Is my new 7800GT defectve?

[dadoribeiro]

I just installed a XFX 7800 GT bought brand new; it is replacing a 6200. Hardware installed without problems. Computer booted up with perfect image. Windows XP booted up and I installed nvidias 81.95, which went well. PC booted up again with no problems. I then went to display properties and change resolution to 1024x768 and refresh to 70hz; no problems here. To this point my PC was on for about 5 minutes. Every fan is running. I then proceed to check other settings and while I was LOOKING at the core temperature (which was 54) my screen went blank and the PC froze. I reseted and had to uninstall the drivers in safety mode but now the image is always corrupted, even outside XP (BIOS, DOS....).
I have a screen capture here:

http://dadoribeiro.sites.uol.com.br/imagem.jpg

I installed my old 6200 and everything is working. Any ideas? I tried unpluggin EVERY device from the PSU but the MOBO and nothing changed.

P4 LGA775 3.4 (no OC), 1 GB DDR2 (no OC), Seagate 120 SATA HD, Intel 915PBL Mobo with latest BIOS, 450 PSU

 

[Wentelteefje]

If that's the case, it seems like your graphics card may be broken... Although it's strange that it only happened after 5 min... Is the cooler seated well? Because 54°C idle is a lot...

BTW: Your image gives an error...

 

[dadoribeiro]

I corrected the image problem:

http://dadoribeiro.sites.uol.com.br/index.html

This link shows the screen capture.
My 6200 shows a core temp of 62 at idle. I think that 54 is around normal for a XFX 7800 GT.
Can this be related to PSU problems?

 

[Tu13erhead]

Uh, did you plug your 7800GT into your power supply?

 

[dadoribeiro]

Yes. Mine came with a 4 pin Molex instead of PCI Express Connector. Just for the fun of it I unplugged everything from the PSU (HD, DVD, floppy) but the supply to the MOBO and the 7800GT. Nothing changed. But one thing is curious: I left it in the box overnight but in the morning I decided to give it another try. Exactly same thing happend. First it was okay but then it got corrupted again. I would like to underclock it but I think that it might void the warranty.

 

[grimlykindo]

RMA

P.S. Don't buy XFX - unless they've greatly improved since the Geforce 6 series

 

[Wentelteefje]

Yep, that's some heavy checkerboarding... RMA will be your only way out of this unfortunately... Most certainly a heat problem IMO, but it's not worth buying an aftermarket cooler for, if you can RMA it...