Diamond Viper V770 Ultra Review
16 vs 32-Bit Color Performance
While the previous pages provided benchmark results for 16-bit and 32-bit color individually, this page shows the V550 and Viper V770 Ultra going head-to-head.
These charts show the performance loss, in percent, when changing from 16-bit to 32-bit color.  The green bar represents the V550's loss in performance when moving from 16-bit to 32-bit color, while the yellow bar is for the Viper V770 Ultra (both running at default speeds).  The results indicate that at higher resolutions, the Viper V770 Ultra's loss in performance is much less drastic than the Viper V550.
Note the Quake 2 massive1 timedemo results for the Viper V770 Ultra at the 1152x864 resolution (first chart).  The loss of 29.1% (54.4 fps in 16-bit color versus 42.6 fps in 32-bit color) exceeds that of the 1600x1200 resolution (28.9%).  I re-ran the benchmark three additional times and came up with the same results.
Quake 2 Massive1 Timedemo
Quake 2 Crusher Timedemo
Kingpin Bigass Timedemo