295: Multi GPU Mode

Author	Message
Jack Shaftoe Send message Joined: 26 Nov 08 Posts: 27 Credit: 1,813,606 RAC: 0 Level Scientific publications	Message 6678 - Posted: 16 Feb 2009, 17:02:08 UTC Has anyone tried leaving this setting "Enabled" for a few days to see if it will run the tasks twice as fast? ID: 6678 · Rating: 0 · rate: / Reply Quote

Paul D. Buck Send message Joined: 9 Jun 08 Posts: 1050 Credit: 37,321,185 RAC: 0 Level Scientific publications	Message 6681 - Posted: 16 Feb 2009, 18:14:33 UTC - in response to Message 6678. Has anyone tried leaving this setting "Enabled" for a few days to see if it will run the tasks twice as fast? No ... And it is not likely I will be able to try as the Nvidia control panel BSOD if I try to open it ... ID: 6681 · Rating: 0 · rate: / Reply Quote

Jack Shaftoe Send message Joined: 26 Nov 08 Posts: 27 Credit: 1,813,606 RAC: 0 Level Scientific publications	Message 6683 - Posted: 16 Feb 2009, 18:44:12 UTC - in response to Message 6681. Last modified: 16 Feb 2009, 18:47:27 UTC Been running mine today like that, and I think it's limited to 240 of 480 cores while on. The one task I'm running right now is 25% done after 2 hours wall clock time. Kinda sucks considering that every time I disable Multi GPU Mode, my machine freezes during reboot.. Guess I need to revert to 32bit XP where I last had Multi GPU off and problem free.. grr.. ID: 6683 · Rating: 0 · rate: / Reply Quote

Dieter Matuschek Send message Joined: 28 Dec 08 Posts: 58 Credit: 231,884,297 RAC: 0 Level Scientific publications	Message 6687 - Posted: 16 Feb 2009, 20:35:36 UTC - in response to Message 6678. It took two days until I noticed that I had to disable multi-GPU mode. :-\| After a few minutes the fan got louder because the card has been hotter. Indeed, in multi-GPU mode it works only with 'half steam ahead'. ID: 6687 · Rating: 0 · rate: / Reply Quote

Jack Shaftoe Send message Joined: 26 Nov 08 Posts: 27 Credit: 1,813,606 RAC: 0 Level Scientific publications	Message 6696 - Posted: 16 Feb 2009, 23:50:29 UTC - in response to Message 6687. Indeed, in multi-GPU mode it works only with 'half steam ahead'. Thanks Dieter, unfortunate - I'd love to just run one task at a time much more quickly. ID: 6696 · Rating: 0 · rate: / Reply Quote