SharkyExtreme.com have posted a new guide to tweaking your Nvidia or ATI video cards. Here's a byte from their article:
One of the most widely overlooked areas of video card tweaking has nothing to do with the 3D card or the drivers, and is located deep within your motherboard's BIOS. These settings are universal, and will work with most major graphics chipsets regardless of make or model; that is, as long as they are AGP-based and have been made in the last few years.
Usually, the BIOS can be accessed by pressing the delete or F1 key during the boot process. If you've tried those two, and still can't get into your System BIOS, then check your motherboard user manual, or check the system while it boots. There will often be instructions right on the screen, as to which key to press. ATI & Nvidia Video Card Tweak Guide
One of the most widely overlooked areas of video card tweaking has nothing to do with the 3D card or the drivers, and is located deep within your motherboard's BIOS. These settings are universal, and will work with most major graphics chipsets regardless of make or model; that is, as long as they are AGP-based and have been made in the last few years.
Usually, the BIOS can be accessed by pressing the delete or F1 key during the boot process. If you've tried those two, and still can't get into your System BIOS, then check your motherboard user manual, or check the system while it boots. There will often be instructions right on the screen, as to which key to press. ATI & Nvidia Video Card Tweak Guide