Quote Originally Posted by rge View Post
F5b same problem as F4 and F5a on mine. Any bclk above 170, and I can no longer reboot, just get blank screen with computer running. Have to hit the reset key to get into windows. I wrote GB and asked if they would pass on to bios manufacturers about the high bclk bug that was introduced between F4m and F4, and persists in F5a that affected a lot of people (and now F5b). They wrote back saying that OCing is not guaranteed, but would pass the info along. If GB Extreme (and UD5) bios testers are not OCing these things and testing them that way, and they dont support Ocing, then maybe GB could change the name of the mobo to GB Stock instead of GB Extreme, so the public would know.

Itīs really going to annoy me, if that bug persists in all future bioses, and F4m is as far as it goes with OCing.
I said above that this problem can have other side. I had exactly the same problems as you when i upgraded from F4j to F4, but yesterday when I upgraded from F4m to F5a I had no problem in reaching the 211 bclk, and none of the serious stability problems that I had before (only worse performance now). Itīs very difficult for me to explain this in English, but I think it is something related to how the board adjusts its internal values, specially for memory, after a flashing or a re-setting. For example, working in the same Bios, I have found that is much more stable and safe set the voltage first and then go up the bclk than set the bclk first and then try to adjust the voltage (normal procedure).
At the bottom, I can only say that with this new procedure the board is fully Linpack stable @ 1.34v Qpi, while in the "old fashion" way is impossible to descend under 1.40v Qpi, and now when upgrading my bios i not have none serious problem.
I hope that at least some of what Im trying to say is understandable...