I bought a second ATi HD 3850 two days ago. My problem is when i activate Crossfire (both GC´s running) i get aunusual ammount of lag (fps go down to 4,5fps). When i turn off Crossfire all goes back to normal. The funny thing is that only SL behaves like that, all my other games ( Crysis, COD4, GuildWars, EVE-online: Trinity and some other games) run fine with Crossfire enabled. So anyone here who has a idea how i can fix that ? I think u can imagine that it gets annoying when you have to switch Crossire on and off all the time.
OC: Windows Vista Ultimate 64bit
CPU: AMD 64X2 6000+ (2x3Ghz)
RAM: 4GB Corsair XMS2 DDR2 800
GC´s: 2x ATi HD3850
Mainboard: ASUS M3A32-MVP Deluxe