Before I go any further, let me just say. Yes, I know both motherboards I detail below are only 775 socket systems and a few years old, my reasons for purchasing the GTX 285 was just to bump up my graphics a bit.
First a little background of my systems
Abit AB9 Pro
4GB Memory (in two dimm slots)
Intel Q6700 CPU
Corsair HX 550w modular power supply.
2GB Memory (in two dimm slots)
Intel E6600 CPU
Hyper 500w power supply
Graphics card GTX 285 (purchased 2nd hand privately)
Note: Both machines have been and are running Nvidea 8800 GTS/GTX cards happily in their PCI-E x16 sockets.
To cut a long story short. If I fit the BFG GTX 285 card into either machine and power up the machine, after only 2 to 3 seconds the system freezes. No HDD activity. the machine's wont POST. No BIOS activity. No display on connected monitors nothing.
Green LED's show on the graphics card, the fan on the graphics card (and my CPU fan) is running and the HDD spins up but loads nothing (no HDD activity)
On the off chance it may be a power issue (despite me reading a good quality 500w would be enough) I also used a separate PSU to independently power the GTX285 so it had almost 350 watts all to itself if needed.
The seller tells me he feels both my mother boards are probably too old to support the GTX 285, and yet I cannot find any info on the Internet to say this may be the case, and a local computer shop also feels it should run fine.
The seller also says he had the same thing and purchased a brand new i7 style motherboard which he says it ran fine on three days ago for him.
I am trying to find anyone who can give me a reason why the GTX 285 will stop two different PC's from even booting up.
Can anyone offer any suggestions, as the natural reaction otherwise may be to suspect the GTX 285 of having a possible fault.
Thanks in advance for any advice, thoughts or reasons for this problem you may be able to give.