Reminder, these are the chip classes to compile opencl for:

Hawaii = 290, 290x and 295x2 (works)
Tahiti = 7950, 7970, 7990, 280 and 280x (may work with the hawaii binary)

Other smaller cards may not work at all or be very slow with the hawaii binary.
If one card of a group works, so should the others of the same group; es. if it works on 280x, it should work on 7950 as well.