AGP connection
Windows Vista does not directly affect a computer's Accelerated Graphics Port speed. You can adjust AGP speed on a computer running Windows XP, Vista or 7 through the computer's Basic Input/Output System settings.
Transfer Speed
You can adjust the transfer speed under the Advanced Chipset Features settings in BIOS. The speed is measured by two times and four times bandwidth protocols. This setting adjusts the speed that data enters the AGP video card. The greater the number, the faster the transfer.
Clock Speed
You can fine-tune the AGP speed on some motherboards through a setting called AGP Frequency found in the Advanced Chipset Features in BIOS. This setting is often used to speed up the AGP speed when the default settings are not as fast as those the AGP card can support.
Considerations
Different motherboard manufacturers don't always allow you to adjust the same things. You can almost always adjust the transfer speed for AGP, but fewer motherboards let you adjust the clock frequency
Accessing BIOS
You can access your computer's BIOS through the splash screen when you first turn on the computer. The screen might says something like "press (key name) for setup." That key will activate the BIOS settings
Tags: adjust transfer, adjust transfer speed, Advanced Chipset, Advanced Chipset Features, Chipset Features, This setting