Originally Posted by whipple16
1 - both are connected to the card in slot 2 the other card is in slot 4 (bios says both cards are running at x16 via nf200 chip) I have tried all different combinations and nothing worked.
2 - both connected DVI to DVI
3 - left is the main and it is set at 59, 60 is not an option
also everything works fine when i put my old single 470 in. could be be a gpu problem?
-When the left (main) monitor reverts to a lower resolution, does this happen at startup only? In other words, after booting up into Windows Desktop, can you manually raise the resolution back to its native? If you do this, will it revert back again immediately after?
-When you added the 2nd GTX470, did you do a clean install of the newest driver? If not, do it.
-One way to check to see if the 2nd GTX470 is bad, try switching the 2 cards from their slots and see if the problem goes away or remains.
-When you said 'slot 2' and 'slot 4' with x16/x16 + NF200 in BIOS, it seems that you are using 3-way SLI mode for the two GTX470s. That is, the 2 red arrows in pic 1 below.
I would suggest you to use slots 1 and 3 instead. The 2 cards will run at x8/x8 but the performance loss going from x16/x16 to x8/x8 is so small that it is insignificant in gaming. And, using the NF200 will introduce a couple % latency as well and so this might just cancel out the already little benefit of x16/x16 over x8/x8.
This move might or might not relate to your current problem but is still a good move.Edited by windfire - 8/5/11 at 1:46am