Hey everyone, first time posting.  Devs, thanks for your work so far; let's keep it going.  I think EXE has real potential, and I really like that the community is so helpful and not taking things too fast.

Thought I'd share some settings for R9 270 and 270X. Tested in Arch Linux and Win 7:

This gets ~208 KH/s on HIS 270s at ~80C (would be cooler but my fan setup is crap atm): -I 18 -g 1 --lookup-gap 2 --thread-concurrency 12801 --gpu-engine 1000 --gpu-memclock 1450

If you're mining P2P, you'll also need --expiry 1 --scan-time 1 --queue 0.  In western Canada, this gives me ~3.5% rejects on freebtc.eu:9173.

Although I haven't tried them with EXE/nscrypt, in cgminer my HIS 270X turbos get ~485 Kh/s with I 20 gpu 1135 mem 1500 TC 15232 (i.e. almost no OC).  The newest AMD drivers dropped the hashrate by ~40 KH/s per card, and I haven't been able to get the same results in sgminer either.  Probably just haven't found the right settings for the new drivers/sgminer yet.

Would love to hear if anyone can suggest any improvements.  Also, count me as another vote for KGW ASAP.  Cheers.