Re: New core = significant production drop GPU
Posted: Sat Dec 08, 2012 6:04 pm
From what I've read around here, science from 2.25 is still good.
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I believe the science from core 2.25 is good they do internal testing before releasing a core. And there was a purpose for releasing it so that Kepler cards could fold, also from what PG members have said before there were some environmental variables added to help with screen lag. But for me the core is no where near as stable or fast as the 2.22 core is for Fermin cards as I posted the other day I lost 70% of the WU's I ran with it with a normally stable OC so it was double penalising me (The core has a 30% slower tpf and I had to drop the OC from 920 to 900 core clock and lost another 15%). It is really no big deal it is there project, my cards and 1 of the 4P's are doing other thing now where I feel they are being utilised to there full potential and getting adequate rewards for doing them.mmonnin wrote:From what I've read around here, science from 2.25 is still good.
In my experience they do run hotter, but I think grandpa is referring to all units even 'cooler' ones and it is pretty clear that TPF and PPD on 2.22 was a lot faster on the same units than 2.25 is. Prof Pande has said in relation to the memtest errors that 2.25 is 'stricter' on memory, this may be the better science they are looking for. Really we have no clear indication why the project has preferred 2.25 over 2.22 other than it looks like it is to be a unified core, works on Kepler cards, has environmental changes to reduce some previous lag issues and the more recent indication that it is designed to improve science by being 'stricter' on memory faults.mmonnin wrote:Some have mentioned the p7626 WUs run several degrees hotter than other WUs. Maybe close to that cliff for your card at the OC
Pande group doesnt have the bandwidth to make separate cores just for Kepler or just for Fermi. Kepler requires v2.25 so thas where the project is going. That is that. I can't believe all the crying over this. QRB will be back and make all this irrelevant.kiore wrote:In my experience they do run hotter, but I think grandpa is referring to all units even 'cooler' ones and it is pretty clear that TPF and PPD on 2.22 was a lot faster on the same units than 2.25 is. Prof Pande has said in relation to the memtest errors that 2.25 is 'stricter' on memory, this may be the better science they are looking for. Really we have no clear indication why the project has preferred 2.25 over 2.22 other than it looks like it is to be a unified core, works on Kepler cards, has environmental changes to reduce some previous lag issues and the more recent indication that it is designed to improve science by being 'stricter' on memory faults.mmonnin wrote:Some have mentioned the p7626 WUs run several degrees hotter than other WUs. Maybe close to that cliff for your card at the OC
Me, I personally preferred the 2.22 as a donator it gave me better results (eg points), but the project seems to prefer2.25 and I assume this is for the same reason.
Perhaps this weekends issues with the rollout of 2.25 and the G80 and ATI cards, will result in a clearer understanding of these things.
Your presumption.Pande group doesnt have the bandwidth to make separate cores just for Kepler or just for Fermi. Kepler requires v2.25 so thas where the project is going. That is that. I can't believe all the crying over this.
didn't bother to read the post I take it.PS. I have not seen for example, any response to this excellent post:
viewtopic.php?f=16&t=23074&start=30#p230056
Except of course that they cannot answer questions that they have no information on.That's what the site admins are here to do.
Nope, good communication benefits ALL...It doesn't give him or anyone else special treatment
Unfortunately the forum admins are exactly that, they're moderators for the forums and aren't in the loop so the best they can offer is educated guesses.mmonnin wrote:Big time spenders like Grandpa come and go. Its a fact of any DC project. It doesn't give him or anyone else special treatment because they spent money to get their competitive fix on.
Pretty sure Vijay has some actual science to do instead of answering our questions all the time. That's what the site admins are here to do. Just compare the post count between bruce and any of the PG staff.
I started folding back when WUs were single digits. I can remember 1.2 and 2 point WUs and was once in the top 100. Now a 580 running a p8057 did what I did my first few months in a matter of minutes. PG group have seen people complain about points for years and years and hardware not matching up to others. This is nothing new. The ones that stay do it for the science, not because their hardware isn't optimized due to PG changing something not to their liking.
It seems pretty obvious to me. They're forcing 2.25 because they have to support Kepler.Grandpa_01 wrote:What would be really nice is PG comes out and tells us why the forced 2.25, is it doing better science ? is it so people folding Kepler's will feel better ? is it to deal with the screen lag issues some are seeing ? s it that they need it for the future WU's because Kepler can not fold without it and 2.22 does not work properly on the new Kepler designed WU's. It is not that hard to give the reason if they are ligament reason's and would go along way toward PR after all we do give our time, $$$ and equipment to PG, and a little info and accountability to the donors is a very small price to pay for what is being given.
Thats a bit unfair, Grandpa has been with the project nearly 5 years now has 700m+ points and 29.5k WU under his belt, not exactly someone who comes and goes. Actually most of the big spenders stay with the project through thick and thin as they have invested a lot of money because the believe in the project's goals.mmonnin wrote:Big time spenders like Grandpa come and go. Its a fact of any DC project. It doesn't give him or anyone else special treatment because they spent money to get their competitive fix on.
What we do know is yes it is used to support Kepler and the environment variable was changed viewtopic.php?f=66&t=21571 also we know the cuda optimizations we never implemented viewtopic.php?f=66&t=22197&p=221635#p221635 as far as the nVidia statement goes it is possible, Fermin being faster than Kepler at running Gromacs certainly can not be good for nVidias sells, but I would not think PG would cripple Fermin for nVidia.codysluder wrote:It seems pretty obvious to me. They're forcing 2.25 because they have to support Kepler.Grandpa_01 wrote:What would be really nice is PG comes out and tells us why the forced 2.25, is it doing better science ? is it so people folding Kepler's will feel better ? is it to deal with the screen lag issues some are seeing ? s it that they need it for the future WU's because Kepler can not fold without it and 2.22 does not work properly on the new Kepler designed WU's. It is not that hard to give the reason if they are ligament reason's and would go along way toward PR after all we do give our time, $$$ and equipment to PG, and a little info and accountability to the donors is a very small price to pay for what is being given.
How is Kepler being supported? NVidia came out with a new version of drivers and a new version of CUDA. You have to install the new drivers and Stanford has to start using the new CUDA. Version 2.22 certainly uses the old version of CUDA and 2.25 must use the new version of CUDA. Can anybody honestly say they know that something else was changed? Why are asking Stanford what they changed. Is anybody complaining to NVidia? If not, why not?
Stanford respects their partners and isn't likely to deflect the to blame to NV even if my assumptions are 100% correct. It's better just to say nothing and wait for NV to fix the performances losses encountered in the current version of CUDA.