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

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CISC and VLIW, and instruction and opcode

From http://en.wikipedia.org/wiki/Instruction_set CISC processors include "complex" instructions in their instruction set. A single "complex" instruction does something that may take many ...
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1answer
54 views

Why does changing the CPU frequency make the monitor display an error message?

Using MSI ClickBIOS2, I tried to overclock, but noticed an odd problem: Changing the base frequency allows me to overclock the RAM and such all at once, but although the system boots any amount of ...
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3answers
133 views

Is having more CPU cores a better thing for running a web server?

I was reading about how User threads are mapped to kernel threads on Wikipedia. From this article I understand that FreeBSD uses the 1:1 (Kernel-level threading). So each User thread created by the ...
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1answer
59 views

Processor working on low frequencies only

I am using a Dell XPS 17 laptop, which has Intel Core i7 2670QM processor. The problem is, that i cant get it work on higher frequency than 800 (multiplier x8). I doesn't matter how i load CPU it ...
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52 views

Relationship between RAM Frequency and Turbo Boost CPU's

Something I've never been clear on is the relationship between RAM frequency and the CPU bus frequency. I've read that getting faster RAM for a CPU won't speed up your computer unless you also over ...
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1answer
35 views

What can be used to lubricate a rattling fan?

My CPU fan started acting up a while back, it was making this rattling noise while running, so to fix the problem I grabbed a can of WD-40, took the sticker off the fan, and sprayed a little on the ...
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2answers
69 views

What is the operating system that routinely runs the fastest processors [closed]

Someone said that Linux is the fastest and or most powerful operating system that is much more powerful than any other operating system and not sure where to look to discredit her. Is there a way to ...
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0answers
22 views

Replacing an cpu in a laptop

My machine is lenovo g580 with i3-3120m. I want to replace it with i5-3360m. I checked out(on intel's official website) that sockets are the same (pga), tdp also the same (35W) and bios works with ...
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917 views

What's the difference between a AM3, FM1 or FM2 AMD processor?

I am thinking about upgrading my computer, and my PC store offers three different branches of AMD processors: AM3, FM1, FM2. Which technical differences do those branches have? Is FM1 obsolete (by ...
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3answers
71 views

Would it be fine to replace a Intel 2 Core Duo with a Intel i5?

Would it be fine to replace a Intel 2 Core Duo with a Intel i5? Specifically: Current Processor: Intel 2 Core Duo E4500 [ID: Too old to find an ID] with a: Desired Processor: Intel i5 4570 [ID: ...
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9 views

How to change cpufreq from userspace

I want to change the cpufreq through some sysfs entry.In general,ondemand governor works,but if I want the restrict the cpu operating frequency.Then it that case the governor policy needs to be ...
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1answer
451 views

How can I control my fans with SpeedFan? Doesn't show anything

I have a problem. My laptop gets really hot every time... Last time it was around 120 degrees. I need to control my fans with SpeedFan. But the problem is that my laptop doesn't see the fans. My ...
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2answers
46 views

DIfference between Intel Core and Haswell Intel Core

I am on the urge to buy a laptop and I have found the one I need in 2 websites. It's exactly the same on both places, but one of them is Intel Core CPU and the other is Haswell Intel Core. So I ...
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0answers
49 views

Memory remapping solution failed, only 3 GB usable out of 8 GB [duplicate]

I tried remapping my memory to fix the 3 GB of RAM problem but it failed. Basically this is my problem: I've tried doing memory remapping but it half-works. It goes from this: Total: 8192 MB ...
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1answer
99 views

Is running a game at a higher resolution more stressful on CPU/GPU full screen or windowed? [closed]

When running a game at a high resolution (1920 by 1200) is it more stressful on CPU/GPU when it is full screen (1920 by 1200), or windowed (e.g. 1280 by 1024)? What about if another window is open ...
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3answers
68 views

Is it a bad idea to monitor hardware and processes while playing a game or using a CPU intensive program? [closed]

For example, using something like Open Hardware Monitor to check CPU temperature, while running a game in another window. Neither are minimized. Or using Process Explorer with a web browser open as ...
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1answer
111 views

Difference between port mapped and memory mapped access?

