OK, so here's a little surprise: I picked one up I dropped it in the 3570K rig and set it to 4 WU's, and they are cranking out (at least for now) at about 5 minutes, which means 1.25 minutes each. I was hoping to drop the GTX 280 in the P4 rig I was going to build, but the P4 mobo seems like it's dead. Possibly. I feel like there is a little more room left on them. However, today I already pulled over 250K before that card was swapped out in the 3570K rig.