The card above (locked wf3 1x 6 pin and 1x 8 pin connector) runs the 1100/1500 24/7. i just had it at 1110 cause i was inching it up 5mhz at a time to find the max (1125 @ stock 1.25v) im not raising the voltage just due to the lack of cooling explained above.
My other 7950 (unlocked gigabyte wf3, 2x 6pin connectors) runs with all the same cgminer settings, same driver version/sdk, same everything in cgminer, and gets 630kh/s at 1050/1750 at 19 intensity.

Go figure.