Gigabyte GA-990XA-UD3 -problem with unlocking cores on Phenom X2 545 CPU

[mstaglicic]

Hello!

I bought this motherboard (Gigabyte GA-990XA-UD3 rev. 1.0) before 15 days and I have a problem.
Before this motherboard,I had Gigabyte GA-MA785GM-US2H rev. 1.0 with AMD Phenom II X2 545 CPU processor.
On that motherboard I can unlock 2 hidden cores without any problem -just enabled ACC and save BIOS settings.
On new motherboard (Gigabyte GA-990XA-UD3 rev. 1.0) I cant unlock AMD Phenom II X2 545,not even one core (to be triple-core).
I have update BIOS to F8 version and still cant unlock.
I enable ACC and save BIOS settings,and PC got freezed after 1-2 minutes in Windows.

Could you answer me why I got this problem?

Thanks for answering.

[Dark Mantis]

Hi

It's possible that because this motherboard is designed for the Bulldozer chips really even though it is backwards compatible that it has more emphasis put on other areas.

[mstaglicic]

I put CPU on 1.50 v but it crashed after an  15 minutes in Windows.
On motherboard Gigabyte MA785GM-US2H i could normally unlock and OC CPU .