My x15 sgminer was forked on sgminer-dev already :
https://github.com/sgminer-dev/sgminer/tree/v5_0-x15
Check out the lasted optimized win32 binary :
https://mega.co.nz/#!5FMEjBhZ!fvRKSBXpCehZIg9wQKCnCVO84Ow6QLnCFZDdUHqBoAQ
There also a "bitblockold" kernel working with older GPUs (78xx, 68xx ...)
Expecting hash rate on 14.6 driver :
270X : 1.85MH/s (1100/1400 engine/mem)
7950 : 2.4MH/s (1050/1250 engine/mem) (mine was undervoltage / can't push engine clock too hard)
280X : 2.9MH/s (1100/1400 engine/mem)
there's 3 batch file for 7950, 270x and 280x and 3 binary kernel if you don't want to upgrade to 14.6, but hash rate would be 5% slower compared to 14.6 driver, just update your pool, worker, password and run aznboy84, do you have an officlal thread with all your X15 mining stuff in?
I'll add it to the OP...