Crossfire won't work

[Jacks_85]

hey guys this is really frusturating me!

so i have a amd phenom ii x4 955 on a asus m4a78t-e mother board. i am trying to get my radeon 4850 cards to crossfire and my second card won't detect in windows vista...

i know the two card work b/c i swap them with each other...but i am not sure if the second pci slot works?

can somebody give me some insight on this?

 

[Amg]

try to test your slots. stick one of your cards in and try it out if it don't boot or anything than after looking at the BIOS I would RMA the board


I dealt that board will have a jumper of any sort to get the second one working.

 

[jennyh]

Do you have your crossfire bridges connected? And if so, have you tried connecting both?

 

[Jacks_85]

I have one bridge and is on

How can I check in the bios

 

[jennyh]

You might need 2 bridges, that's what i'm trying to say.

 

[Jacks_85]

but i have looked on the web and it says i don't need two bridges...

and the problem is that vista don't even detect my second card on device manager...


is there a way to check if my second pci card in the bios detect my video card?

 

[Mousemonkey]

Have you tried GPU-z?

 

[Jacks_85]

no i have not...what does it do?

 

[Mousemonkey]

It's just an info tool, but it should tell whether your second card is being seen.

Link.

 

[Jacks_85]

ok that sounds good i'll look into it...

could it bee the power is not enough b/c i am using the two 4pin adapters on each card connecting to the PSU (crossfrie approve) and it has my fans attached to them...?

 

[Jacks_85]

ok problem resolved!

i had the wrong power plug on them...i am guessing it was not giving enough power