• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

12V drop on SLI system > crash?

grimdar

Junior Member
Hey guys
First off, system specs:

A8n-SLI Deluxe
OCZ Modstream power supply 450watt
Athlon 64 3200+
Dual 6600GT's pci-e sli
1GB Corsair Value
WinXP Sp2

I've been having problems with BSOD problems for half a year now. It's very random and there are several culprits. (not to mention, aggravating the hell out of me).
It ALWAYS freezes when playing games, never at the desktop level.
My first suspicion was 6600GT's since the BSOD always says the faulting module is "NV4_disp.dll", and event viewer mentioned it entered an "infinite loop". I've tried a motherload of different forceware drivers, doesn't make a difference.

I know it's not heat related, I've checked and rechecked all temps and everything is in order.

Then I thought it was my crappy RAM, so I memtested the hell out of them and no errors whatsoever.

Then I started looking at my voltages and noticed my 12v shows @ 11.52v and dips down to 11.33v when under heavy load in games. I know 12v readings are sometimes not accurate but is it supposed to drop like that under load? Would this cause BSOD reflecting nv4_disp.dll?

I don't have enough money to drop on a new powerful power supply AND a new video card at the same time so I'm really trying to pin this down. I know for a fact it's one of those two.
Some help GREATLY appreciated
 
By the way, here's a log file of my 12v voltage reading as I loaded LOTR: BFME 2 and started a new map skirmish:

Seconds / +12V / -12V

1496 11.52 -2.08

1499 11.52 -2.08

1502 11.52 -2.08

1505 11.52 -2.08

1508 11.52 -2.08

1511 11.52 -2.08

1515 11.52 -2.08

1517 11.52 -2.08

1521 11.46 -2.08

1524 11.46 -2.08

1527 11.46 -2.08

1530 11.46 -2.08

1533 11.52 -2.08

1536 11.52 -2.08

1539 11.52 -2.08

1542 11.52 -2.08

1545 11.46 -2.08

1548 11.46 -2.08

1551 11.46 -2.08

1555 11.46 -2.08

1557 11.46 -2.08

1561 11.46 -2.08

1564 11.46 -2.08

1567 11.46 -2.08

1570 11.52 -1.99

1573 11.52 -1.99

1576 11.52 -1.99

1579 11.52 -1.99

1582 11.46 -2.08

1585 11.46 -2.08

1588 11.46 -2.08

1591 11.46 -2.08

1594 11.52 -2.08

1597 11.52 -2.08

1600 11.52 -2.08

1610 11.52 -2.08

1613 11.33 -1.99

1616 11.33 -1.99

1619 11.33 -1.99

1622 11.33 -1.99

1625 11.39 -1.99

1628 11.39 -1.99

1631 11.39 -1.99

1634 11.39 -1.99

1637 11.46 -2.08

1640 11.46 -2.08

1643 11.46 -2.08

1646 11.46 -2.08

1649 11.33 -1.99

1653 11.33 -1.99

1656 11.33 -1.99

1659 11.33 -1.99

1662 11.52 -2.08

1665 11.52 -2.08

 
Pull one of your 6600GT's out of the system and try playing games on just one of them. If you still get blue screens you know it's not power related. If you don't get blue screens it could be power related or one of the cards is going bad. In that case, try one card at a time for a day or two and play games on it. If both cards individually play your games just fine, then i'd suspect the power supply when in SLI mode.

 
Back
Top