Found this thread while replying this one.
Common platform:
Asus TXP4, BIOS 0109 (430TX chipset)
64MB SDRAM
CF adapter as HDD
MS-DOS 6.20 + Windows 3.10 or Windows 98 SE
Cards tested:
#1: ExpertColor CP775 (S3 Trio64V2/DX, 86C775), PCI, 2 MB
I don't have a nice photo at this moment but it looks just like this:
The attachment 775expertc.jpg is no longer available
LunarG had already tested its predecessor, the Trio64V+ (86C765).
#2: Gainword CARDEXpert SG4 Pro (S3 Savage4 Pro, 86C397), PCI, 16 MB
The attachment My_SG4_Pro.jpg is no longer available
Worked in DOS, Win31, Win98SE
The PCB was quite different from the AGP version but almost identical to Mirage 397L.
The attachment SG4_AGP.jpg is no longer available
The attachment Mirage_397L.jpg is no longer available
I couldn't remember the exact reason why I bought it; all I knew was that I needed a replacement for the Number Nine 9FX Motion 771 that came with my Dell Dimension (430FX chipset), and it took me a while to find an acceptable PCI card (AGP was already mainstream in year 2000).
Speed wise, Savage4 performed poorly with late 1990 3D games. And despite of being beautiful, not many games supported S3TC. Its best merit was compatibility, which serves retro gaming nowadays really well.