In our last three AM3 motherboard reviews, we were able to manipulate our Phenom II X3 720 processor over 3.6GHz on air alone. We ran into some BIOS quirks while overclocking with the A785GM-M that I’d like to share with our readers. First of all, when you enable the CPU Frequency control to manually adjust the CPU core frequency and voltage, the BIOS automatically sets the Frequency to 8x, which is the lowest available multiplier setting. Users will also need to be aware that the Northbridge frequency is also set to 4x or 800 MHz, which is the lowest available setting in that option. The CPU voltage was also not set properly right out of the gate and was set to 1.55v after I enabled the CPU frequency’s manual settings.
Why is this important? Well, instead of the BIOS using the CPU and chipset’s stock configurations, it seems to set both of these components at their lowest settings, which makes any overclocker manually watch these figures right from the beginning. Usually, I don’t have to worry about any of these settings because they are usually configured by the specs of the hardware before they are tweaked by the user.
After double-checking that all the stock settings were correct, I started to bump up the core clock from its stock frequency of 2.4GHz to 2.8GHz. I left everything stock to see if it would boot and function properly. After some stability testing, we moved on to 3GHz and 3.2GHz, which also worked well. We hit our sweet spot on this AMD Phenom II X3 720 Black Edition processor at around 18.5x on the CPU multiplier and increased the CPU voltage to 1.4v, which gave us a respectable 3.692GHz overclock.
See our overclocking results below for more details:
|CPU Speed||CPU Multiplier||HyperTransport Clock||DRAM Frequency||DRAM Timings||CPU Voltage||Temp (Idle)||Temp (Load)|
|3.692GHz||18.5||200MHz||1075 MHz||7-7-7-18 1T||1.4v||24c||36c|