The longest I have been able to get my rig to run is 12 hours. I don't know what's causing it, but it's freezing up and I have to do a hard reboot which isn't convenient since I normally use team viewer. I posted my settings at
https://bitcointalk.org/index.php?topic=623409.msg7036775#msg7036775 if anyone can look at them and give me some suggestions. If the miner was just crashing I wouldn't care so much because that's easy to restart. It's just the hard reboots that are killing me.
lower your clocks. don't think you'll need 1500 mem anyways.
most of my cards run 1000/1200 @1.1v. Tweak the settings nicely, and they'll go as high as 2.5 mh/s
Thanks. I'll give it a shot. I was getting 2.2 mh/s on my 270 and 3.2 on my 280x. Hopefully I can get about the same with some stability.