The ASUS P5E3 Premium uses an American Megatrends Inc (AMI) BIOS. This BIOS contains all the features we have come to expect from a BIOS on a high-end ASUS motherboard. There are plenty of overclocking options and other tweak-able settings to satisfy enthusiasts. Some of the overclocking features include a 65-step DRAM voltage control, adjustable CPU voltage in 0.00625V increment, 49-step Chipset voltage control, 16-step FSB voltage control, 65-step CPU PLL voltage control, FSB adjustments from 200MHz to 800MHz, and memory tuning from 800MHz to 3200MHz. The CPU voltage goes up to 2.1V and the DRAM up to 2.7V. The hardware monitoring from the BIOS area includes the CPU temperature, CPU fan speed, CPU fan control, motherboard temperature, four chassis fan speeds, CPU voltage, +3.3V voltage, +5V voltage, and +12V voltage.