The motherboard prevents the CPU from reaching a prior overclock setting.
The motherboard prevents the CPU from reaching a prior overclock setting.
I received an older PC with an AMD Athlon 64 X2 4000+ 2.1GHz. The motherboard is GA-MA78GM-S2H (rev. 1.1). The CPU ratio stays at most 10.5, and the base clock could originally be set to 265MHz with a clock ratio of 10.5. The voltage was initially around 1.375. When trying to overclock to 270 MHz, the system warns it's in safe mode and won't let me adjust the frequency. It only allows changing the base clock to 265 with auto-voltage. However, inside Windows I see a WHEA_UNEXPECTED_ERROR, which I've dealt with before by increasing the voltage. But I can't change the voltage at 265MHz because of that warning. How can I get back to the previous overclock at 265MHz?