As others have reported - when running gtx 480's in SLI after shutting down the computer and starting it back up you find that your drivers have stopped working and you are in low resolution.
First - I installed the 2nd card yesterday evening and everything ran just fine. I ran benchmarks, played games... all was well. I shutdown the computer for the night - this morning, drivers aren't working. Again, much like others have reported. The common theme seems to be either a reboot or shutdown an upon startup - wham! issues.
I researched other threads, all of which weren't terribly helpful. So I began my own testing based on what others have done.
I ran drivers 197.41 and 197.55 - both worked. I ran driver sweeper before each test.
197.41 = worked fine.
197.55 = worked fine.
Now during these two tests, SLI was not recognized in the Nvidia Control Panel. Now lets try to install the SLI enhancement patch.
197.41 + SLI patch = hard boot - drivers stop working
197.55 + SLI patch = hard boot - drivers stop working
Now, different bridges - including 3 way and two 2-ways had no effect.
Changing the slots had no effect.
I'm starting to think the SLI patch may be to blame OR the new drivers and incompatibility with the SLI patch. Of course, that is what makes windows recognize a SLI setup and enable it to run. Could we have a forum moderator comment on the stability of this patch with the new 400 series? Note
: My motherboard and all other components are free of problems. I have retested 260's in SLI and have had no problems. Everest Ultimate recognizes both cards and will display their stats. EVGA precision recognizes both cards but "I" shows 1 gpu only - not 2 in SLI. Windows 7 64 bit nvidia control panel does not offer SLI option.
Lets solve this one people - its very uncool.
*** Here is something interesting which makes me suspect the SLI patch even more.
Read the FAQ:http://www.evga.com/articles/00463/
What drivers do I need to install to use this enhancement?
Although it is possible that this enhancement may work with older drivers, it has not been tested, thus is only recommended to use with the above driver.
"Version 26 (03.03.10) - Based on NVIDIA 196.75 Driver
<message edited by jdhoward on Saturday, April 24, 2010 5:25 AM>