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

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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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44 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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45 views

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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45 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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36 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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192 views

What does L4 cache hold on some CPUs?

All modern multi-core CPUs have at least a three-level cache (refer to Why do we need multiple levels of cache memory?). L1 is the fastest and smallest, L2 has slightly more latency but is larger, ...
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101 views

High CPU Usage caused by JavaScript

I have a big problem with my new Ultrabook. It is a Asus UX305LA with an i7-5500U processor. The problem is, that my CPU Usage while surfing on web pages using Javascript is extreme high. For ...
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44 views

Identify this Intel Core 2 Quad engineering sample

Which is this Intel Confidential cpu? It has 2333MHz Core + 12MB Cache
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353 views

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

Update: Upgraded BIOS to 1801 - CPU got hotter 70-75degC!! Disabling Turbo Mode in BIOS stopped the cycling (BIOS 1702) CPU temp ~65-69degC. Already changed the CPU (with upgraded dual fan cooler) ...
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299 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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20 views

Updating BIOS File Build Date

I am in the process of updating my laptop's BIOS to add support for a CPU however I ran into an issue when I tried to adjust the build date of the BIOS file. After adjusting the file from built in ...
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54 views

How to tell if CPU is actually overheating or is a false positive?

How does the CPU know it's temperature? I've been having trouble turning on my computer as I keep getting "CPU fan error". I reapplied thermal paste and got a new heatsink/fan and still the same ...
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47 views

How To Find CPU Microcode For BIOS Patch

I have recently been wanting to upgrade my laptop's CPU but as it only has support for up to a dual core i3 I was looking to find the required Microcode for patching/updating my BIOS. I haven't been ...
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86 views

Can't get Intel heatsink back on

I took off the CPU heat sink to blow out the dust. Now I can't get it back on. I've tried everything I red from Google: I pull up the black pins so they're inside the white part before putting the ...
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36 views

Linux RT vs 'niceness' priority and preemption

I wanted some clarification on the differences between real-time linux process priority (-99 - -1) and normal user-level 'niceness' (0 - 40) priority, and the effects on scheduling and pre-emption. ...
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21 views

Change CPU reported name on Virtualbox or Vmware Guest OS

I want to find a way to change the name of the cpu on the Guest OS of a virtual machine (either virtualbox or vmware). For example, while my real pc has an intel i5-5200u I want the virtual machine ...
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49 views

All of a suden CPU over heat error on boot

I recently moved houses and took my desktop computer with me. Before moving, I dusted it out using compressed air and took the heat sink off the CPU and dusted it out too. When I reassembled the ...
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operations process in a computer

Is it true that all high-level operations in a computer (say, copying, pasting, web surfing, running apps etc) are all finally converted to micro-operations (say, arithmetic, logical and shift) and ...
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58 views

I am running Eclipse Mars 4.5 , My CPU usage goes beyond 100% and suddenly all system stops

My system Info:: Model: Dell vostro 1015 RAM: 4 GB (2 GB extended) Processor: CORE 2 Duo Software's installed Eclipse Mars(STS and M2E plugins installed) MySql Crome Quick Heal Antivirus I have ...
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1answer
22 views

LGA775 motherboard cpu support

My motherboard says it doesn't support Pentium D 925, 935, 945. It supports 920, 930, 940, 950 but I inserted 925 and it worked. Could it cause any problems or incompatibility in some stuff? Why it ...
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43 views

Is the computer BIOS specific to an architecture

Is the BIOS manufactured with the processor in mind? Suppose I have a 32Bit Intel processor and I wish to to upgrade to a 64 Bit Intel later. (Assume this is possible & not just a switch ...
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376 views

How would I go about overclocking my Intel Pentium N3700?

I've searched all over the 'net for this one, and I couldn't really find anything that would allow me to overclock my CPU. My CPU model is an Intel Pentium N3700 quad-core operating at 1.6 GHz base ...
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78 views

Does the CPU or motherboard throttle?

Can a CPU throttle itself, or is it the motherboard that does it? By throttle, I mean when the CPU underclocks and undervolts itself due to high temperatures.
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Linux cpu hotplug not working as expected

I'm testing linux cpu hotpluging on normal desktop 8-core AMD machine. Problem seems that after onlining a CPU again taskset and kernel refuses to move and/or schedule any tasks on the core. E.g. ...
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CPU (with integrated GPU) UPGRADE with Linux Mint (from old Pentium G620 to i7-3770)

I have a system based on Linux Mint working very well, I am really happy of it but I am a newbie with Linux, only 2 years I use it and I cannot solve every problem simply like I was able with my old ...
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31 views

Windows 7 running slowly despite having lots CPU and memory free

This is my computer spec: Intel i7 2500k @ 3.4ghz Win7 64bit 16gb of ram Radeon HD 6800 My computer is starting to run progressively slower; for example, when switching between programs i.e. Excel ...
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Reading CPU model specific registers on linux

I am running Ubuntu 15.10 but testes it also on Debian. I have Intel i5-5675C processor. I am using msr-tools-1.3 to do it. I am able to read register 0x00001a2 with the following command: rdmsr ...
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143 views

Turn off HyperThreading without BIOS

I need to turn off HyperThreading from my i5-3210 notebook since it hinders my IDE performance. My i3 took about 10+ seconds from compile to run in my Android VM, same code runs in my AMD in about 10 ...
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Does such a cache (unreduce) actually exist?

