Its been running quite well since I've had it (touch wood!)
I've been using the Hiper on an Oc'd Opty 146 to 2.8ghz, 4 sticks of DDR ram, AMD 4 heatpipe stock cooler, 2900gt OC'd to 823/1107, Audigy 2Zs, 3 HDDs, 1 optical drive, 3 case fans, OCZ memory cooler, Antec vcool fan.