to hyperthread or not to hyperthread that is the question
Message boards :
Number crunching :
to hyperthread or not to hyperthread that is the question
Message board moderation
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merle van osdol Send message Joined: 23 Oct 02 Posts: 809 Credit: 1,980,117 RAC: 0 
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On an intel i7 machine (I have two different models) is it better to hyperthread or not. I have heard different opinions on this. I am running two gpu's (amd) r7's and r9's at x8/x8. I only use the cpu's to feed the gpu's. Thanks merle - vote yes for freedom of speech ID: 1726857 ·  |
kittyman     Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004
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On an intel i7 machine (I have two different models) is it better to hyperthread or not. I have heard different opinions on this. I am running two gpu's (amd) r7's and r9's at x8/x8. I only use the cpu's to feed the gpu's. My two cents, especially as you are only using them to feed the GPUs, would be HT off. Should be more efficient. "Freedom is just Chaos, with better lighting." Alan Dean Foster 
ID: 1726860 · |
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castor Send message Joined: 2 Jan 02 Posts: 13 Credit: 17,721,708 RAC: 0 
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Shouldn't make much difference in that setting, one way or the other. ID: 1726888 · |
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rob smith Send message Joined: 7 Mar 03 Posts: 22203 Credit: 416,307,556 RAC: 380 
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When I built my latest cruncher - the only one with an Intel processor I did a little (short) trial. First I ran it using the defaults that came up on build, hyper threading on, after a week or so I turned it off. With HT on I dropped the core count to 6 to feed the GPUs, but with HT on I left all four on. CPU times were quite a bit lower with HT off, as were GPU times, so I left HT OFF, and all four "real" cores crunching. (This "beast" has two GTX970s & 16gb RAM) Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? ID: 1726897 · |
 Zalster  Send message Joined: 27 May 99 Posts: 5517 Credit: 528,817,460 RAC: 242
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I would say leave it off Merle. I also have an intel Chip but it's one of the high end. With that one, I do have the HT on and it does help with that computer. But with the other intel (that I used to have) it didn't help at all. So I'd say leave it off ID: 1726904 · |
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merle van osdol Send message Joined: 23 Oct 02 Posts: 809 Credit: 1,980,117 RAC: 0
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I would say leave it off Merle. That high end you're talking about is probably that monster I saw a picture of with 4 big Nividia's. Must be one of those dream x16,x8, x4,x4 motherboards. :-) Thanks everybody! merle - vote yes for freedom of speech ID: 1726917 · |
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