i7 2700k low Gflops

Wazz-1 · 23 Apr 2012 at 20:59

Just noticed when running IBT my Gflops have gone from 126ish when i first overclocked my chip, down to 98 - 100 now, not changed any settings :confused:

anyone know why this is ?

wazza300 · 23 Apr 2012 at 21:00

tested without multithreading enabled? try with it turned off its just ibt not the cpu,gflops should be a lot higher with multithreading disabled

Wazz-1 · 23 Apr 2012 at 21:10

I'll try that now, although dont know why i would have had it off in the first place!

wazza300 · 23 Apr 2012 at 21:12

Keep it enabled for the rest of the time,its just ibt shows less gflops with it enabled Idk why

Wazz-1 · 23 Apr 2012 at 22:00

Thats more like it

Cheers mate you put my mind at rest, thought i had degraded my chip benching @ 5+ GHz with a high vcore :eek:

must have had hyperthreading off when i first overclocked, i always have it enabeld thats what i bought it for, encoding etc

Thanks again

Justintime · 23 Apr 2012 at 22:26

There are a number of resources that are shared between the threads like cache etc.. If the threads are competing for said resources then you'll end up with a performance loss. Hence with HT off you have less threads and less competition, equals a performance gain. This is why some unoptimised software can run worse with HT on, this is how i understand it anyhow.

wazza300 · 23 Apr 2012 at 22:54

a good test to see the advantage boost of multithreading is cinebench cpu test,youll see how much higher the score is with it enabled

Wazz-1 · 23 Apr 2012 at 22:55

Justintime said:
There are a number of resources that are shared between the threads like cache etc.. If the threads are competing for said resources then you'll end up with a performance loss. Hence with HT off you have less threads and less competition, equals a performance gain. This is why some unoptimised software can run worse with HT on, this is how i understand it anyhow.

Thanks for the info, i do like to understand why these things are, it makes sense when you put it like that.