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Sandy Bridge: Prime95 w/HT on or off?

post #1 of 6
Thread Starter 
So i'm curious if when running P95 should i have HT on or off?

also for the sake of test/comparions with other 2500k/2600k should i have it on or off? Whats the norm?

I thought i read somewhere that HT add roughly 8-10 degrees.
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The Witchknight
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post #2 of 6
It "doubles" the amount of cores, and it will give you more Mhz's with same voltage and amby even lower temps, and HT off is better for gaming, but if you use anything that can use over 4 cores, HT kicks on and then it is much better to keep on. For gamers OFF, for pretty much everything else ON. But I'd keep it on, sense unless your planning on Tri-Sli the extra Mhz's won't do none.
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post #3 of 6
Hyperthreading on if you use programs that utilize HT or more than 4 cores. Not even sure if photoshop and video editing does that.

HT in games and the standard browsing, email, web surfing doesn't improve performance very much, if at all. Then sometimes it slows down a couple games with HT on. (read it somewhere in a bench review on Anand or something a long time ago)
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post #4 of 6
Depends whether you use HT or not. You should do the stress testing for the way you plan to use it regularly, if you use things that take advantage of HT it is a benefit to leave it on.
Can your motherboard save overclock profiles in the BIOS? If so set up a stable overclock for both HT on & off, just have to restart & load a profile for multithread work or gaming.
    
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post #5 of 6
Thread Starter 
Quote:
Originally Posted by FtW 420;12905512 
Depends whether you use HT or not. You should do the stress testing for the way you plan to use it regularly, if you use things that take advantage of HT it is a benefit to leave it on.
Can your motherboard save overclock profiles in the BIOS? If so set up a stable overclock for both HT on & off, just have to restart & load a profile for multithread work or gaming.
Thxs this pretty much what i was thinking, and while i did consider doing profiles, i don't believe i'll care to reboot. I know its a minor thing, just preferrece really, but i guess if i knew that i was only gaming for the day i possibly consider it, though really it wouldn't be needed as i can't imagine needing such a minor difference simply for gaming.

I am planning to use the profiles for testing purpose though, when i find a stable setting at a clock speed i'll save it and then try another setting.
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The Witchknight
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post #6 of 6
Even though i use it very rarely, i figure that was one of the few reasons i got a 2600k instead of a 2500K. I leave it on and i've booted as high as 5.6 and run 5 24/7. I think i could probably boot higher but i havent tried.
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