Windows 8.1, 32GB Ram, 2x r9 290 and Im getting about 1200h combined rate in the Claymore console. Is that normal for r9 290s? Are there any switches or parameters I could pass when starting the program to increase hash rate?
If Elpida memory then yes it's okay hash
If Hynix then overclock to 1075/1500 and bump voltage very slightly (.025v)
You should get 750h+ per card.. So count on 1.5khash total
Also use 4.0 miner! Newer versions report higher hash in console but significantly lower "real" hash on pool.
On dwarfpool I see 15-20% difference!