Can anyone explain what's the difference between port mapping and memory mapping, and what having both accomplishes? Why is there port mapped, how does it differ in structure from memory maps, and is ...
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1answer
30 views

Is it better value for money to part-exchange my laptop for one with double the RAM and touchscreen than to upgrade the RAM of my current one? [closed]

I currently have a Compaq Windows 8.1 laptop with 4GB of RAM and an Intel-core I3 proccessor with 2.30GHz of CPU (and 400 gb of HDD). This cost me £359 at PC World back in August of 2013. However, I ...
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2answers
78 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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2answers
103 views

Motherboard with no post code beeps

I was helping my son put together a new computer and we've run across a weird problem. We started with an msi motherboard, i7 processor, generic case, 8gb ballistic DDR3, and power supply. The ...
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0answers
114 views

Laptop Upgrade Guide [Lenovo G560]

I want to ask if I could upgrade my current CPU with another one. My laptop with is Lenovo G560 Here is the current CPU Intel Core i3 370M 2.40 GHz / 3MB Cache / TDP 35 W I would like to know ...
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2answers
62 views

CPU fan extremely fast even with 0% CPU

I just reinstalled my operating system (Crunchbang on Debian testing), and all of a sudden the fan is running as fast as it can even with 0% CPU. The air coming out of it is cold. The only CPU ...
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1answer
59 views

Motherboard too hot?

On a new PC I just bought, Speccy reports that the motherboard is too hot: Since the CPUs and GPU are only at 30C, and 110C is really very hot, I suspect that the reported Motherboard temperature ...
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1answer
419 views

what does 2 core 4 threads mean in cpu?

I wanted to know what does 2 cores 4 threads mean about a cpu? I am talking about this cpu which i have http://ark.intel.com/products/47341/Intel-Core-i5-520M-Processor-3M-Cache-2_40-GHz I initially ...
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1answer
110 views

CPU Thermal Margin is very low

My computer is restarting unexpectedly for some days. First I though Its an os issue. I gone through all the sys log and didn't find any clue. Then gone through bios event log. Nothing was there too. ...
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55 views

How does the CPU Cache fit in this?

So I understand a little bit on how it's all wired together. Instructions are stored in Registers and the EIP/RIP points to Opcode that manipulates those registers (program code). However I can't ...
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40 views

Motherboard temp sensors failed?

I was fiddling around and my mobo cant read cpu temps anymore. Used to able to read it in HWmonitor and Speedfan, now it shows -1 or 0000 in bios. Has my internal sensors failed? Intel Pentium D 2.8 ...
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1answer
54 views

Start process in high priority

When windows starts I see most of the processes start in normal priority. I can manually change the priority of a running process. But what I want is when a particular process starts it be ...
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38 views

Disable 2 cores to meet 95w TDP

I have a Phenom II X4 965 BE CPU on a M5A78L-M LX/BR motherboard. The motherboard supports processors of maximum 95W TDP. The CPU is 125W TDP. So I disabled 2 cores of the CPU trying to avoid the ...
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0answers
45 views

Computer Fan Spinning Faster, But Temerature Is In The Negatives

Recently my computer has been louder than it had been in the past, so I looked into it and I believe that my CPU's fan is working harder than it did before (it's definitely not due to dust build up, ...
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2answers
1k views

Error “VT-x/AMD-V hardware acceleration not available on your system” while trying to run Virtualbox

I have to run Mac OS on virtual box for a class and it keeps giving me errors stating "VT-x/AMD-V hardware acceleration not available on your system. Certain guests (e.g. OS/2 and QNX) require this ...
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18answers
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If 32-bit machines can only handle numbers up to 2^32, why can I write 1000000000000 (trillion) without my machine crashing?

32 bit computers can only store signed integers up to 232 - 1. This is why we have run out of ipv4 addresses and have entered the 64 bit era. However, the number 232 - 1 (2,147,483,647) is not as ...
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confused: PPGA988, rPGA988B. what cpu socket is in my hp 4330s laptop and what cpus will it take?

