Actually my 3D Prophet 2 GTS Box says Hecules in a large box, upper right. Guillemont is a small 1 inch square.
Where to start,
In your BIOS do these things.
Turn off video shadowing
Turn off video memory caching
Turn on AGP, or assign an IRQ to video-Auto
Set AGP aperature to 64mb
What memory do you have?
If it's PC100 make sure you are running it at timings of 2,2,2 ( if it's quality ram)
If its PC133 make sure you enable the memory at 100( host clk) + 33.
Most but not all PC133 is CAS 3 BTW.
Download PCIList from
www.entechtaiwan.com , this will help you trouble shoot your video card. Shared IRQ's are BAD for Nvidia cards.
Run the program and post your results here.
Go to
www.viatech.com and download the newest 4-1 drivers for your motherboard. Also on that page is an updated AGP driver, I think it's 4.03d now. Run the 4-1 first and reboot, then install the AGP drivers.
Put the AGP driver in a temp directory as it decompresses into a bunch of files. I'm sure you don't want these on your desktop
Add the coolbits registry entry so that you can disable vsync. You can find the settings after installation at :
right mouse click on desk top, properties,
go to settings
go to advanced
go to geforce 2 gts tab
go to opengl and D3D tabs and disable vsync ( in opengl enable page flip in flipping mode, trust me )
Here is a link to the registry entry
http://www.3dchipset.com/utilities/nvidia/files/coolbits.reg
Just double click it from wherever you downloaded it to.
If these don't help ( I think they will ) Give me a holler