Tagged Questions
1
vote
4answers
183 views
Multi-core CPU: can I say I have a 3x2.1GHz=6.3GHz CPU?
I have an AMD A6-3500 three-core CPU. AMD System Monitor shows each core with a maximum 2100 MHz. This also shows in AMD OverDrive.
Does this processor run at the speed 3*2100 MHz?
Edit
Can I say ...
0
votes
0answers
30 views
CPU cores all different temps [closed]
Possible Duplicate:
CPU Core Temperature Variation
Running i7 X980 and it has 6 cores to it. Idle is typically 32c-38c is that normally for the cores to have different temps like that? Is ...
2
votes
1answer
55 views
How are benchmarks for multiple cores calculated?
I found this site to compare CPU's. http://www.cpubenchmark.net/high_end_cpus.html
What wasn't clear is how the benchmark for multiple core processors is calculated. If one CPU has 4 cores (such as ...
0
votes
2answers
147 views
Finding the number of Cores on my CPU in GNU/Linux
When I do cat /proc/cpuinfo I get the folowing information printed below. Can I conclude from this information
that there are 8 cores in my machine? I am interested in doing some parallel programming ...
1
vote
0answers
64 views
shared L2 in multicore: regarding miss per kilo instruction (MPKI) counting
I am using multicore simulator marss http://marss86.org. I am using 4-core simulation, with shared L2 cache. Each core is run for say, 100M instructions. Since different cores progress at different ...
2
votes
1answer
292 views
Windows BSOD when all cpu cores enabled
I'm getting a blue screen "A clock interrupt was not received on a secondary processor within the allocated time interval", just a few seconds after the Windows desktop is loaded. (For reference, ...
3
votes
2answers
160 views
How does a multi core computer freeze (at the hardware level)
I have a 4 core i7 computer that freezes. The display stays, but nothing will ever move again. This question is not about getting help on that particular problem, but a general question about how a ...
1
vote
0answers
239 views
Should I prefer processor speed (GHz) or core count? [closed]
I'm currently in the market for a new computer, so I'm curious about the recent trends of processor speed versus core count. Core count seems to be 'all the rage' these days, but things are really ...
1
vote
1answer
171 views
What are “hyperthreading” and “virtual cores”?
I'm new in this computer terms. So anyone can explain to me what "virtual cores" and "hyperthreading" are at greatest detail a layman can understand?
People told me that virtual cores are imaginary ...
1
vote
2answers
88 views
Clock frequency, number of cores , threads
I'm really confused.
What determines the speed of the CPU/processor?
Some compared a dual core with 2.8ghz and a 2.4ghz quad-core and say the quadcore is better.
But when it comes to a dual core ...
34
votes
5answers
2k views
Why is my dual-core CPU recognized as a quad-core one?
My processor is an Intel Core i3-380m. As you can see, it's 2 cores and 4 threads.
Although, both Ubuntu 11.04 and Windows 7 seem to think it's a quad-core CPU:
Why is this? Is it because there ...
6
votes
5answers
1k views
Is a higher core count or higher clock speed more beneficial to a computer's performance? [closed]
With lowering silicon costs and rising consumer needs, manufacturers seem to be pushing one of two things: clock speed and/or core count. With the way things are going, it doesn't seem that clock ...
0
votes
2answers
621 views
/proc/cpuinfo gives CPU info per core or per thread?
My CPU has 2 cores, so I can see two parts in /proc/cpuinfo.
But, I want to know if CPUs that support Hyper-Threading (or similar tech), will /proc/cpuinfo give CPU info per core or per thread (or ...
1
vote
1answer
79 views
What's a dual core? [closed]
Possible Duplicate:
Can someone clear up the terms Core Duo CPU, Quad Core, Dual CPU, etc.?
Does "core" mean CPU or memory or both?
I'm thinking of buying a new computer. But ...
1
vote
0answers
84 views
Interpreting CPU BenchMark for Multi Core Systems
What is the standard ways (if any) to interpret the results of cpu benchmarking for multicore systems relative to single core systems? I am trying to compare the Passmark result of AMD 64 Vs AMD ...
