Today I got a parcel with a bunch of VLB graphics cards, so I have been switching out the ISA video in my 486 build and benchmarking two VLB cards. Submitted the scores to Phil's Ultimate VGA Benchmark Database, too.
ISA CL-GD5424:
3DBENCH2: 36.9 fps
PCPBENCH: 12 fps
Doom: 18.15 fps
Quake: 7.7 fps
VLB S3 805:
3DBENCH2: 66.8 fps
PCPBENCH: 14.7 fps
Doom: 34.29 fps
Quake: 8.7 fps
VLB CL-GD5430:
3DBENCH2: 53.7 fps
PCPBENCH: 14.8 fps
Doom: 28.40 fps
Quake: 8.8 fps
I initially wanted to use the GD5430 since it's got multi I/O on board as well as video (convenient!) but it's apparently significantly slower than the S3, and it's missing the back mounting bracket too, so it looks like I'll be using the S3 for now.
Am I right to assume that PCPBENCH and Quake are CPU bottlenecked (by an iDX4/100 WT with slowish RAM) since the S3 doesn't manage a better score than the Cirrus there, while being significantly faster at 3DBENCH2 and Doom?