I'm at 7kh/s on my main pc...4 r7 240 2gb's. They suck compared to yours Thirtybird :p
Ya, and I don't know why... What you were showing to me looked like not enough memory was being allocated, but your TC and LG were the same. I've got the 4 GB sapphire, but everything I was giving you was based on using only 1.6 GB of memory (single thread), and matched what Beave was doing on his 2GB cards with the same results - 2.5KH/sec.
I'm using windows 8 64bit...I'll try linux just for the heck of it.
I found 13.11 beta was slightly better but still bad, 1.75kh/s kinda sucks.
Maybe the cards are faulty? :/ I'm at a loss...