1
vote
1answer
288 views
Does using a hexacore CPU make sense?
I'm currently planning to upgrade my computer system and I want to exchange CPU, board and RAM. I already had a look at some hexacore-CPUs from AMD and would like to know if it makes any sense to use ...
8
votes
2answers
1k views
Force a single core program to use multi core
The title says it all, is there a way to force a single cpu core designed program (older programs) to use multiple cpu cores?
6
votes
3answers
208 views
Mixing CPUs in a multi-CPU system
Mixing types of RAM is not always healthy, but I am curious as to what happens (if anything) when mixing CPU types in a system.
Example:
8-Core 2.0Ghz Magny Cours CPU in socket 0
12-Core 2.0Ghz ...
1
vote
1answer
75 views
Oddity about declared multi-core CPU power?
I am having quite a hard time in understanding the output of cat /proc/cpuinfo on two 4-core Linux boxes here at work. Basically I am running algorithm experiments on the two machines (let's name them ...
1
vote
0answers
484 views
Core i7 vs Phenom II x6 [closed]
I have to made a setup for a PC that's going to be used to do heavy processing with ... Microsoft Excel ( -.-' )
Yep, I know how non-intelligent is make heavy processing with Excel, but I tried to ...
0
votes
2answers
805 views
11
votes
2answers
8k views
How to tell how many CPUs (cores) you have on Windows 7
I got me a nice new laptop and I want to know a bit more about the hardware.
How can I see how many CPUs my computer has in Windows 7?
(Note: Clicking on Start->Right clicking on Computer-> ...
2
votes
3answers
476 views
Multi-core processor speed
Might be a basic question: is the clock rate (1.7 GHz, etc.) that is mentioned for multi-core processors (e.g., Intel i5, i7) the clock rate per core, or it is the total speed of all cores combined?
2
votes
1answer
615 views
Processor advertised with 2 cores but PC shows 4 cores
I recently purchased an Intel i5-650 processor. On the Intel site, this the technical specifications show that the processor should only have two cores.
...
2
votes
3answers
476 views
Multiple CPU not showing in task manager
I have an i7 intel core. Normally it shows 8 cpu's in my task manager, however for some strange reason it does not anymore. I can't recall changing anything. I noticed this problem when I wanted to ...
3
votes
1answer
97 views
Which property of CPUs is good for what?
Back in the days clock frequency used to be THE criteria to compare CPUs (or perhaps you had to take into account whether it was a DX or SX). The world was simple back then, but in these fast evolving ...
1
vote
1answer
1k views
What does clock speed mean in multi-core processors? [closed]
Possible Duplicate:
Clock Speed Calculation in Multicore Processors
If I see a CPU that says "2GHz quad core" on the box, does this mean that each of the four cores are running at 500MHz? ...
0
votes
1answer
43 views
Is it possible to set a more generic process affinity (automatically)?
I know with start /affinity X where X is a hex-number bit-masking the CPUs to be used a process can be started to use certain CPUs only. However, is there a possibility to state something like "start ...
2
votes
2answers
921 views
Multiple CPU cores in Virtual Box
When I was using Virtual Box in Windows 7, I could choose how many CPU cores to assign to the guest OS. Now I'm using Linux, and when I installed Virtual Box, I couldn't find that option. System ...
0
votes
2answers
315 views
Which model six-core Xeon processor does the new highest-end Mac Pro have?
Apple announced a new Mac Pro with up to 12 cores, and I'm having trouble finding the exact specifications of the six-core Xeon processor inside it.
I'm in charge of sourcing a few of these computers ...
4
votes
1answer
713 views
Setting permanent process CPU core affinities in Windows
I am planning on getting a new CPU and am looking at a quad core i5.
The reason for the quad-core is that I generally multi-task a lot for example running Visual Studio, Eclipse Aptana, Photoshop, ...
1
vote
2answers
331 views
Single core to Dual core and Interrupts
Does increasing the number of cores result in the increase in the number of interrupts that can be handled by that processor ?
4
votes
5answers
143 views
Upgrading from single core to dual core - Will throughput get doubled?
If i replace a single-core processor with a dual-core processor, Will it increase the throughput by two times ? If No, why throughput does not get doubled ?
