I'm just wondering... for you folks getting low hashes for 280X, what is reported in GPU-Z for your engine and memclock?
300 Core - Occasional spikes to 500.
150 Memory - Occasional spikes to 1500.
All in all, really quite under-utilized.
This happens with multiple rigs, on Windows 7, 8, and 8.1. Single card & multi-card systems. I'm always getting ~340-370 per 280x.
Contents of .bat file:
setx GPU_MAX_ALLOC_PERCENT 85
:BEGIN
start "CryptoNote" /low /wait "c:\Miners\Claymore CryptoNote GPU Miner v3.1 Beta - POOL\NsGpuCNMiner.exe" -o POOL -p x -u ADDRESS -wd 1 -ee 1 -dbg -1
timeout /t 10
GOTO BEGIN
exit
I've also tried various settings of GPU_MAX_ALLOC_PERCENT, with a reboot in between each value change.