On a Covington (266 MHz Pentium II Celeron, no L2 cache) and an onboard 2 MB S3 Trio64V2/DX w/ video BIOS version 2.04.07, I get about 896 for 320x240 32bpp and about 804 for 320x240 16bpp. Higher resolutions make it notably slower for some reason (about half the speed for 640x480?). VGA fallback is about 993 for 320x200 8bpp.