9
votes
4answers
736 views
Why multi core processors?
Why are chips containing more and more cores? Why not manufacture a larger single-core processor? Is it easier to manufacture? Is it to allow programs to multithread using seperate cores?
1
vote
1answer
1k views
Linux 'top' utility widly inaccurate (more so for multi-CPU/core hardware)?
After using 'top' for long time, albeit basically, I have grown to distrust it's '% CPU' column reports. I have a 8-core (quad core Intel i7 920 with hyperthreading) hardware, and see some wild ...
7
votes
2answers
2k views
Hyper-Threading and Dual-Core, What's the Difference?
In a conversation with the network administator, I mentioned that my machine was a dual-core. He told me it was not. I brought up the task manager, went to the perfomance tab, and showed him that ...
4
votes
3answers
1k views
How to compare old CPU to new CPU?
I hope this question doesn't get closed at once :)
I have an old laptop, a Compaq NC4200, which is going its final laps around the track these days. Battery is dead, and everything kinda runs slow. ...
4
votes
1answer
180 views
Is my processor Intel Pentium D a dual core?
My processors is an Intel(R) Pentium(R) D CPU 3.00GHz. Does the D mean that my processor is a Dual Core?
6
votes
1answer
763 views
ffmpeg encoding on QuadCore
I am trying to push my server's CPU cores to the max, but no success.
Encoding 2-pass style, set my "-threads" to 128 . When running 2nd pass , the CPU seems to be at 98% usage, but first pass run ...
3
votes
3answers
431 views
Multi-core processors: Better performance running multiple applications?
I realize for single applications - the application itself has to be designed to take advantage of multiple cores. But what about executing many different applications simultaneously?
On my ...
2
votes
1answer
226 views
In a dual core processor, Do both the processors halt execution when an interrupt occurs?
suppose two cores of a CPU are running two threads parallelly, and an interrupt occurs one on of them, does the other processor also stop execution ?
1
vote
7answers
334 views
Multi core processors… are they really needed? [closed]
What things are multi-core processors needed for? I mean what type of things benefit from using multi-core ? Also are there anythings that suffer in performance for using multi-core... ie. they ...
8
votes
3answers
5k views
Why does my Intel i7-920 display 8 cores instead of 4 cores?
When I go to the task manager I see 8 processors but I know that I have 4. Why?
1
vote
3answers
5k views
How to enable multiple processors on XP SP 3?
I've got a Lenovo n100 laptop that's 3 years old. It dual boots the original Windows XP that came with it and Ubuntu, and I just now noticed that the XP installation, on the Task Manager, only shows 1 ...
0
votes
4answers
163 views
Per-Cpu utilization
I have read terms such as per-cpu utilization. Don't we have just one cpu in our machines ?
Also there are two directories cpu0 and cpu1 in the sub-directory /sys/devices/system/cpu ... Do I have two ...
3
votes
3answers
9k views
Safe temperature range for a Core 2 Quad CPU?
I've looked around for an answer to this for a while, and have found many conflicting answers. I've heard that it shouldn't be allowed to go higher than 45C or so, and I've also heard that 55C is a ...
6
votes
8answers
677 views
Choosing Dual or Quad Core [closed]
I was reading the Jeff Atwood post on this topic and was wondering how much of that is still true today. His post is from Sept. 2007. This question stems from another question I asked recently which ...
8
votes
5answers
700 views
What's the difference between multicore proc and multiproc system?
I wonder what's the difference between a dual core computer and a computer with 2 processors on the mother board.. I think it's something related with the threads but a I don't understand it very ...
13
votes
2answers
1k views
Does the Intel i7 offer real improvement over its predecessors? [closed]
As the questions title asks, do the new processors from Intel offer real, as in noticeable, improvement over the previous quad core ones? What does the i7 actually offer that is new or is it simply a ...
3
votes
4answers
2k views
How fast is each core in a dual-core processor?
My Macbook has a 2.4 GHz dual core processor. Because it has two separate cores, that means it can execute two functions at once, right?
So does that mean each core is approx. 1.2GHz each (for a ...
