CUDA probs and other things

Quote:

Hi,
I got 2 PCs with one Nvidea Geforce 460 each.
http://einsteinathome.org/host/3947978
http://einsteinathome.org/host/3947696

I got the following problems:

1) When only 1 CUDA task is running on 3947696, BOINC estimates the time for computing one WU to be an hour. That's close to the real execution time of 0:58. However, when I run 2 CUDA task on the PC, BOINC estimates the execution time to be 21 hours while the real value is only 1:25.
That means, that even if I set the buffer to a value of 10 days, BOINC will only download about 22 CUDA WUs and those WUs get computed in about 7.5 hours. Since this PC is disconnected from the internet during night for about 8 hours, it happens often that the Geforce 460 has not enough work to do.
It also means, that hundreds of CPU WUs get downloaded too and those WUs need many days to compute, which means my wingmen have to wait for a long time before they get their credits.
Is there any way to get more CUDA WUs?

Maybe...but it would involve switching things manually. If you switched to the single wu crunching and set your cache to 10 days you should get a ton on units, then switch back to dual wu crunching for the night. then i nthe morning report all those units and get more, then in the evening switch again to fill up the cache for the overnight.

Quote:

2) Although both PCs got the same graphics card, the one with more memory and better Processor (3947696) is a lot faster when crunching CUDA WUs (about 35%). Letting the CUDA task on 3947978 have more processor time doesn't change anything. Any idea how I can improve the slow PC (3947978)?

You could make sure the drivers are the same on both but that probably won't help. The simple answer is no there is probably not alot you can do, the pc's and the OS's are different and that means the motherboards are different, the ram is different, the hard drives are different, lots of things different all contributing to different crunching times.

3) This morning, when 3947696 reported the completed WUs back to the server, a lot of WUs were errorous.
The log says "WU download error: couldn't get input files" and "MD5 check failed". Some of those WUs have 0 CPU time which means there was no computing at all while others have very high CPU time values. How can the CPU time be 5000 seconds if the logs says that it couldn't get input files? It's the first time this happened so I am asking myself what went wrong.

Thanks in advance for helping me.