black screen problem

[Bloodust]

I got my gfx card from RMA and it seems that it doesnt work on my mobo, but it works on my friends. We both use PCI-E graphic cards, but when I insert the asus 6600 gt to my mobo and boot, pc speaker beeps 1 long and 3 short which means the gfx card is not fully functional or something. Im waiting for my friend to drop by so I can try his old Ati 850xt, but what could be the reason my RMAd gfx card works on my friend but not on my mobo ?

 

[Bloodust]

I had the mobo sent to RMA and they said it was working properly so I suppose I should check out my PSU next.

 

[Bloodust]

HEC 300w
http://www.compucase.de/englisch/produkte/netzteile/silent/300lrptx.php <-- that

Friend forgot to bring it lol and now im clueless...

 

[Bloodust]

More news


and LL stands for ?

[17:08:47] <SlashLife> Low Level maybe?
[17:09:02] <SlashLife> As in "I know what value it really is, but it's just too damn low"?

Busted psu perhaps ?
oh yeah, the psu tester beeps and blinks the LL

 

[Bloodust]

Im talking to myself here BUT, just one more question
How is this possible:
My Asus 6600GT doesnt work on my pc but works on my friends pc and my friend's Asus 7900 GS TOP works on mine and his pc ?

*edit*
Tested another PSU too ...