Common Options : 00 to FF (Hex numbers)

Details

This option is slaved to the AGP Driving Control BIOS feature. If you set the AGP Driving Control to Auto, then the value you set here won't have any effect. In order for this BIOS option to work, you need to set the AGP Driving Control to Manual.

The AGP Driving Value determines the signal strength of the AGP bus. The higher the value, the stronger the signal. The range of Hex values (00 to FF) translates into 0 to 255 in decimal values.

On the reference motherboard, the default AGP Drive Strength was set as C5 (197). The default value will vary from motherboard to motherboard. But if you are using an AGP card based on the NVIDIA GeForce2 line of GPUs, then it's recommended that you set the AGP Driving Value to a higher value of EA (234). For other graphics cards, check with the manufacturer for the recommended AGP Driving Value.

Due to the nature of this BIOS option, it's possible to use it as an aid in overclocking the AGP bus. The AGP bus is sensitive to overclocking, especially in AGP4X mode and with sidebanding enabled. As such, a higher AGP Driving Value may be just what you need to overclock the AGP bus higher than normally possible. By raising the signal strength of the AGP bus, you can improve its stability at overclocked speeds.

But be very, very circumspect when you increase the AGP Drive Strength on an overclocked AGP bus as your AGP card may be irreversibly damaged in the process!

BTW, contrary to some reports, increasing the AGP Driving Value won't improve the performance of the AGP bus. It is not a performance enhancing option so you shouldn't increase the value unless you need to.