Originally Posted by rob3342421
why do people turn hyper threading off?
only answer I can think of:
compatibility issues although I've never come across any :S
Well depends on what you consider "compatibility issues"
As posted above, games will respond to higher clock speeds, specially when compared on a dual gpu setup like you have.
Anything that is not coded for 8 threads is technically "not compatible" however they work just fine. They just do not take advantage of the power.
To the best of my knowledge there are not many, if any games coded for more than 4 threads. If you do some testing, open task manager and leave it in the backround, then play some games and ALT + Tab out and look at your cpu usage. Not many will be pushing more than 4 cores, leaving the 4 HT threads at idle.
So if you can reduce heat and bump up the MHz it may help...
However, other testing I have seen shows that you need some serious GPU power to see any gains in a i7 past 3.8 - 4.0 GHz. If you test a 950 @ 4.0 with a 460 vs a 950 @ 4.4 with a 460 you wont see much difference in FPS in games being the 950 @ 4.0 has already maxed out your card.
However being your on a dual card setup you may get the benefit.
Hyper Threading ony helps in apps that are coded for multi threads. I run a program called DVD Rebuilder Pro, it has commercial encoders for DVD encoding that will run 8 instances and max my CPU out for video encoding, it cut my DVD encoding jobs by about 35 - 40% in times. What would take me 35 - 40 minutes with my Q9550 @ 4.25 only takes me 17 minutes with my 950 @ 4.25..