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

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High CPU temperatures (123C)

AIDA64 is telling me that my CPU package temp gets to 125C. That is incredibly hot. My cpu core temps stay at ~31C though. Should I be worried about a high package temp? What is a CPU package? Should ...
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1answer
35 views

How is multiprocessing related to cores and threads?

I am interested in the Intel Xeon E5-1650 v3 and the Intel Xeon E5-2643 v3 processors. They both have 6 cores and a clock speed of ~3.5GHz. However, the specifications from CPU-world (screenshot) show ...
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7answers
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Is it OK to use toothpaste instead of thermal paste when fitting a CPU?

I was told many years ago to do this by someone who at the time knew more than I did. The CPU was a celeron in the Pentium 2 era. It ran cooler with the toothpaste between the chip and the heatsink ...
2
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2answers
106 views

Windows 7 running slowly despite having lots of 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 ie excel to ...
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0answers
24 views

PC doesn't boot most of the time

PC is now dismantled down to: motherboard (Asus Z97AR) CPU (Core i7) PSU (750W) Motherboard and CPU are new, PSU is old. If you continuously turn the power on, then of, then on again, ...
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0answers
37 views

My Ghz is capped to 0,78 [on hold]

So I have this Lenovo G710 laptop and my clock speed is 2.27 GHz (max) but capped 90% of the time at 0.78 or 0.76 GHz. This laptop worked great, but one day, this just happened. Any help with this? ...
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1answer
232 views

Laptop's processor overheats and turns it off

Model: Samsung R590 CPU: Intel i5-450M 2.4Ghz -> 2.66Ghz OS: Windows 7 Home Premium 64 with SP1 (after restoring tested also without any updates) It has 4 years now. After 2,5 - 3 years it ...
3
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3answers
14k views

How to turn off SpeedStep in Windows 7?

I have an Asus N53SV laptop with Windows 7 64-bit. I need to calibrate profiler in NetBeans, and to do that I need to disable functions that lower the CPU frequency in my laptop. I believe it's ...
0
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1answer
22 views

Asus M5A78L LE upgrade GPU CPU [on hold]

My specs are: BIOS: BIOS Date: 11/14/12 10:20:05 Ver: 15.03 Processor: AMD Phenom(tm) II X2 560 Processor (2 CPUs), ~3.3GHz Memory: 16384MB RAM Available OS Memory: 16382MB ...
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1answer
35 views

Why do smartphones have up to eight cores but many laptops still only have two? [on hold]

I have been looking at buying a new smartphone as well as a new laptop. What has struck me as odd is that many smartphones now have quad cores or even octa cores, yet many laptops still only use dual ...
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2answers
91 views

What makes a better CPU more expensive? [on hold]

Example: I've a i5-3570k in my computer. ARK suggested price is $235.00 I've gone for a i7-3770k, but it's way more expensive, $342.00 Then you have a Intel Celeron G1820 for only $42.00 What makes ...
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1answer
69 views

Do ARM processors like cortex-a9 use microcode?

Do ARM processors (recent and old) use microcode? If so, then what for? Aren't their instructions simple enough to be executed directly without being translated into micro-ops?
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votes
1answer
24 views

Non-gaming Motherboard for games? [on hold]

I read that the Z97 is recommended even for non gaming rigs, is it worth 3 times the cheapest H81 Mobo, or 2 times the H87-H97. I still want to play games, but not necessarily optimized. I have a ...
2
votes
1answer
17 views

How to best manage the run of several processes?

My computer has 6 cores. I have to run 12 processes. Each process takes exactly 10 minutes. I want to consider (for the sake of the argument only) two scenarios: I run 2 processes successively on ...
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1answer
3k views

Intel Atom D2500, 64-bit mode

I have an Intel Atom D2500 processor which the spec site claims it supports a 64-bit instruction set. However, cpuinfo shows this: # cat /proc/cpuinfo | egrep "(processor|flags|address)" processor ...
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0answers
13 views

What parameters should I consider when comparing two CPUs?

When comparing CPUs, it seems that basic parameters such as the number of cores or the clock rate are not enough. For instance, on a popular French e-commerce site, Intel Xeon E5-2620 v3 (2.4 GHz) ...
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0answers
17 views

New computer freezes

Today I built a new computer with an AMD FX-9590. Installation and upgrading of ubuntu went fine. Then i wanted to render with blender. After some time the system froze. During reboot it froze again. ...
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1answer
54 views

How is microcode loaded to processor?

