My GTX 460 machine has been tearing through the sieve WUs at an alarming rate; I've seen 9:50 to 10:20 for completion times, and tasks never error out.

I'm a bit confused, though, as to why one particular task took so very long. (the one in the middle below)

My GTX 460 machine has been tearing through the sieve WUs at an alarming rate; I've seen 9:50 to 10:20 for completion times, and tasks never error out.

I'm a bit confused, though, as to why one particular task took so very long. (the one in the middle below)

214779753 150755940 165444 4 Jan 2011 4:01:19 UTC 4 Jan 2011 4:32:45 UTC Completed and validated 617.70 76.56 2,311.00 Proth Prime Search (Sieve) v1.37 (cuda23) 214779630 150755672 165444 4 Jan 2011 4:01:19 UTC 4 Jan 2011 5:39:35 UTC Completed and validated 2,488.47 74.14 2,311.00 Proth Prime Search (Sieve) v1.37 (cuda23) 214779504 150755673 165444 4 Jan 2011 4:01:19 UTC 4 Jan 2011 5:30:38 UTC Completed and validated 612.72 74.48 2,311.00 Proth Prime Search (Sieve) v1.37 (cuda23)

The task in question is this one - completed and validated just fine, but why'd it take over 4 times as long as every other?

All the sieve tasks use 0.36 CPUs, which on my P4 translates to 0.18 of 1 virtual core, and the whole system actually reads as having a bit less memory than the GPU it's running - if anything, I want to be sure I'm not heading down the wrong path by using a brand-new, overclocked Fermi card on a mostly-six-year-old computer.

Note that I have had tasks "hang" in the past, where they'll run for ~20 minutes and hit maybe 5% before I realize there's something wrong and abort them.

It would also appear, from reading some stderrs, that none of the sieve tasks I do ever checkpoint to disk, meaning that I cannot suspend them without having to restart them (and that's not always successful either).

So, is this normal, or should I change something?

As much as I know about GPUs and crunching on 'em, I'm not exactly familiar with how things work "under the hood," so to speak, with regards to apps like PPS.

Any pointers?

Hm... I though I'm alone. I though smth wrong with hardware or OCing, they are stable for weeks tough.

Same stuff (WU duration went up on somewhat 10%) on both my rigs. Video - GTX 570.

Same here...

During the day, the duration is about 10-15% longer per WU.

Has somebody an explanation for that?
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Yes!
my 470/460/9800 eduration all have about 10% longer than before,except my gt240 have the same time.

I read that topic. Although it's in English I barely understood smth. But to make long story it's OK and nothing wrong from my side :-) That's all I need to know