Quote Originally Posted by Seanie's Show View Post
I dont quite understand this, but are you saying you can only run crossfire with the CPU etc running at stock speeds, and if you overclock then crossfire is disabled ?

Can someone else who has 2 cards available please confirm this, as I was just about to buy another HD4850 and put it in crossfire, but if it mean ive got to run stock settings then im not bothering, i'll just grab 1 better card.
Well don't get the whole thing wrong now which makes you don't wanna buy a second 4850, i'll explain the situation.

So! I got a sapphire 3870("first" batch/generation card that came out here in Sweden) and at last i got a Powercolor 3870. One of the first sapphire's died even though neat temperatures but that's about it, both cards worked great on my x38 T2R until i got the x48, even that's a long story why i changed so i'll skip it (DEAD anyways)

well here's the thing. At stockspeed 3.33 the crossfire works perfect and 3dmark points in the right direction and stuff but in like 3.5 or somewhere around 333<>350 something happens and my primary samsung 24" goes black and as some freakin backup and the cards switches output, DVI @ card 1 (sapphire) goes DVI @ card 2 (powercolor) so i plug in the screen at the second card and heads into xp, vista and the crossfire is completely disabled. This problem drives me nuts but i'm having this feeling that the sapphire is kind 'a incompatible somehow.

I'd got'a say it feels good to even pass by someone who pays attention to this. Never ever beforce encountered these ******* probs.