video card died

[marciocxs]

Hello from Brasil guys

I have one video card 7800 GTX EVGA and i decide
dissaembly the cooler to change thermal compound on die for better artic silver and clean all video card before decide sold

after all process and check all details thats all ok
i run for more of 4 hours all games like need most wanted, etc
and always checking temperatures are normal 50 celsius idle and 75 celsius full 3d (GPUz 0.3.0) the PC runs on 2d (internet, videos, music etc) for more 6 hours and are normal ...

after this
i decide a final test before turn off system and pack the vga to sold
i install and run GTA IV for tests and the PC shutdown on loading ...
i unplugedd the power cord and make a clear cmos

the PC turn on and on loading windows xp, shutdown ...

after this the PC dont turn any more if the video card 7800 are connected on the motherboard...
only the PSU fan move for 2 cm and stop ...
(one start resistor on the video card open??? like a ATX PSU?)

on stupid act me, i decide only plugged the PCI 6 pin AUX on 7800 and turn on PSU but witch a video card unplugged on motherboard and PUFFF
one mosfet are burning (immediately PSU shutdown)

SP8J5 4V Drive Pch+Pch MOS FET
= burning

i test my system witch on board video nforce 6100, PCie Geforce 8800 GT , PCie Radeon 3850 and are rock solid included on overclock mode

my system are Athlon X2 1900 MHz @ 2700 MHz
PSU are good Zalman Tech 360b-APS Active PFC
motherboard are abit NF-M2S (I Run 7800 GTX for 3 months on this system)

I am afraid to make EVGA RMA and notthing aproved and the make cost from shipping send to USA and back to Brasil

On this week i am upload more more pictures macro mode of this video card

[jpdoe]

Re: video card died

Most ATX PSU have short-circuit protection and overload protection.
That means that if the video card has an electrical short (cortocircuito), the atx power supply will detect it and shut down. That's the most likely reason why the fans stop almost inmediately.
The bad news is this protection isn't perfect. I've seen power supplies explode after succesfully shutting down a few times in a row, and being turn on again and again hoping the problem would magically go away.