I'm doing 2 concurrent on my GTX 970, GPU load is fluctuating between 60% to 72%. The 2 I completed so far paid quite poorly for GPU tasks, one ran 4.7 hours for 16,448 credits, the other 5 hours for 17,400 credits. No 500,000 and higher credit tasks for me, like some others are getting.
Can't think of a reason credit is so erratic unless CreditNew is being used. Unless perhaps the admin is mucking around changing the credit rate with little idea of what he's doing.
A resend with a shorter deadline caused 1 task that was almost finished to stop processing at 85% complete, grrr. When I paused that resend the original task started again from the start. Checkpoints aren't working on my computer even if the admin says they are.
So yes, quite flaky at present, some of the old resends that I let run for a while were showing that they would take over 30 hours to complete. So I aborted those ones. Think I'll give it a miss too after these 2 current tasks complete. They're going to run about 9 hours. If I'm going to risk doing GPU tasks that long I'd prefer more reliable GPUGrid tasks, plus I'd get a more generous and consistent credit rate there as well.