No problem for me also.

No problem for me also.

The performance of these workunits on Linux is ~3 times better than on Windows.
There is no much difference between XP or 7 regarding these workunits.
I've aborted another one, it was 12% complete after 5 hours. It's not so popular.
I've suspended every CPU task to see if there's any improvement in GPU usage, and my GPU usage's gone up by 3% to 11%.
I still consider these workunits as a waste of resources (on Windows).

No problem for me also.

The performance of these workunits on Linux is ~3 times better than on Windows.

Linux GTX 680:
Run time 44,471.89
CPU time 38,477.50

W7 (GTX660Ti, GTX470):
ala_structure_881-NOELIA_sh2forces-3-5-RND6660_1 3934692 139265 12 Dec 2012 | 0:34:09 UTC 13 Dec 2012 | 7:08:28 UTC Completed and validated 86,697.19 78,124.14 79,375.00 Long runs (8-12 hours on fastest card) v6.16 (cuda42)
ala_structure_241-NOELIA_sh2forces-1-5-RND3374_3 3931355 139265 11 Dec 2012 | 19:34:19 UTC 13 Dec 2012 | 1:47:29 UTC Completed and validated 88,036.52 79,443.15 79,375.00 Long runs (8-12 hours on fastest card) v6.16 (cuda42)

I don't know what else (HA-SOFT, s.r.o.)'s Linux system was doing, if anything, (possibly some WCG or Rosetta CPU tasks) but if it wasn't I would say it's roughly twice as fast as W7. If it was crunching CPU tasks then I would agree it could be close to 3 times as fast. My tasks were initially run while crunching CPU tasks. Around half way through I optimized for the GPUGrid tasks.

The limiting factor on Windows appears to be the CPU requirement, hence the GTX470 was almost as fast as the GTX660Ti.

Even on Linux, and assuming it's 3times as fast, GPU utilization would only be ~39%. If the research is so important, make it Linux only, or better still, make an mt app and feed the GPU properly.

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I don't know what else (HA-SOFT, s.r.o.)'s Linux system was doing, if anything, (possibly some WCG or Rosetta CPU tasks) but if it wasn't I would say it's roughly twice as fast as W7. If it was crunching CPU tasks then I would agree it could be close to 3 times as fast. My tasks were initially run while crunching CPU tasks. Around half way through I optimized for the GPUGrid tasks.

6 HT Cores WCG
2 HT Cores left for GPUGRID

Thanks, ~3times as fast it is then ;)
If the utilization really is ~39% on Linux with 6CPU threads used by WCG, then it might mean it has potential to rise to ~50% by using less CPU cores.

At 50% GPU utilization I would be reasonably happy to run a few of these on Linux, but on a normal Windows crunching setup, with a highly recommended GPU and recommended GPUGRID settings, getting 7% GPU utilization isn't acceptable. If it was the GT640 would be at the top of the recommended GPU list! We don't buy high end GPU's to tick over at 7%.

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