Is there a problem as no work is being sent, apparently there are no long units and my machines have reached their daily limit.

Is there a problem as no work is being sent, apparently there are no long units and my machines have reached their daily limit.

I have been reporting 10 - 12 valid Nathan CB1 wu's (total) per day on 3 machines
I am not receiving any wu's at all.
Is it because I have aborted or cancelled wu's that I do not wish to process?

I have just checked my recent tasks and I have had over 140 wu's error out. I updated the Nvidia drivers to the latest 29573 CUDA version 4020 yesterday and am assuming that this is the reason.
Rolling back drivers.

I'm using the 295.73 drivers on WinXP x64. It's working well.

It was the 295 73 drivers that caused my problem so I have gone back to the 285 62
but using Win 7 x64 Ultimate

The 3 machines are all Win 7 x64 Ultimate
GPU's GTX 275, 285 and 570 all 3 have suffered the same fate when the drivers were updated.
i7 920 with the 285
i7 975 with the 275
i7 990 with the 570
No issues before the update
Have set preferences to show computers

Same problem here. Was also looking at joining Einstein@home for GPU calc but their forums also have messages about CUDA problems with newest NVIDIA drivers: apparently, CUDA stops working if a DVI connected monitor is used and the monitor goes/is put to sleep, and I believe there are some other problems as well.

I'm running Windows 7 x64 version (intel i7, nvidia gtx 570). Worked fine with the older nvidia WHQL driver.

For those crunching Long tasks only, I would suggest selecting to accepting normal tasks if no long tasks are available.
At present there are only 20 Long tasks waiting to be sent.

GPUGrid Preferences,

If no work for selected applications is available, accept work from other applications? yes

I'll put some new ones on soon, while removing some old ones. Others will add additional WUs in a week or so. Simulations take time to prepare, and it's better if we wait an extra week or two to be sure we have everything correct than sending wrong stuff and having to retract them in a week. Please be patient, and crunch for short tasks in the meantime. They are also important.

I'll put some new ones on soon, while removing some old ones. Others will add additional WUs in a week or so. Simulations take time to prepare, and it's better if we wait an extra week or two to be sure we have everything correct than sending wrong stuff and having to retract them in a week. Please be patient, and crunch for short tasks in the meantime. They are also important.

Spatz, thanks for your comments. You certainly have a point, and I will try to keep these things in mind. It's not lost on us how difficult it can be to get your systems up and running. It is one of the less ideal aspects of high performance computing. So many configurations, so many little details that can go wrong. We wish we could offer more support in that area. C'est la vie.

And you certainly are correct that long tasks should be longer to fully utilize the best cards, and we're conscious of that. My mistake with the "NATHAN_CB1" tasks was not optimizing the time for the faster cards, but rather averaging for all types. In the future we will be setting task length for the faster cards in the long queue. Of course, slower cards will still be welcome.

Again, thanks for giving your perspective.

Recently, some of the 'Long tasks' took ~3 1/2h on a GTX580. I think this is too short. It's too close to normal length tasks, makes other Long tasks look too long, and raises concern over the credit system as a whole. While it has allowed many to crunch with mid-range GPU's and get the full credit bonus, that's not the purpose of long tasks.