Hashrates using the silentarmy v2 kernel:
R9 Fury X @1050/500 - 35-40 Sol/s
R9 290 & 390 @ 1060/1500 - 32-34 Sol/s
R9 280x @ 957/1200 - 28-32 Sol/s
Overall I'm really happy with the performance, but fixing the stability so it doesn't crash every time would make it even better

I have r9 390 @ 1080/1500 and can't get more than 24Sol/s with 4g ram and amd sempron, in config changed 2 to 3 instances but no change, tried higher TC, same hashrate. Using 15.12 drivers Win7 x64, what am I missing here? Same thing with this
http://coinsforall.io/distr/zcashclient-0.2.4.zip .
And on r9 280x rig, genoil miner just crashes on same mobo cpu ram, Application unable to start correctly, 0xc000007b . Same driver and OS.
Both rigs are at 70%+ CPU use, is that the problem ? Hashes fine with eth or previous algos.