So... since the bios sets the clock speeds, if after flashing the bios you're getting WORSE than overclocking that means you're not flashing the proper settings.
28mh/s is pretty good, I'd suggest trying to flash the cards (individually) again and double check all of the settings
You got me wrong, so it's like this, I believe I had one system crash and that's when the change ocured.
Before:
-No biosmod and no OC - 25 mh
-No biosmod + OC > 27-28 mh
After the unknown change:
-No biosmod and no OC - 25 mh
-No biosmod + OC > 25 mh
-Biosmod + oc or non-oc > 25 mh
This happens on the SAME card. And on three different PC's with 3 different motherboards, holding 1 GPU each. mclock controller fail or what?
I'm having EXACTLY the same issues. Some of my cards will do 28Mh/s, some 25. No matter what I set, the miner ignores the values.
I have re-flashed, no change.
Highly frustrating.
I feel you bro