6800GT power loss during gaming after oc...

after gaming for say 10-15 mintues with the card overclocked to ultra speeds the framerate drops in half all of a sudden. after the game is closed a window shows that theres insuffiecent power to the card. i also notice the red LED on the card is off as well when this message comes up.

the issue would seem to be the power supply cable might be coming loose. so i try the other pci-e power cable and the same thing happens. i also try restarting the computer but the cards (power im guessing) LED doesnt come on. i have to shut down the computer then startup again in which the LED comes back on.

this issue doesnt happen when the card is at stock speeds and the card is being cooled by an ac nv5.

any ideas how i can have the card overclocked to ultra speeds and not have a power loss issue?

forgot if this is thermal throttling or not but I think it may be

Run RivaTuner and keep track of the temps. Sounds like it may be overheating.

I assume you have a PCP&C, so I won't blame it on your PSU

temp results during gaming...

at stock speeds rivatuner recorded a high temp of 72c. i crank the speeds up to ultra spec and rivatuner records a high temp of 75c. interesting thing is the LED stays on and i dont get a power loss message. so thats good.

these temps seem pretty dang high to me. are these normal temps to see? how high is too high?

Chix4mat: yeah its a pcp&c supply.

thanks for your help guys.

Mine gets up to 81 during 3DMark (only one I've checked), I have the driver window open on my second monitor so that i can see it in real-time. I don't know comparitively if thats high or not since I just got this card. The "Notify when GPU core exceeds threshold" default value is 120 in the drivers, so I assume thats the meltdown point.

well a 6800gt with temps lower than 90c is good hehheeh... must not be a psu problem.. since it's a really good one..and the power light is on and working.. must be a mobo problem then? try reseating the card... or changing drivers.. I knew when my 6800ultra had problems like this I reseated it once and never happened again.

Update for me, I went back and installed the drivers that came with the CD (several versions out of date) and it played fine for awhile. Didn't have time to play long so it possibly could still have issues. But I was surprised it didn't happen sooner. Maybe its been drivers all along, though I had tried the three most current ones. Will post later when I get a chance to try.

my BFG 6800GT-OC just did this. I have a A8N-SLI and a Antec Neo 480W PS. I was playing far cry and the monitor went blank and the red led on the card turned off and I had to turn off the computer and restart it to get the video card to work again. I am using the 77.72 drivers.

Don't split power to the video card. Run a DIRECT power wire from the PS to the video card no splitters to other crap!

same issues again, thought they were resolved. temps peaked at 72c during BF2 reported by rivatuner. by the way its a bfg oc version using drivers 77.72.

all i can figure is thats its a heat problem.

man this blows.

what PSU are you running? sounds like it could be telling you what's really up.. the power to run your GT @ ultra is enough more to make it plausable that it could get starved @ 400/1100 by the PSU, when @ 350/1000 is was ok... just a thought.

EDIT - nm. youhave a ppac 510... good PSU... hmmm... some GTs just don't like to be OC'd much... try backing the memory off by 10mhz or 20mhz and test some more... my GTs can't get good OC's on memory, but the cores OC like champs... so I run them @ 401/1050 which is still very close to ultra performance, given that the memory timings are tighter on a GT, so that 1050 almost = the performance of 1100... not quite, but very close..