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

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Low processor performance after removing and then plugging the power cord

It's really confusing. When plugged in, everything is lagging. On battery everything goes smooth, three times as fast. I looked into power options, set everything to default and tried the three ...
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1k views

Why USB 3.0 ports are causing high CPU usage?

After two weeks of research and a lot of thinking, it looks like my problem (Explorer is very slow after connecting external HDD) is caused by USB 3.0 ports. In short: after working around one hour ...
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0answers
257 views

Computer not booting when Hard disk is connected

I bought a new system with Seagate 2 TB internal hard disk about a week ago. I have Windows 7 running on my PC. Till yesterday my system working fine. Today when I tried to start my system, I see ...
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4answers
269 views

PC power usage related to power supply

Not sure if this is the right place to ask such a question, but I don't see a more relevant place on stack exchange otherwise. So recently I've become kind of obsessed with becoming more efficient ...
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1answer
6k views

High Disk I/O and CPU usage of System Process in “System Volume Information”

I've a problem with high disk IO and cpu usage from the system process. With the performance monitor I can see that it writes and reads about 100MB/s froM "System Volume Information". I tried to get ...
2
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1answer
408 views

Is performance increase through doubling available cpu cores by using a dual-cpu pc the same as using a cpu with twice as many cores?

Imagine this base configuration: 1-cpu board with a 4-core processor, performance is 100%. How different from that configuration performance-wise will be: 2-cpu board with 4-core processors 1-cpu ...
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3answers
5k views

Latency of CPU instructions on x86 and x64 processors

I'm looking for some table or something similar that could help me to calculate efficiency of assembly code. As I know bit shifting takes 1 CPU clock, but I really looking how much takes addition ...
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1answer
2k views

Intel Ultrabook’s low powered processors are slow?

I am planning to buy a new laptop these days and for that I am searching for online user reviews etc. these days. Laptops that I have shortlisted includes HP Envy 6 which is an ultra-book and have an ...
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1answer
343 views

Changing processor and motherboard but keeping same Operating System setup,etc [duplicate]

I want to upgrade my Processor and Motherboard but I want to keep the OS setup(dual boot for Ubuntu and Windows7) intact. Is it possible? What are the problems faced, if any?
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1answer
24 views

Science computation approach & errors

After reading one interesting science paper last week, I'd like to hear opinion of someone experienced or who is "in the theme": Modern processors have some finite level of precision, so what ...
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3answers
7k views

How to replace properly motherboard and cpu on a windows (7) machine?

I am going to replace the motherboard, cpu and ram of my windows 7 pc (at home, this is not a server, of course). What is the proper way - relative to the software and not to the hardware, unless of ...
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1answer
331 views

are 17W i3-i5 processors silent?

I need a quiet but "fast" laptop. My previous Pentium P6200 machine was very quiet. I'm going to return a laptop with i5 3230M because it is too noisy. Now I'm thinking about something less powerfull. ...
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0answers
482 views

Why does my computer shut down suddenly without any warning?

My computer is: Motherboard: MSI 970a-g45 CPU: AMD FX-8350 eight core processor 4.0 GHz Power Supply: TSCO 650 Watts I bought my CPU 2 days ago. My last CPU was an AMD Athlon 460 x3 3.4 GHz. After ...
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1answer
129 views

Processor pipelining confusion [closed]

After reading how processors use pipelines (from various articles: wikipedia, SU, and other places), I'm a bit confused on certain parts of what I've read, so I would just like to share what I've come ...
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3answers
2k views

Hypothetically, can I swap processors between a smartphone & a desktop?

When manufacturers mention the speeds of smartphone processors, is it right in my understanding that the speeds between smartphone processors and desktop processors are comparable? In other words, ...
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0answers
215 views

Sempron 3600+ SSE instructions missing. DirectX 11 not installing.

I have run CPU-Z but no SSE1/2/3 were found under the instruction set. My GPU is an ATI Radeon HD5450. I haven't over-clocked the GPU or the CPU. This is the CPU-Z report: When I try to web-update ...
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0answers
38 views

Swap cooler on server hardware

I was asked to make a Primergy TX140 S1p FTS Server quieter than it currently is. You can hear it from behind the cupboard (its in a pharmacy). The server uses a Intel Xeon E3-1220v3 with a FCLGA1150 ...
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0answers
394 views

Windows Explorer 25% CPU usage while computer is idle?

