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

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in chosing CPU : l2 cache vs clock speed..?

If the other factors are the same , which is more important the amount of L2 cache or cpu clock speed .. for example 1.6 GHz 2 MB vs 2.3GHz 1MB .. Which is better in : 1- MS office 2- surfing the ...
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Pentium motherboard does not POST

I have an old FlagPoint P5VX (rev 1.1) AT style Pentium motherboard which i salvaged from the dump. Unfortunately, the components marked with red dots are/were missing. I have three Pentium CPUs (one ...
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18 views

How are super computers built? [on hold]

I only know about assembling a computer from individual parts like motherboard, cpu, ram, graphics card etc., I heard there are supercomputers(SC) containing hundreds of processors working together ...
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1answer
3k views

CPU fan turns on for a second and stops, PC does not start at all

I have checked my PSU and it works fine. When I turn on the MOBO, the CPU fan, case fans and the psu fan itself turn on for half a second and then turn off. The PC remains off. The Bios light turns ...
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3answers
3k 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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135 views

1600 MHz RAM, detected as 1333, XMP doesn't work

I have an Asus M51AC-FR034S PC which has a M51AC motherboard that is in fact a rebranded H87M-PRO. I have 2 RAM sticks (I don't know the exact word for that) A-Data MI64C1D1629Z1 8GB 1600 MHz Slot ...
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2answers
1k views

Switched CPU on Dell Optiplex GX520, BIOS says it's incompatible

Motherboard and the new CPU should be compatible. The old one was a Celeron. This is the motherboard and this is the CPU. How do I update the BIOS in a situation where I can't boot? Do I have to the ...
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0answers
35 views

Can a 64-bit OS be loaded on a 64-bit processor when the EFI is 32-bit?

I'm struggling to get a Chromebook loaded with a new OS. The Chromebook is a Toshiba CB35-B3330, and it has a 64-bit Intel Celeron N2840. I'm struggling because I can't get any useful information on ...
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4answers
458 views

cfprefsd using > 90% CPU - any way to find out what program is using it?

In the last few weeks I've noticed my macbookpro (mid-2014, core i7, retina 16Gb RAM, el capitan patched to latest) running quite hot and looking at the CPU usage it seems it's cfprefsd that's doing ...
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0answers
28 views

Socket LGA 1151 compatibility with CORSAIR Hydro Series H50 water cooler [on hold]

I'm building a new PC and wanted to check the compatibility of some parts. The PC will be using a LGA1151 motherboard: http://www.newegg.com/Product/Product.aspx?item=N82E16813128869 And Skylake ...
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3answers
1k views

Core 2 Duo vs. Core i5 for video editing

For the purposes of video editing (in a notebook), is there a significant difference between Core 2 Duo (2.88 GHz) processor and a Core i5 (2.66 GHz), all other things being equal? Or is it the case ...
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1answer
19 views

How can I estimate the time it takes a certain computer to guess a password?

As cyber security and its exploitation become more prominent and relevant, I find websites such as https://howsecureismypassword.net/ to be very interesting. When the user enters a password, it ...
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0answers
17 views

System suddenly going into continuous/infinite restart/reboot loop without even POST with clicking noise from PSU

I'm new here and desperately in need of help. My Dell Inspiron One 2330 was working perfectly till yesterday night. Today morning when I tried to turn it on, it went into a continuous restart loop ...
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0answers
14 views

Register allocation tables overwrite

Reading about the Xeon processor: the Xeon has two register allocation tables (RATs), each of which handles the mapping of one logical processor's eight architectural integer registers and eight ...
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0answers
8 views

Java Processes on second identical server is taking up twice as much cpu time

I have two servers with the same exact configuration. Both servers are running a java process that are running the same code base. JVM arguments are the same Java System properties are the same ...
2
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2answers
106 views

Which physical core does the operating system use? [closed]

The operating system needs to be running on one or more physical cores of a multi-core processor, right? Is it possible to identify which those physical cores are using a piece of code?
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6answers
23k views

Where exactly L1, L2 and L3 Caches located in computer?

Where exactly L1, L2 and L3 Caches Located in computer ? I know, we use Cache to increase performance by picking DATA and INSTRUCTIONS from Cache rather than Main Memory. Following are my questions ...
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1answer
27 views

Is it possible to run a 2GB RAM on Asrock G31M-VS?

