0% at the same time. This would stay this low for up to 30 ...
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1answer
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Disabling CPU Turbo Boost causes unexpected increase in GPU power usage?

When I disable the CPU Turbo Boost the following happens: the CPU clock and power correctly decrease the GPU power consumption and temperature increase - despite 0% GPU load and no change in GPU ...
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0answers
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rcu_sched detected stalls on CPUs/tasks

I'm running many VMs using Virtualbox. These VMs use Debian 10.3 (the latest version). And I'm experiencing bugs / freezes as you can see below. It looks like this is happening on the VMs where I ...
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Why am I seeing 100% CPU usage from mundane tasks on Windows 10?

I have a problem when my CPU raises to 100% usage from mundane tasks that normally take less than 1% of CPU for a few minutes. This is how it looks like: Now it is true that the Antimalware can take ...

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