I am facing a problem with my Windows Explorer. I cannot figure out why this happens even if the computer is idle. When I try to run some games that are old(released before 2005), at first trial the ...
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1answer
299 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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3answers
352 views

How unsafe is not tighing screws diagonally?

Image example: When I first installed my Hyper 212 Evo I didn't follow the instructions closely, and did not do the above. The machine seems to runs fine but I'm paranoid I damaged the 3770K in ...
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0answers
110 views

Notebook running hot with ArchBang

This is my first installation of Arch, so I may have forgotten something. After booting it, the laptop quickly starts to became hot. I've been reading documentation on Arch wiki, but didn't found ...
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1answer
420 views

How interpret cpu usage exceed 100 percent in IIS process [closed]

How to interpret indication cpu consumption greater than 100% on w3wp.exe process, running on 32-bit compatibility mode (Win2K3 64 bits/multicore) ? Eg If I have indicated consumption of 467%, on a ...
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1answer
71 views

Why Windows 7 PC is physically hot but not virtually?

I recently noticed my PC's case is somewhat hot on the top after some hours, and is a little lag-ish than before, so I installed "Core Temp" freeware to check the CPU's temperature, I guess it's Ok ...
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0answers
69 views

How to “convert” processor/chipset name to /proc/cpuinfo output?

I'm trying to choose a laptop and see "Chipset" and "CPU" being listed as a codename. Sometimes there is an article in Wikipedia about the processor or chipset mentioning it's features, sometimes ...
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1answer
118 views

How to run 5400 xeon series on a pre E11030-202 s5000xvn motherboard

I have an Intel s5000xvn (PBA D37261-901) motherboard running dual x5355 xeons. I was able to pick up a matched pair of x5460 xeons. Unfortunately the x5460's want a s5000xvn (pba E11030-202 or ...
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0answers
274 views

Computer monitor goes black when gaming

I was playing Cube World the other day and my screen blacked out, and I thought it was a one time thing so it happened like 2 times afterward so I stopped playing Cube World and my screen did not ...
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1answer
557 views

Windows games runs slow, with brand new large monitor

I recently bought the awesome ASUS PB278Q monitor and was happy with it until I launched Call of Duty Modern Warfare 3. The game performed awfully on my Windows 7 machine (lags, freezes etc.), ...
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2answers
7k views

How to get the Maximum Speed of CPU

In regards to my CPU, most article (include the Wiki) told me that I must use "FSB", but I don't have such a value (see below) so I have some question about CPU: Intel(R) Core(TM) i5-4670 CPU @ ...
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4answers
7k views

Fake Intel CPUs?

I recently purchased a processor off eBay that was labelled as an Intel Core i5-2520M. It came shipped in just a tray, not the original box, but the processor and all its markings look perfectly ...
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0answers
67 views

very weird: Connecting Android causes Client Service Runtime Process to severely slow down PC

This issue has been bothering me for a long while, very weird and couldn't solve it. When I connect my Nexus 4 Android to the PC, suddenly the Client Service Runtime Process cpu consumption jumps ...
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2answers
11k views

How to test if a processor is heat damaged?

I have an older PC with an Phenom II processor that we use as a kids' computer. It's been running fine until about a week ago when it randomly shut down and would not get past the Windows load screen ...
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1answer
4k views

Is my CPU 2nd or 3rd gen?

I bought a Toshiba Satellite C875 laptop that was advertised as a '3rd gen Intel i3 processor. When I got the laptop the system info said 'Intel(R) Core(TM) i3-2348M CPU @ 2.30GHz, 2300 Mhz, 2 ...
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1answer
248 views

How to determine number of tests performed by CPU per second?

My context is that for exam on encryption methods I need to calculate estimated time taken for brute force attack to succeed. Therefore I need make an assumption about the system used to crack the ...
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3answers
97 views

Can I upgrade my computer this way?

I have an older computer and it is struggling to keep up, especially now that I am starting to turn to PC games through Steam, but I know how much you can get ripped off buying a box computer from a ...
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0answers
105 views

Can QEMU be used on Mac OS X to emulate a one-core CPU (preferably only the CPU)?