I read that microcode is loaded in the processor on each reboot. It resides on flash memory and when the machine is booted, it gets copied to the CPU. Or in the case of Linux, the OS itself has the ...
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1answer
123 views

What are the disadvantages of Xeon processors? [on hold]

I'm considering getting a (single socket) Xeon processor, instead of a Core i7 processor, for my entry-level workstation. (The motherboard I have supports both Xeon and Core i processors.) I'm ...
4
votes
4answers
9k views

How to automatically kill and restart a specific Windows application if it begins taking 100% CPU?

I have one program running in the background (so I can use a remote controller with my PC) but every now and then the program crashes and begins using 100% CPU (I have quad-core, so it's 25% CPU ...
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0answers
24 views

CPU Clock Dropping During Heavy Load, Why?

Why during a heavy load on my CPU (Dual core Athlon 64 X2 6000+ 3.1Ghz) does my clock speed lower to 2.7Ghz? My temps are maxing out to only around 55c, this is all according to CPUID Hardware ...
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3answers
89 views

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
59 views

How to find what is pegging CPU in linux kernel

The node of our hadoop cluster is running redhat5.3 2.6.18-194.17.4. (a old kernel version). We found some hosts are under 100% CPU utilization and specially all the CPU cores are on 100% sy% top ...
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0answers
54 views

Microcode, is it compulsory? [closed]

I understand that the microcode is actually a layer between the machine code and the hardware, used mainly in CISC processors. Do all the instructions in a typical x86 processor use microcode? Given ...
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0answers
15 views

CPU overheating [on hold]

I think it all started when I placed a new HDD (now I have 2 SATA HDDs), the CPU is 100 °C, but when I restart my PC the BIOS shows 85°C I think it's still a lot but what do you think might be causing ...
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0answers
26 views

Is Apple A8 lisenced by ARM Holdings? [closed]

I extracted the following statement from Wikipedia: The Apple A8 is a 64-bit ARM based system on a chip (SoC) designed by Apple Inc. What does this exactly mean? Is A8 lisenced by ARM Holdings, ...
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2answers
54 views

Why is it said that 'The longer the pipeline, higher the processor clock rate' [duplicate]

I have been recently going through the hyper threading technology of Pentium 4. The number of pipeline stages is high in P4 and is said that it will increase the speed of clock rate. How is that ...
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1answer
42 views

How to terminate System Idle Process?

Every time i start my windows 7, the CPU gets very high, up to 60% and i haven't opened nothing yet. I opened task manager and saw what process where using the most. In the CPU usage and i found that ...
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0answers
207 views

Is it possible to replace the Surface RT NVIDIA 1.4 GHz Tegra 3 Processor with an Intel i5 or i7?

Tear down difficulty aside, is it possible to simply remove the NVIDIA 1.4 GHz Tegra 3 Processor in a Surface RT and replace it with an Intel i5 or i7? I admit I am not much of a hardware guy ...
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2answers
97 views

Massive Computer Slowdown On Most Everything

I feel dumb asking this, being A+ certified and all that, but I'm not sure what to start at. So this problem has been getting progressively and progressively worse, and now it's to the point where ...
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0answers
23 views

How much barring does the CPU, BUS and Motherboard have on a pfSense system?

I am planning on turning an old Pent 4 system into a pfSense box using (4)100Mbps ports and I have a 50/50 fiber connection currently for $25/mo and was wondering if I would by at any rate slow the ...
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1answer
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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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1answer
34 views

Safety with CPU amount on Windows 8.1

I am trying to completely max out a Lenovo Edge 15 with an Intel(R) Core i7-4510U CPU with 8 gb of RAM( 16gb coming in the mail, also the max. It also has a Samsung evo 840 256 gb SSD. My concern is ...
0
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1answer
29 views

CPU Overheating at boot

I've had this trouble for months but this time got further and senseless. I have a DELL Latitude E6410 4GB Ram 2.40 Ghz and no battery only cord power source. I've already had this problem before and ...
0
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1answer
20 views