I just want to know if I can stick another 2GB RAM on my Computer. System Hardware: Motherboard: ASRock G31M-VS (FSB1333 DDR2 800 Dual Channel). CPU: Pentium Dual-Core 2.5GHz. RAM: DDR2 800 Memory: ...
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0answers
23 views

which cpu is better N3050 or N2840 [on hold]

I want to get a new cheap laptop for surfing internet and MS office and play videos .. I want to chose between 2 models Lenovo G50-30 with celeron N2840 cpu and Lenovo B51-30 with Celeron N3050 .. All ...
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3answers
780 views

Difference between “system-on-chip” and “CPU”

Very confused, in some websites, they have this line: iPhone 5s CPU: Apple A7 other websites saying that: iPhone 5s System-on-chip: Apple 7 CPU: 1.3 GHz 64bit dual core other sources saying ...
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28 views

Intel PCM ( Performance Counter Monitor ) - Low hit rate for LLC

I am having Intel Xeon D-1520 CPU I tried to run Intel PCM to get the the L3 cache miss and hit ratio. L3MISS: L3 cache misses L3HIT : L3 cache hit ratio (0.00-1.00) Core (SKT) | EXEC | IPC | ...
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0answers
12 views

What does this XML block for CPU do?

I'm having trouble getting a CPU configured. The problem CPU configuration is shown below. However, I have a good configuration and I am trying to understand what it does so I can add pieces of it to ...
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37 views

FPS drops when playing video in background

I am trying to understand why I experience FPS drops in demanding games when a video is playing in background and how to fix it. My particular setup (see the specs at the bottom): two monitors in ...
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4answers
21 views

How do I check what is spiking the CPU while the computer is idle

My Windows 10 laptop with an i7 and 16 GB of RAM often gets the fans going full speed when I am not using it. It is a bit slow to respond sometimes when I try to wake it up to check what is going on. ...
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0answers
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CPU usage of DELL Latitude E6410 is increasing after a period to 100%

I have DELL Latitude E6410. I have the problem since 5 months that the CPU works to the full capacity (100%) if I just use Firefox with pair of tabs and watching something at youtube then the CPU is ...
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0answers
53 views

How serious is bug in i7-6700K CPU?

I'm considering new machine for my application development (Visual Studio, C++, paralel builds with Incredibuild). I wanted to purchase Intel i7-6700K to my machine. But I'm not sure now because of ...
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1answer
239 views

Can't seem to use 2CPU on Oracle VM VirtualBox 5.0.2

I have an Intel® Celeron® Processor N2815. I've confirmed Virtualization and VT-x are enabled. I can't choose more than one CPU when configuring a Linux machine on VirtualBox; the scroller is grayed ...
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1answer
28 views

Trying to figure out if my processor supported RAM I just brought [duplicate]

I just brought G. Skill RipJaws and this is my first time buying RAM to update my computer. When it arrived today it said on the package it was compatible with Intel Core i7, Core i5, Core i3 and ...
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2answers
7k views

Upgrading laptop RAM [duplicate]

(This question was originally asked for my specific laptop: Dell XPS 15 L502X. But it seems that understanding I gained from the upgrade experience I am able help my friends to decide upgrading RAM ...
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1answer
43 views

lscpu lists cpu clock speed incorrectly

I have a laptop that runs Ubuntu 13.04, with Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz, which gets reported correctly with cat /proc/cpuinfo. However, the clock speeds are listed as 800 MHz: lscpu: ...
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2answers
23k views

Heatsink compatibility for the new Intel Skylake processors (LGA1151)

The new Intel Skylake processors have just released, but they don't come with a fan/heatsink. As a result, I have to purchase a third party heatsink, but it seems there are none yet listed on popular ...
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3answers
75 views

Asus Z170-A No POST

My recently build system mainly contains the following components: Mainboard: ASUS Z170-A Processor: Intel I5-6600 PSU: BeQuiet S6 550W (Until now I have been using the same PSU with a Gigabyte ...
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0answers
22 views

Why won't my PC turn on? [closed]

My desktop computer will not turn on. Initially I thought my power supply had died and bought an identical replacement. I hooked it all up and my computer still wouldn't turn on. I decided to see ...
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0answers
11 views

upgrading cpu pavilion dv6-6135dx [on hold]

I have notebook pavilion dv6-6135dx and I want to upgrade my cpu amd a8-3500m with 1.5ghz to AMD A8-3550MX with 2ghz I have searched alot they says it is compatible. I am wondering if there any thing ...
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1answer
16 views

Why is CPUMark rating relatively the same for the Intel 2955U compared to newer Intel Braswell chips such as N3150?