I'm reading about cache replacement algorithms and one states (source, page 37) Def. A reduced schedule is a schedule that only inserts an item into the cache in a step in which that item is ...
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Desktop suddenly turned off and won't turn on again

My desktop suddenly shut down and it does not turn on again. I have tested the PSU with the paperclip trick and the fan started to spin. What do I do from here to know what is broken? There is no ...
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88 views

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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Dxdiag result about CPU

My customer sent me dxdiag result in txt file. For the processor section it says Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz (20 CPUs) The "20 CPUs" in parenthesis confused me. This CPU has 10 cores. ...
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Where does a mov instruction exactly execute in a modern cpu (considering an 80x86 assembly language)?

I'm a bit confused where a simple mov instruction executes as from the components I know a modern cpu usually has I see no place where it could be executed, I know that in a simplified Von Neumann ...
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22 views

System crashes with following Machine Error (screenshot included)

I'm running Ubuntu 14.04 LTS. CPU: Intel Core i7 950. Memory: 3x2GB Kingston DDR3-1066. GPU: Gigabyte ATI 5670. HDD: Seagate Baracudda XT - 2TB. Windows 10 and Ubuntu 14.04 dual-boot. Today it ...
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What is the primary reason more RAM makes a computer faster?

Whilst studying for an exam I read that more RAM decreases the number of page faults. Given that handling a page fault can cost many millions of CPU cycles is this the primary reason more RAM will ...
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62 views

VirtualBox 100 percent CPU usage

I have MacOS as the host (El Capitain) and Windows 7 as a guest - however the CPU rises up to 105 %, even when it is idle. I have searched the web, eventually found this thread here on SU, but have ...
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27 views

Computer shuts down 10sec after turn on

I have a VAIO VPC-EA2GFX/B, and the OS is upgraded to Windows 10. The fan is commonly running at full speed. I tried all trouble shooting I found on net, but could not solve the issue. Finally, I ...
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81 views

Allow browser to use more cores

I wrote an algorithm with JavaScript. When I execute it in Google Chrome, it takes about 30min, which is quite long. When I open the task manager during the computation, I can see that Chrome takes ...
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57 views

CPU temperate stuck and fan at maximum speed

I have a Dell Inspiron 5548 (i7-5500U, 16GB RAM) and I'm running Fedora 24 with kernel 4.5.1. I noticed the internal fan will stay at maximum speed (5500-5600RPM) forever while the CPU temperature ...
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172 views

Low FPS in games despite low GPU/CPU usage

My system: CPU: AMD FX-6350 @ 3.9Ghz GPU: AMD Radeon R9 280X RAM: 8GB DDR3 1600MHz PSU: Antec HGC-620M 620W SDD: Crucial 256GB SSD OS: Windows 7 Professional 64-bit As the title says. At first I ...
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PC won't POST w/ Corsair Vengeance Pro 16GB

Issue I've just received a new pair of Corsair Vengeance Pro 16GB (2x8GB) 1.35V DDR3L 2133MHz but my system does not boot and shows a 53/55 error code. Current setup Interestingly the PC boots ...
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235 views

Disadvantages of Integrated Graphics Processor

I recently upgraded pretty much everything on two of my systems but my NVIDIA GeForce 210 1GB Graphic Cards. One of my system has Intel Core i3 4130 which has Intel HD Graphics 4400 and the second ...
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54 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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Intel Management Engine or Collaborative Processor Performance Control throttling

This is a laptop. Before I installed Intel's Collaborative Processor Performance Control Driver and Management Engine, for very demanding jobs my cpu would go up to 95C and the fan would go up to ...
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38 views

Some errors occur on fresh installed windows 7

First, here's my machine's specifications (refer below) Motherboard: GA H81M DS2 REV3, Processor: Intel core i3 4170, Graphics card: GTX 950 2GB GDDR5 128bit, RAM: 16GB (2 x 8GB) Kingston HyperX Fury ...
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33 views

Motherboard or CPU dead?

I have an Asus Z8NA-D6C Motherboard with dual sockets for Intel Xeon CPUs. When I go to power up the system, however, I receive no post beep codes unless I fully remove the RAM. Any suggestions? CPU: ...
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145 views

Can I share CPU over network?

I have two desktops (one of which I'm using as a server), my main machine has a weaker i5 cpu, my server has a stronger i7 cpu. On my main machine I am experiencing stutters because the CPU often runs ...
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Cpu fan does not speed up according to heat level

I have just changed my motherboard, ram and processor. Everything is going fine but fan speed when cpu heats. Fan speeds do not change according to cpu temperature. I have tried to open smart fan ...
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42 views

Hyper-Threading (SMT) Affinity and Equality

This question goes out to the Intel gurus that I know are out there. Are both threads on a physical CPU treated equally? As we know, hyper threading on intel CPUs is a system in which each physical ...