Problems booting with two vid cards enabled

[McDub]

:mad: Here's the deal, all:
Trying to run my stuff in SLI but when I enable both video cards, the system hangs and the monitor goes into standby. When I try to restart, I get a BSoD and reboots after the windows loggon completes. I can only load in "safe" and disable one of the cards for it to run again. When using one card, everything runs fine and I can enable either card....as long as only one is enabled. I've tried both the beta and actual forceware release and I've ensured I have the latest nVidia drivers for the cards. BTW 400w case, so I don't think it could be a power issue.

[man_utd]

First off

WELCOME TO THE FORUMS!

Could you be more specific on the PSU, specifically brand of PSU, and the rail specs?

Also might try poking around on the asus forums. Might find some more info there. Also, have you tried both video cards individually?

[McDub]

Here's a link to the PSU...I'm not sure what info would be helpful.
http://www.antec.com/us/productDetails.php?ProdID=25400

And I can use either card with the monitor plugged into the top one, but I can only use one at a time. :bang head

[||BOD||FLUX]

just a real dumb question but did you flip the sli card over to enable the split for both pcie slots to work in tandom

[McDub]

Yeah, sure did. I triple checked my installation via the book and online.

[McDub]

In case you need some more info, here's what i did:
Plugged all the stuff in
Switched the SLI card
Powered the Mobo
Installed windows
Downloaded drivers for vid cards, forceware, sound cards, and BIOS updates for the
Vid cards and the mobo.
Installed each driver, one by one, rebooting after each one.
Went to control panel to enable the vid cards, the first one flashed the monitor black and came back on, when i did the second, it went off and computer hangs while the monitor goes to standby.
rebooted and i got a BSoD and auto reboot cycle.
Start in safe mode to disable one card (doesn't matter which one) and it starts fine.

[Memphis69]

all else failes drop kick that SUM biotch

[///M3]

I can't say that the PSU is the problem, but I can say that according to the ASUS manual the minimum power required is 350W and >17amps on the +12 rail. That puts your Antec right at max output of 18amps and 380W. These motherboards seem to be VERY sensitive to low power PSUs.

Do you have...
BIOS v. 1004?
nVidia video driver v. 66.93?
nVidia chipset v. 6.31?