In terms of processing power only (ignoring GPU performance), why is the CPUMark performance of the Celeron 2955U (2-core, 1.4GHz) relatively close to the Celeron N3150 (4-core, 1.6GHz)? Intel ...
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1answer
40 views

Why is current CPU frequency read-only for root?

I have a program that provides benchmarks, but its OS agnostic and does not know how to read CPU frequencies. The test program is driven through a script. If I provide the CPU frequency, then the ...
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1answer
17 views

concerned about Cpu for Streaming/gaming [closed]

I was wondering if the cpu listed below would be better than my current cpu - Intel Quad-Core 2.33GHZ Q8200 processor for streaming games on my computer. I know that it may depend on alot of things ...
4
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3answers
4k views

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 ...
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0answers
18 views

What is the difference between Server and Embedded Intel server processors

I am in the process of building a server that will run SQL Server 2012 and was looking for a processor. While doing my research I have found Intel processors on their page being grouped in two ...
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0answers
33 views

Which saves more power, core parking or clock down-throttling?

Sometimes I leave my computer turned on for long periods while not really using it (to seed files over torrent, for instance). My CPU is an AMD FX-6350 cpu (6 cores, 3.9 GHz) which is kind of ...
0
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1answer
29 views

How do I evaluate 2 different hardware specs for an application?

I have a single-threaded, CPU-bound application that's currently running on a multi-core Windows machine (32-way 2.1GHz Pentium Pro/II/III). It's stuck at 100% of one of the "cores", which equates to ...
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2answers
33 views

On device manager it says have 4 of the same 2.40 ghz processors so do i have 9.40 ghz

When I go to device manager to check my processor speed there are 4 the same exact processors shown is this a quad core and does the speed add up?
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1answer
88 views

Random shutdowns and restarts

I could use some fresh thoughts regarding my shutdown issue. So, about 2 weeks ago my pc started to occasionally restart while playing games. Sometimes it happens after 4-10 minutes but occasionally ...
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0answers
24 views

How to display CPU and GPU fan speed percentage (instead of RPM) during gaming?

I use MSI Afterburner, RivaTuner and HWiNFO to (on screen) display CPU & GPU temperatures during gaming, but these softwares are not able to display the fan speeds in percentage. They only show ...
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1answer
19 views

Using modern AMD chips with Vmware and Virtualbox

Looking to build a cheap PC and then install VMWare workstation and Virtualbox to create some operating system virtual machines. Do all modern chips work with VMware and Virtualbox, or do they need ...
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1answer
43 views

Does the chipset also determines installablility of 32bit OS or 64bit OS?

I have Fujitsu Lifebook A6025 with Pentium T2130 and Intel® 945GM/ ICH7-M chipset according to the spec. I want to upgrade the CPU to Intel Core 2 Duo Mobile T7400(Socket M) CPU. The T2130 CPU ...
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0answers
24 views

Stuck at “Loading operating system…”

Today I got out an old PC from about 2011, running a Sandy Bridge i3. It had no ram or HDD in it, so I threw 4GB and a HDD in and attempted to install Ubuntu. After making sure the BIOS settings were ...
3
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2answers
398 views

486 computer does not POST

I have some trouble trying to POST a old Intel 486 DX motherboard. If i power up the board , the CPU becomes hot quickly and it doesn't make any beep noise, but only background noise (even without RAM ...
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0answers
20 views

CPU or Graphics card defect?

From time to time my computer dies while in usage. The screen either turns completly white, black or shows thin vertical stripes in two colors. I then have to kill it with the power button. When I ...
36
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7answers
67k views

Are there solutions that can limit the CPU usage of a process?

I am using an old laptop and doing heavy processing that needs high CPU usage for a long time (~30mins - 2hours). When the process puts heavy load on CPU for a long time, CPU overheats and computer ...