BIOS

BIOS

Adjusting bus speeds

CPU voltage adjustments

Adjusting chipset voltage

Although jumpers control the AD77’s main front side bus setting, the board’s BIOS offers a pretty expansive list of options for fine-tuning performance. Depending on the processor you’ve installed, the AD77 gives you the option to overclock the front side bus in 1MHz increments between 100 and 255MHz. There are also several voltage adjustments available, which may or may not help a stubborn processor or memory module achieve stability in an overclocked environment. The memory bus can be set at 2.5 or 2.63V, AGP voltage ranges from 1.5 to 1.8V inclusive, processor voltages between 1.1V and 2V are available in .025V steps, and finally, chipset voltages between 2.5 and 2.8V can be specified.

DIMM voltage adjustment

AGP voltage adjustment

AGP adjustment menu

Memory timings and frequencies play an important role in determining overall system performance. As we saw in our ASUS A7N8X nForce2 review, aggressively timed DDR333 memory can actually outperform DDR400. We’ve seen the same thing with VIA’s KT400 chipset. Even still, DFI has infused the AD77 Infinity with DDR400 support and a host of timing adjustments. CAS latencies, Bank Interleaving, and Command Rates are all customizable, among other memory settings.

Memory bus speeds available in BIOS

Adjusting memory timings

Integrated Peripherals men