New video card doesn't like OC

[MaxBurn]

I am trying to swap in a Sapphire X1950XTX video card, I built the system last week and it has been fine till now.

Problem about 50% of the time there is no video and a BIOS beep code on boot with one long and two short = Video Adapter error. Happens on both warm and cold boots. If you get video on boot the system is stable and plays games fine or at least loops of 3dmark and a little half life EP1.

What I know:
-System is overclocked to 350FSB but is completely happy with prime95, burn in test and some game play with either video card at this speed.

-If you clock back to 266FSB the system detects the X1950XTX every time fine.

-At 266 or 350FSB the 7800GT is detected at POST every time.

-When the video is not detected a soft power cycle is all that is needed to correct it. Soft being click power button once and wait for it to turn itself off, not holding the button to kill it.


What I have done so far:
-Locked the PCIE to 100 in the BIOS, was set to AUTO.
-Tried +.1v on the PCIE
-Changed the init display first to PEG, has option for PEG2 and PCI, was set to PCI.

None of the above changed the situation. I think I will now investigate a motherboard and video card BIOS flash. Unless you all can think of an option that I am missing somewhere?


GIGABYTE GA-965P-DQ6 v3.3
C2D E6600 @ 3150
Corsair TWIN2X2048-8500C5
EVGA 7800GT CO 256-P2-N517-AX trying to swap for Sapphire X1950XTX

 

[mangyDOG]

What PSU are you using? A big overclock will suck more juice and the graphics card is no lightweight either. The soft reboot may be working because the components are already powered up.

cheers,
mangyDOG

 

[Mercutio]

I've tried about six different video cards on my 865P-S3, including (in a rare display of magnanimity) a 7900GT, a Sapphire x1900XT and an 8800GTX and not experienced anything like that, even in with extreme overclocking.

HOWEVER...

*All* the video cards I have tried (except a PCI one that can't do anything) have had issues with overheating when I actually use the 3D features of the card. I'm not 100% certain if the card itself is overheating or if the north bridge or some non-CPU component is melting down, but 3D gaming is definitely the road to instability for me at the moment, too.

 

[MaxBurn]

Ah, on a hunch I upped the volts to the PCIE to +.15 and the FSB to +.1. I can't get it to post with no video anymore so I guess it's fixed. I think it was the FSB that did the trick as I had previously tried upping the PCIE alone before with no results.

Hopefully stays that way too, I will be doing some extreme game testing in the next couple days

Oh and the PSU is a Seasonic S12-550.

 

[ddrueding]

I'm running a 7950 (see sig) and occasionally it will post to the wrong video out. If I have my projector turned on, I can see that it just decided to use that one instead of both. It still comes back after the desktop has loaded, but until then the screen is black.

 

[MaxBurn]

I spoke too soon. I removed the overclock completely now and I tested again more throughly than that first time. The card is more reliable this way but occasionally blue screens after or during 3D testing and then on reboot gives no video. Sounds like a defective card to me but these guys seem to think it could be that my Seasonic S12-550 might not be enough. What do you all think about that?

http://forums.techpowerup.com/showthread.php?t=30042


Everything in the computer:
GIGABYTE GA-965P-DQ6 v3.3
C2D E6600
Corsair TWIN2X2048-8500C5
WD740GD Raptor (hey its been good for me)
Some SATA 160gig Seagate drive
DVDRW drive.
Three 120mm case fans
x1950xtx video card

Do I shop for a new x1950xtx AND a 600+ power supply or what?

 

[Mercutio]

I think those guys mostly don't know what the hell they're talking about.
But then, I'm basing that on the god-awful signature graphics they're using.

Well, that and thinking that a 500W power supply isn't enough to handle a fairly vanilla computer like yours.

 

[time]

What Merc said.

You did hook up the power connector(s) on the card, didn't you?

 

[MaxBurn]

What Merc said.

You did hook up the power connector(s) on the card, didn't you?

LOL, yes.

 

[time]

:twistd: