How did you manage to score four days of work on the HD7770s? My main issue is that I blew the breaker on Sunday; that caused all of my rigs to turn off. A couple of them had errors resulting from the sudden power failure, so WCG wouldn't send them their usual quota of WUs (even when I got them back up on another circuit). But I don't think that explains everything--part of it was that I had a bunch going on and forgot to increase the buffers on some of the systems. I'm really not sure about the Xeon though---it's been running fine, but it would never get the 3 days of WUs it should have gotten (more like 12 hours). I'm going to fight with things once the project comes back.