Hello,
I'm about to purchase two ATI 4890 1GB Turbo Edition 900MHz cards but I'm a little concerned with the PSU I have at the moment is not enough to power both of these cards. Although the PSU is CrossFire Certified I hope it's anough. The PSU I have in my rig at the moment is a new Enermax Revolution 85+ with a Peak Power of 1020W and a UPS of 1000W/1400VA. The Rails are Combined 840W (70A)