Nothing now thanks to @#%$@%$ ATI's @#%@@%##@ POS drivers screwing up everything. Miner doesn't even work now when I try to rollback the driver version to the one I had that used to work. $#@@#$%$$%%&#ETW#^%Q@$#Q
Did you try cold-booting (Power completely off then back on)? My 5870 was locking up and bluescreening every hour for about a day. It turns out that a windows update had rebooted the computer. I now make sure that I cold boot every time I do a reboot.
My 5870 is getting 367mhash. I know it's low, but I don't feel like doing the fiddling to bring it up to 400mh/s.