Me :''I just boought an GA-880GMA-UD2h motherboard. Before it i had an Asrock Amd 780, and Asus 785. Any of the 2 boards could unlock a third core of the Cpu. On the Asrock manualy, on Asus auto. I have been using it triple-core for almost 2 years. I have tried the auto setting on Gigabyte and the sistem doesn't start. I have updated the Bios version to F5. Couldn't u build a version of bios with acc and manual core control like on older boards? I've seen ACC on older boards in M.I.T. menu. If you will not build such a bios i have no alternative than to return the board to the shop an get an Asus board instead.''
Gigabyte: ''
Thank you for supporting GIGABYTE products. About the issue you mentioned, there are several possibilities to effect the result of CPU unlock, for example, CPU quality and process, etc. Therefore,we are not able to guarantee the result. If currently your CPU cannot unlock, then we will suggest you to test with other CPU and see how it works. Sorry for the inconvenience.
Besides, the ACC function in the BIOS is [CPU Unlock].''
Me : '' I tried today with an Athlon 435 triple core . Both asus785 and asrock780 boards unlocked a 4th core stable and L3 cache(it has been used like this for over 1 yer), but GA-880GMA-UD2 refuses to start with [Cpu unlock] on. Both boards have more settings in acc, like Manual core control etc. What i cannot understand is why your newer and more expensive board has only 2 functions - Cpu unlock and Active core control. I have seen older gigabyte boards with a lot more functions.''
Gigabyte : Thank you again for your kindly mail. About the issue you mention, kindly note that unlock result depends on your CPU quality. Therefore, you can take your own risk to unlock; however, the result is not guarantee. If you cannot receive the unlock result, please test with other CPU. Sorry for the inconvenience.
Besides, since different motherboards have different chipsets, the BIOS option are not the same either.
So if you buy more newer more expensive boards you receive less than a cheap older one. I returned it to the shop and wenk for Asrock 890FX Deluxe5. Asrock should give lessons on unlocking. Unlocked both Phenom 550 into triple core and Athlon 435 into Phenom quad core.