Comparing CPU speeds

[Jon123456]

Is there a chart somewhere that can help me estimate the difference in speed between two CPU's?

I ask because I have an iMac with a i7-3779 CPU @ 3.40 GHz and I am considering buying a Surface Pro 4 with i5 processor. I've no idea on the speed differences. I bought the iMac a couple of years ago, so I don't know if this is an older generation i7 and therefore perhaps slower than a new gen i5.

Anyone know?

Thanks,

Jon

 

[lamboman]

You're comparing the top-spec iMac with a desktop Ivy Bridge processor against a current generation ULV mobile part. The iMac isn't going to be all that much slower than the top-end consumer desktop Haswell or Skylake chips on the market.

The difference is so great that I'd be fairly crude and just compare an i7 MacBook Air against the iMac, then close the gap a bit to give you a better idea. Either way, the iMac will be significantly more powerful (regardless of clock, it's dual core HT vs quad core HT).

Geekbench etc. are synthetic benchmarks however they give a general idea of the differences.

 

[Ben Cole]

Passmark?

 

[RJC]

Another thing to look at is the Surface will only be dual core with two hyperthreading cores your current chip is quad core with 4 hyperthreading cores.

so 4 vs 8 threads.

 

[WYNIR0]

http://www.cpubenchmark.net/cpu_list.php

 

[joeyjojo]

Is there a chart somewhere that can help me estimate the difference in speed between two CPU's?

Speed difference... doing what? Your question is meaningless.

 

[Starbukc]

Depending on how many cores software uses, different CPUs will be more powerful.

 

[pingu666]

i use a surface pro 1, and it handles most things really well. laptops and tablets can easliy run into thermal throttling, so sustained performance can drop, but i have a partial work around, books and walls, the flat back of the surface means you can place it on a flat surface and transfer heat to that xD