Crossfire

bridge

HMMM. ok where can i get one.I figure the cards or the board would have it

look inside the card's box.

Follow up Question: If I have one 4850 from Sapphire, should I Xfire it with the identical card from Sapphire, or can I use another manufacturer's 4850?

Thanks in advance

You can use another manufacturer's 4850 just be aware that it has the same amount of memory and runs at the same speed of your first 4850... otherwise you have to slighlty overclock the 1st 4850  

Thanks.

I was kinda concerned that the BIOS/memory timings might be different between 2 different manufacturer's cards - what do you know about that?

No, it is the same on every stock 4850, just don't buy a factory overclocked one and there will be no problem  

Excellent. Thanks!

Where can I get one and do I need 2

Dude, you can get it at any computer store and no you can have only 1 card, 2 is not necessary.