3 x 5850s at 1000 MHs/s 65 - 90'C poclbm -v -w 128 <0.3% stale
2 x 6870s at 600 MHs/s 60 - 72'C poclbm -v -w 128 <0.3% stale

With a couple of cooling fans for the 5850s, I could increase the Hash rate to 350-360 each.