How single core and double core differ from each other

[chanpreet singh]

Hello,
what is single core and what the dual core is?

 

[ghnader hsmithot]

a single core is a single calculation unit or processing unit that executes calculations.
Dual core means a cpu with two calculation units or two processing units.

The difference in performance of dual core and single core varies on the software and how much software you are running on your computer.
Most likely that is a dual core would suit a wider range of your needs such that you can run two software simultaneously.

 

[HostileDonut]

^+1

 

[v-2samrc]

dual core makes computer fast regarding having double processor in single dye. Like if you have P4 3 GHz processor then your overall computer speed is 3 GHz. In dual core having 2 processor like 1 is 1.5 GHz so overall 3.0 Ghz but it having some new special instruction for graphics & some newer so it will handle multi tasking is very fast.

 

[Herr_Koos]

Core speeds do not add together. 3GHz single core has one CPU core running at 3GHz. 3GHz dual core has TWO CPU cores, each of which run at 3GHz.

Think of adding CPU cores like painting a wall (crude example, but bear with me). One guy can paint the wall in 10 hours. Adding second guy with his own brush and ladder means you should be able to paint the wall in 5 hours. Each guy works at the same pace as before, but because there are now two of them, the job gets done faster.

 

[ghnader hsmithot]

Now we see people who say their HP with bad cooling and a bad overclocking mobo is 5.2ghz.

 

[theDanijel]

I agree with Herr_Koos, the theory is right. In practise it is something worse. With 2 cores you do get about double performacne compared to a single core. But further on it gets a different scale, since to get about 3 times the performance compared to a single core you need 4 cores, to get 4 times the performance you need 8 cores, 5 times the performance you need 16 cores and so... And that is the case where your system has good multi thread performance.
To put it in the wall painting metafore where one guy can paint a wall in 10 hours, if you have 10 guys, they will probably get in each others way and they need to work out who is working on what part of the wall, so the job will not be done in an hour

 

[ghnader hsmithot]

I agree with Herr_Koos, the theory is right. In practise it is something worse. With 2 cores you do get about double performacne compared to a single core. But further on it gets a different scale, since to get about 3 times the performance compared to a single core you need 4 cores, to get 4 times the performance you need 8 cores, 5 times the performance you need 16 cores and so... And that is the case where your system has good multi thread performance.
To put it in the wall painting metafore where one guy can paint a wall in 10 hours, if you have 10 guys, they will probably get in each others way and they need to work out who is working on what part of the wall, so the job will not be done in an hour

no not actually right.Lets say that you have one truck that goes at 20 km/h and that you have two trucks that can go at 20km/h you dont actually move faster at all.But when the two trucks can CARRY more load than the one truck.

 

[HostileDonut]

no not actually right.Lets say that you have one truck that goes at 20 km/h and that you have two trucks that can go at 20km/h you dont actually move faster at all.But when the two trucks can CARRY more load than the one truck.

Exactly! Which will get the job done quicker in the end. Nobody would buy them if they didn't! :lol:

 

[HostileDonut]

Your load times on the internet will not be faster normally though.

 

[Emperus]

The wall painting metaphor doesn't works.. N guys (N>1) working on one wall will get the job done faster at the cost of bad finishing (one can easily see different layers).. Applying that to say a software such as video converter, the result might be a faster encode with choppy images in between.. The truck theory works better..