Multi GPU BOINC help

Grimgoth · 9 Mar 2010 at 09:15

Ok trying to upgrade one of my rigs, originally had a GTX285 in second PCIe slot, driving a dvi-vga connection, running windows 7.
Ploppped in a 250GTS into PCIe slot number one, hooked another vga connection onto this to drive a seperate monitor (well, tv in this case).
On reboot, both cards detected, windows uses PCIe slot one as primary, and runs display off that. can't for the life of me get nvidia control panel or windows 7 to detect the old monitor to extend windows desktop.
The funny thing is on checking BOINC messages, its detected both cards, and its running the 285, not the 250.... which i guess is good, as I aint loosing any points by having this set up yet....just want the 250 in the game as well hehe

Grimgoth · 9 Mar 2010 at 09:30

right numpty. couldnt detect cos the vga adapter had fallen off. grr.

So now I can detect, extend, but BOINC doesn't want to use the GPU still. Any ideas?

Biffa · 9 Mar 2010 at 10:48

you can't run two different GPU architectures in the same computer as far as I am aware.

GTX285 is G200 and GTS250 is basicaly a 9800+ or G92 architecture

picnic · 9 Mar 2010 at 11:46

Biffa said:
you can't run two different GPU architectures in the same computer as far as I am aware.

Is this a Boink limitation or a general nVidia one?

br83taylor · 9 Mar 2010 at 12:03

you could maybe try the advice given here.

http://setiathome.berkeley.edu/forum_thread.php?id=56376

I was under the impression that BOINC could use different GPU types unlike Folding which can't.

Biffa · 9 Mar 2010 at 12:28

Yeah my bad. Looks like it might work after all with <use_all_gpus>1</use_all_gpus> in the cc_config.xml

Grimgoth · 9 Mar 2010 at 13:08

phew! you had me planning in my head how to move motherboards and cases and graphics cards again in order to maximise output....
almost hit a buy it button too!

Biffa · 9 Mar 2010 at 13:28

Worth a try testing, I only ever crunched with the same GPU type

Grimgoth · 10 Mar 2010 at 10:56

Can confirm that the above method works, have both running now.
i need to move out of the matx form factor though I think. everything is running really hot in there.

derk · 10 Mar 2010 at 11:29

Grimgoth said:
i need to move out of the matx form factor though I think. everything is running really hot in there.

I would be interested to know which matx board you have with sli mate.

Grimgoth · 10 Mar 2010 at 16:14

that would be the Asus Rampage II Gene. They also have a Maximus II Gene for s775.