PC inspiron 1525 won't boot after upgrading CPU to T8300

My PC inspiron 1525 does not boot ater I changed CPU to T8300 and updated BIOS to A17,I upgraded RAM to 4GB.However it boots with the old CPU T4200.Anyone has suggestion to resolve this problem.
0
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1answer
27 views

Is Prime95 safe to use for stress testing on current generation CPUs? [closed]

Intro Prime95 has been recommended as a system stress testing program for a long time. This thread from overclockers.com, dated October 12th, 2004, suggests using Prime95 for stress testing because ...
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2answers
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Real CPU usage - Task Manager

I have question about CPU usage, why does the Windows Task Manager shows me different CPU usage? I tried make some stress test where it showed me CPU usage 100%, but Task Manager shows only 65% usage. ...
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4answers
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Strange cpuinfo, how many cores does these physical cpu has?

At the end of this post is my /proc/cpuinfo. I know the Physical cpu number is 2 grep 'physical id' /proc/cpuinfo|sort|uniq|wc -l 2 But how many cores does each cpu have? The 'cpu cores' shows ...
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0answers
14 views

PC wont boot when graphics card plugged in

I recently got new motherboard/cpu/ram, though the PC wont boot at all when the gfx card is plugged in. Gfx card is still old and quite outdated so I was thinking maybe it is imcompatible? PC ...
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0answers
25 views

Computer fully restarts with no POST under any significant load

Specs: i5 3570k GTX 670 Corsair HX750 PSU I built my desktop a few years back and it has worked like a charm up until the past week. Whenever I try to play any game, besides non-intensive stuff like ...
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1answer
32 views

Why is my motherboard's CPU temperature inconsistent with the individual core temperatures? [duplicate]

This image demonstrates what I'm talking about: The motherboard's CPU temperature is in green. The individual cores' temperatures are in red. I've tested the temperatures in three different ...
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0answers
114 views

Win 10 64 bit update requirements 64Bit cpu (CMPXCHG16b, PrefetchW and LAHF/SAHF)

So I'm currently trying to find out wheter or not it would be a good idea to update my slightly dated notebook (win7, 64 bit) to windows 10 and the problem I have encountered is this: Microsoft states ...
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2answers
4k views

Is it possible to turn on PC without CPU, RAM and HDD

Is it possible to turn on PC without CPU, RAM and HDD ? If not, do I need CPU connected? The problem that I am actually solving is that I cannot turn my PC on and most probably it is an issue of ...
0
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1answer
44 views

Laptop shutting down automatically - BIOS overheating [closed]

My 4 year old laptop shuts down automatically with an error message 'The System has prevented from Bios overheating' when try to restart the laptop. It happens often and it was working for at least ...
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0answers
28 views

VT-X prevents boot

this is what happened. I was trying to run virtual box on my computer, but it gave me the error message, that I needed to activate VT-X. So, I booted into the bios and set the option for Intel ...
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0answers
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Sudden shut down & no boot after

My PC worked fine until a few days ago when it started to suddenly shut down after a few minutes of playing some games. Also, when I was trying to power on, the aux fans ran but the cpu would not ...
0
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1answer
54 views

What is the difference between CPU and Core temperatures? [duplicate]

While trying to figure out why the performance of my machine has suddenly severely degraded, I noticed that although CPU temperature is being reported as 45C while idle, the temperatures of all 6 ...
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0answers
29 views

Upgrading into an i7 from a laptop with i3

I have an HP Pavilion g7 which, for all practical purposes, operates as a desktop rather than a laptop. It never leaves my home office. I'm in need of some hardware upgrades yet I'm on a tight budget ...
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0answers
33 views

Black screen for about 20 minutes between boot screen and logon screen?

My specs are: Windows 7 Ultimate, 16 Gb ram, Processor: Intel(R) Core(TM) i5-2300 CPU @ 2.80GHz, 2801 Mhz, 4 Core(s), 4 Logical Processor(s), and the drive with my OS on it is an SSD. A problem I ...
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16 views

How to Match Memory to FSB (pre IMC)

I have the following hardware: P35-DS3L supporting FSB 333/266/200 Mhz, quad-pumped. Four dual-channel slots. E2180 currently @ 2.00Ghz (200.00x10) I plan to raise the FSB to 266.66. This is my ...