Can QEMU do this kind of emulation? On Macs there's no an easy way to set CPU affinity, so this could an interesting workaround for the older programs that don't work well in multi-core environments.
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2answers
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CPU usage in virtual machines

I have a host machine with 1 logical processor running at 2.0GHz with 2 VMs running. Each VM is running at 100 % utilization (according to Task manager inside the VM). I realize this "100%" is not ...
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1answer
495 views

Get cpu temps from terminal using Cygwin?

I am using Cygwin 64 on Windows 8 and would like to use the bash interface to get cpu temperatures (4 cores, as well as gpu temps). Is this possible? I am using the temperature monitor application and ...
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1answer
170 views

RAM compatability with motherboard - not POSTing in Dual Channel setup

I have a problem in installing 2 DIMMs of G.SKill memory in my motherboard. To start with motherboard is http://www.msi.com/product/mb/KA790GX.html#/?div=Detail and the RAM is ...
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0answers
205 views

Laptop with i5 used for gaming, but it says I have 0 video RAM

I have a HP laptop, with 8GB RAM, Intel Core i5-2430M CPU @ 2.40 GHz, 2 Core(s), Windows 7. I have this problem where I get constant low FPS in games, to a point where the games become unplayable. I ...
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2answers
3k views

Will my CPU bottleneck this GPU?

I've been meaning to upgrade my computer for quite a long time but money's a bit short and I can't do it all at once, I want to upgrade my GPU first because it's not up to par with most newer games ...
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1answer
13k views

Do I need to replace my CPU or Motherboard, PC not powering on

My PC will not power up at all, after thinking it was the PSU I replaced that to no resolve. When I try to power on the PC the CPU fan will move about 1mm and then nothing. I tried all sorts, but it ...
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2answers
400 views

Do ULV Core i5 CPUs consume same power as i7 CPUs if they use same TDP?

Title says it all really: If you have a Core i5 CPU and its TDP is 17W and there is a Core i7 CPU which also has TDP 17W, will they consume the same battery power even though one runs faster? I am ...
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2answers
789 views

Task manager: CPU Utilization and speed?

I have a question regarding task manager in Windows 8. It shows us CPU utilization and speed. From what I understand, utilization is how much of the processor time is spent running processes. Speed ...
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1answer
3k views

Processor Speeds?

I was looking around for laptops one day on BJs, and found one I really liked - the HP Envy 17-j020us. But the processor was a 4th Generation Intel Core i7-4700MQ Processor with Intel Turbo Boost 2.0 ...
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0answers
624 views

CPU performance monitoring and diagnosis Maximum Frequency drop

Question: what might be the reason why the maximum frequency goes down to 49%, while this is not sufficient to run existing processes? (please note if I am wrong in interpreting that CPU usage is ...
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1answer
899 views

Macbook Pro - Removing Thermal Sensor, problems?

I'll try be brief. My macbook pro 2008 unibody, kept asking me to shut down, if you kept pressing cancel it would wait, and ask again... and repeat until it just turned it self off. After it would ...
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votes
4answers
143 views

Does anybody know anything about a Digital rtVAX 300? [closed]

I have this cpu that I know nothing about. One of my dad's friends gave it to me when he was clearing out his garage. It is very big and I think it is to a big computer, but I honestly have no idea. ...
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1answer
737 views

Sony Vaio Pro 13 ultrabook- powerful enough to run VS2012?

I am thinking of purchasing a Sony Vaio Pro 13 Ultrabook. The specs would be: Intel i5-4200U @ 1.6GHz 8GB Ram 256GB SSD http://www.sony.co.uk/product/vn-pro All the reviews I have read mention ...
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1answer
63 views

Strange critical error with my desktop

I recently reinstalled because my harddisk was on an old hardrive from a laptop with a write speed of 60MB/s. While I was at it I installed a new CPU heatsink. When I removed the old stock one the CPU ...
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1answer
114 views

What does the CPU *really* do during memory instructions?

I was recently testing out the linux cpufreq module and noticed that regardless of whether I was running a CPU intensive benchmark or a memory intensive benchmark, the cpufreq module always chose the ...