7900GS Problem! :(

D

dambrosioj

Weaksauce
Joined
Sep 7, 2005
Messages
118
I just picked up a New 7900GS the other day. Note this is replacing my 6800GS which was working fine. Installed the card and nothing on the screen. Fans power up so it sounds like the card is working fine just no video signal.

I thought I would go purchase another one just to make sure it wasnt the card. I installed the 2nd 7900GS by itself and still no video just the fan running.

Next I thought well maybe a power supply problem and its not getting enough power. So I went out and bought a 650W BFG Power Supply. Same thing still no video signal.

Next I upgraded my bios to 1016 hoping that would work and still no video. I am totally stumped now, anyone have any ideas on what could be going on or suggestions?

Note that I can still boot up fine if I reinstall my 6800gs.

Specs:
500W Silent Phantom PSU
7900GS Vertigo 256MB
Asus A8N-SLI Deluxe w/bios 1016
AMD x2 939 4200
 
Hmmm is that even possible? Its pretty new only bought a year ago if that as I recall.

If so anyone have any suggestions on a 939 Board that works with the 7900GS
 
Did you buy the same brand for the card?

I'd google it and see if any others are having the same problem.
 
Already googled, nothing came up as problems. Plenty of peolpe using them on the Asus board though.

And yes they are the same brand. PNY for both 7900GS
 
will i really really think u didn't attach the 6-pin extra power cord the card needs.
 
This may sound stupid, but did you plug in the extra power line to the vid card?
 
The cards probably fine its your system (probably your mobo) that is at fault. Have you tried putting in the old card and checking that it works as it used to. Also check the mobo's specs and if your PSU is the right rating, my gs's are on 400 watt PSU's check yours supports the limit of 400.

Ok I just checked out you mobo, and it should be fine with the card, I'm guessing the PSU is at fault or your using a wacky monitor config...
 
Like I said I tried two different monitors, I also bought a new PSU that is 650W Dual Rails and still no luck. Something else is going on here.

My 6800GS if I put it back in works fine boots right up into vista no problem. Soon as I put in one 7900GS I get just fans spinning and nothing on the display.
 
weird. maybe it's not seated all the way?

what if you reset the cmos?

do you have a DMM you could measure some voltages? if so, you should look up a read point and check to see if you're getting vgpu


edit: also, is the system otherwise responsive? meaning does it make beep for post and try to boot or nothing? you try both dvi ports?
 
try uninstalling your 6800 drivers, switch cards and see if it boots with the 7900?

Unplug the power cord to the video card and boot it up, it should say... Turn off your computer and connect power rail to video card or something or other. See if you atleast get that screen

is your SLI card fliped the right way?

pop out the battery on the mobo and unplug the main cord from the PSU to the wall and push the power button, that will "flush" the system of voltage. put the battery back in and plug it up and turn it on..

Those are all things I would try.

then an RMA
 
The card is fully seated. Already tried a CMOS Clear multiple times.

The only thing I didnt try is uninstalling my video drivers. I never thought that would matter since im trying to just turn on my computer with minimal stuff without the harddrives so I figured drivers would even matter right?

Also another thing that is kinda wierd is that when my 6800GS is in I dont even have to plug the PCIE connector in it boots up fine without it. So I was like wierd, so I put in the 7900GS and it still powers on and fan spins at the same speed without the PCIE Power connected still no screen on boot so it never says plug in PCIE.

I ordered a new Am2 5400+ and New Asus Board so we will see what happens, but if anyone else has any suggestion I would greatly appreciate it.
 
It's the drivers.

Uninstall drivers, power down, remove 6800, install 7900gs, boot, install drivers, reboot
 
When you boot the computer do you see any thing like the maker of the pc or mobo (intro) so if you see it then its a driver problem inside windows. But if you dont see anything just blank screen then its not drivers definitly. Either card, mobo chipset incompatible, PSU or PCI slot damaged.
 
markintosh13 said:
It's the drivers.

Uninstall drivers, power down, remove 6800, install 7900gs, boot, install drivers, reboot
Click to expand...

no.


very very wrong.



try pulling everthing not needed for a bios boot from your computer. dc the hard drives, other pci cards, whatever. maybe something else is fighting with it.
 
The PNY is a good card, I had one awhile back. People are saying drivers but if its not posting then they cant be the issue. Youve tried just about eveything so Id think it has to be some strange compatability issue.

The 7900GS doesnt require alot of power. I had mine running with a Opty 170@2.8, 4 Sata HD, DVD Bruner, and numerous fans all powered by a 450w FSP. I never had an issue with that set-up.
 
Have you tried both DVI connectors on the 7900GS? For some reason, I've found that sometimes one seems to be the preferred primary, but they don't denote it as such. I had that happen with my last build. Couldn't get it to work as a single monitor on one output. Put it on the other output and it was fine. The second output did work fine for dual monitors.
 
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