I ordered a Gigabyte 1000 mhz card, which apparently has the voltage locked, BUT... I read some people saying that you can flash the bios with the GB 1.1 Ghz model's bios and it unlocks the voltage, and people are getting 1250 mhz out of it. It was on sale for $70 off, and has good cooling, so it seemed like a smart choice to me. Correct me if I'm wrong, I still can potentially reverse the order.
Btw, to answer a previous question, I'm currently getting 808 mh/s per 6990 while mining. I also just sold 2 of them, and have 3 remaining. I'm planning on selling the other 3 and maybe getting as ASIC.
Edited by Delicieuxz - 2/28/13 at 10:52pm