1.5V AGP cards have increasingly become a requirement of new motherboards/chipsets. If a motherboard requires a 1.5V AGP card and you place a AGP card in it that is not 1.5V, you will physically damage the motherboard and probably the video card as well. The following chipsets are known to require 1.5V AGP.
Intel
i845-all versions/variants
i850-all versions/variants
i850E-all
sis-all for P4
AMD
All Force chipsets including 220D,220,420,420D,415,415D
As a rule of thumb it is best to use a 1.5V AGP card with a new motherboard if there is any doubt.(Especially true for Intel based systems P4 and above.)
The good news is that almost all 4x AGP cards support 1.5V. For convenience here is a rough list of graphic card types that are almost always compatible.
Geforce2, Geforce2 MX, Geforce2 MX200/MX400
Geforce2 ultra/Pro/GTS/Ti
Geforce3/Ti200/Ti500
Geforce4-ALL
ATI Radeon DDR
ATI Radeon 7000/7200/7500/8500/8500LE/9000/9500/9700
ATI ALL-IN-WONDER Radeon/ALL
From
http://invisionfree.com/forums/Bloke...?showtopic=158
Sorry I couldnt help better with your MB problem.
Vern