I just added a new 4890 ATI card to my existing one and everything installed fine. However when I start certain games I get the dreaded memory dump bluescreen. I have windows 7 and the newest ATI drivers. HELP????
PS:- installation went fine and the ATI catalyst even picked up the crossfire....
You shouldn't have to uninstall/reinstall if you add/take out a card, I had no problem installing a second HD5850, I already had a HD5850 and ATi 10.4 drivers installed, then simply installed the second card into my motherboard, connected the power and crossfire bridge, booted into windows, it asked me if I wanted to enable Crossfire, I click "yeah go on then".
I've also never uninstalled a driver before removing a graphics card... I've not had any problems with drivers because of it.
1) it only has 2 x 6 pin PCI-E connectors so that tells me its not really designed for multi GPU cards (espically power hungry cards like HD4890's)
2) its a Coolermaster, Not exactly known for there quality, I once had a Coolermaster Real Power M700 that really struggled to run a Core i7 920 system with a single HD5850.
The problem is unlikely to be CPU, motherboard or memory related ( I assume nothing is overclocked? ) Though its still a good idea to run memtest (I can't advice you how to do this as I've never done it myself, Just google it.)