Asus seems to prefer to use AMI BIOS over the more user friendly Award BIOS. There must be a reason why they stick with American Megatrends, but I personally find the Award BIOS much easier to navigate.
All the options that you need are supplied in the K8N-E BIOS. The VCore goes up to 1.75v while VAGP goes up to 1.7v. The weak side of the voltages options is in the VDIMM. The memory voltage only allowed up to 2.7v. This is quite low considering 2.8v is the norm nowadays, But with the use of TCCD memory, high voltages are usually not required.
It's with the Winbond chips that you'll need over 3v. All the memory latencies are included and can be adjusted manually. The command rate can be set to either at 1T or at AUTO, which usually means that it'll run at 2T. The HTT frequency ranges from 200-300MHZ in 1MHZ increments. There is also the ability to change the AGP frequency from 66MHZ to 75MHZ. This means that the AGP/PCI bus can be locked, but after reading around the web, the bus is only locked when the AGP is set to 67MHZ.

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