Wow, I am so out of the loop these days with PC/laptop hardware. Upgrading a CPU is a whole lot more complicated than it was in the late 90s! I have an HP 4330s laptop that according to CPU-Z, ...
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1answer
57 views

2 Processors server and RAM

I am in the process of buying a Dell T620 server with two E5-2660v2 processors and 128GB of RAM. Dell told me that if I order 128GB of RAM I had to have 64GB per processor. Why is this? Let's say I'm ...
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1answer
116 views

How do I tell what component is preventing my computer from booting for the first time?

This is the build: Intel Core i3-4130T Haswell MSI H81M-P33 LGA 1150 Intel H81 CORSAIR CX series CX430 430W ATX12V v2.3 80 PLUS BRONZE ADATA XPG V1.0 series 4GB 240-Pin DDR3 SDRAM DDR3 1600 (PC3 ...
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1answer
30 views

When connecting to computer A from computer B over a local network, when does computer A's CPU get used?

I am planning on setting up an old computer as a media center, linux web server and backup storage device. It's loud and ugly so I'm going to run it in my basement. I've got it hooked up to my ...
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2answers
97 views

One core at 3.2 GHz, one at 3.19 GHz - what's wrong?

I have an i7 which is supposed to be running a clock speed of 3.2 GHz. However, in the System dialog it shows 3.2 and 3.19 GHz. and in the task manager, it also shows 3.19: What am I missing ...
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1answer
5k views

How to reduce Google Chrome's CPU usage?

I have started using Google Chrome (up to date) on Windows 7 (everything up to date) on a clean install I did a few days ago and compared to Firefox I am seeing huge CPU spikes (up to 100% CPU ...
3
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1answer
127 views

What does 4 + 1 CPU cores mean?

For example, the Nvidia Tegra 4 is described as having 4 + 1 CPU cores. Is this simply a conventional way of saying that it has 5 cores, or does that phrasing imply something different? ...
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2answers
116 views

Why CPU emulation is slow [closed]

Different CPU (IA-32, ARM9 etc.) operations should be equivalent in their nature (move, read, write data etc.). It shouldn't be that painful for different CPUs to emulate each other. But seems like ...
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2answers
41 views

Does rapid CPU work load fluctuation wear out/damage components?

I recently downloaded BIONC (Berkeley Open Infrastructure for Network Computing) to donate some of my processing power. When this program is running, my CPU work load will fluctuate from 0% to 70% in ...
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1answer
73 views

Processor hanging and causing computer crash whilst playing games

Recently I upgraded my HDD to a 1TB and reformatted my computer (due to it suddenly taking several hours just to boot.) After that whenever I play games my computer would freeze up, become ...
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0answers
12 views

what is the meaning of some of these options in MSI CB2?

I was wondering what the meaning of some of the options in ClickBios 2 meant, and how they affect the performance. things like core vdroop offset control core OCP extender(what's the difference ...
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1answer
298 views

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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2answers
81 views

Is my CPU performing as it should?

Recently my frames in a game I play have dropped significantly. I am trying to troubleshoot this and have got the the stage of the CPU, as you can see I have an Core i7 3770k, and although I know a ...
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3answers
92 views

Emulating a system that's more powerful than the REAL system which is emulating it? [closed]

People often argue that emulation of big systems like PS4 are "impossible" on lower-end systems (Celeron running Windows 7 Pro, 2GB RAM, 1200 MHz FSB, crappy GPU) due to less REAL hardware resources ...
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0answers
42 views

My HP P6910 Core 2 Duo laptop runs very slow

My laptop is working very slow, CPU remains busy. Installation takes 4 to 5 hours. I have checked hard disk and RAM but no indications there. When I open the laptop I see the processor has normal ...
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1answer
608 views

Windows 8.1 Pro - CPU Usage Stays at 100%

About an hour ago, I noticed that my laptop had gotten noticeably slower. My laptop is extremely fast, so this extreme decrease in performance prompted me to look at the task manager. In the task ...
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1answer
33 views

Arctic Silver paste for a new laptop?

My new laptop will be delivered in a few days, somebody recommended me to apply Arctic Silver right away. Cost cutting has forced manufacturers to use very inferior thermal pastes and I will see a ...
3
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1answer
115 views

Why do we need multiple levels of cache memory?

In general a cache memory is useful because the speed of the processor is higher than the speed of the ram (they are both increasing in speed but the difference still remains). So reducing the number ...