Message boards :
Number crunching :
Calling ALL nVidia 200 series GPU crunchers
Message board moderation
Author | Message |
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shizaru Send message Joined: 14 Jun 04 Posts: 1130 Credit: 1,967,904 RAC: 0 |
Let's see if this gets anyone's attention... Contrary to common knowledge, it looks like running 2 tasks on ANY 200 series GPU when using the 270 family drivers is actually a good idea. Use Fred's Performance Tool and find out for yourself:) Optimize your GPU. Find the value the easy way. Thanx again Fred! |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14650 Credit: 200,643,578 RAC: 874 |
See the reply to your general comment in the other thread. Remember that Fred's tool is an artificial benchmark environment, with an identical WU running in each thread, and both WUs started at the same second (which will have an effect on the early CPU-based startup times before GPU crunching gets going fully). Give it a test in the real world too, before you come to final conclusions. (Oh, and BTW, the packaged WU in Fred's tool last time I looked was an old stock reference WU, which pre-dated the update to setiathome_enhanced) |
shizaru Send message Joined: 14 Jun 04 Posts: 1130 Credit: 1,967,904 RAC: 0 |
Richard, I sure hope you didn't take offence to my posts. And I hope you don't shoot the messenger when I point out that Zule's 260 saw a 13% boost in real-world conditions. |
tbret Send message Joined: 28 May 99 Posts: 3380 Credit: 296,162,071 RAC: 40 |
What would you expect to be the effect of a pre-enhanced work unit's use, if predictable at all, without regard to the 200, 400, 600 series issue? |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14650 Credit: 200,643,578 RAC: 874 |
(Oh, and BTW, the packaged WU in Fred's tool last time I looked was an old stock reference WU, which pre-dated the update to setiathome_enhanced) I asked Joe that at the time. I hope he doesn't mind me quoting his answer: It's the unmodified reference WU from the project source. So it has the old Classic SaH beam width of 0.1, AR is 0.775, chirp resolution is 0.333 etc. - the 'test environment differences' being WUs starting together (not overlapping the CPU phases of different WUs), always the same WU, etc. What I've read since then suggests that newer revisions of Fred's tool may include varied WUs with current processing parameters, but I don't know if he's found a way of staggering the start times. |
tbret Send message Joined: 28 May 99 Posts: 3380 Credit: 296,162,071 RAC: 40 |
- the 'test environment differences' being WUs starting together (not overlapping the CPU phases of different WUs), always the same WU, etc. I think I understand the implications of what you have explained, thank you. |
Tazz Send message Joined: 5 Oct 99 Posts: 137 Credit: 34,342,390 RAC: 0 |
Tried the benchmark tool on my old GT240 with driver 285.58 One at a time = 10:25 Two at a time = 09:26 I tried two at a time back when it was my new GT240 and it crapped out on me, very unresponsive system. I'll keep it going @ 1x </Tazz> |
shizaru Send message Joined: 14 Jun 04 Posts: 1130 Credit: 1,967,904 RAC: 0 |
I think that may have more to do with the Celeron than the 240. During the Great Seti Outage of '09 I gave Rosetta a shot on my 2.8GHz Celeron and the poor thing choked. The Atom I'm running now is slightly better at not freezing up on me, but it prefers to run at around 85-90% instead of full throttle. Maybe you could try dialling that Celeron of yours down a notch, if you haven't already. Regardless of the 1task-2task thing... Question: When I find some time, I'd like to run Fred's tool using drivers 270, 275, 280 and 285. Any ideas how I could get a more "typical" WU into Fred's tool? Richard? Anyone? |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14650 Credit: 200,643,578 RAC: 874 |
I think that may have more to do with the Celeron than the 240. During the Great Seti Outage of '09 I gave Rosetta a shot on my 2.8GHz Celeron and the poor thing choked. The Atom I'm running now is slightly better at not freezing up on me, but it prefers to run at around 85-90% instead of full throttle. Maybe you could try dialling that Celeron of yours down a notch, if you haven't already. Regardless of the 1task-2task thing... I would have to download the new version and see what it's got inside already - but today is going to be a bit busy on Beta. Remind me if I don't get back to you, please. |
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