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What determines the speed/power of a processor?

Last response: in CPUs
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August 20, 2012 2:22:45 AM

Hi there, just a quick question.

What determines the speed/power of a processor?

For example, everybody says intel are better.

So what separates a an i5 3570k quad core at 3.4ghz from a Phenom II quad core at 3.4ghz?

Shouldn't they be almost the same? How does the architecture make that much of an improvement?

Hope this isn't a stupid question.

Cheers.
August 20, 2012 2:27:22 AM

Intel's core microarchitecture is more efficient than AMD

in the i5 vs Phenom ii example the i5 has better L3 cache
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August 20, 2012 3:47:39 AM

Great, thanks jaguarskx.

Another question. Can and where do I view the figures for Instructions Per Cycle? I've looked on the intel and AMD website and I'm unable to find information to compare the IPC of each processor.
August 20, 2012 4:30:08 AM

Okay, after some research I have found this wikipedia page on instructions per second

https://en.wikipedia.org/wiki/Million_instructions_per_...

There's a table that shows MIPS / Clock Cycles Per Second / Cores Per Die

It has the i7 2600k at 9.43
AMD Phenon X4 940 Black Edition at 3.5

9.43 / 3.5 = 2.7

Does that mean the 2600k is 2.7 times faster? Or am I looking at the numbers too simplistically?
August 20, 2012 1:18:29 PM

huggles12 said:
Okay, after some research I have found this wikipedia page on instructions per second

https://en.wikipedia.org/wiki/Million_instructions_per_...

There's a table that shows MIPS / Clock Cycles Per Second / Cores Per Die

It has the i7 2600k at 9.43
AMD Phenon X4 940 Black Edition at 3.5

9.43 / 3.5 = 2.7

Does that mean the 2600k is 2.7 times faster? Or am I looking at the numbers too simplistically?


http://en.wikipedia.org/wiki/Megahertz_myth

this might help
!