UT2003 - Flyby:
1024x768	FPS	Ranking
MSI RX800XT-VTD256E	350.93
Gigabyte GV-RX80L256V	353.61
PowerColor X700 Pro	276.12
Albatron Trinity PC6600	204.87
Albatron Trinity PC6600U	269.28
MSI NX6600GT-TD128 AGP	295.72
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	306.8
Gigabyte GV-3D1 (SLI Mode 500/1120)	291.04
MSI NX6600GT-TD128E (Single)	305.6
MSI NX6600GT-TD128E (SLI Mode)	290.48
MSI NX6800GT-T2D256E	340.92
MSI NX6800GT-T2D256E (416/1162)	344.93
1600x1200	FPS	Ranking
MSI RX800XT-VTD256E	281.09
Gigabyte GV-RX80L256V	258.66
PowerColor X700 Pro	130.57
Albatron Trinity PC6600	100.92
Albatron Trinity PC6600U	140.94
MSI NX6600GT-TD128 AGP	122.99
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	183.57
Gigabyte GV-3D1 (SLI Mode 500/1120)	243.62
MSI NX6600GT-TD128E (Single)	177.38
MSI NX6600GT-TD128E (SLI Mode)	238.06
MSI NX6800GT-T2D256E	254.32
MSI NX6800GT-T2D256E (416/1162)	288.87
UT2003 - botmatch:
1024x768	FPS	Ranking
MSI RX800XT-VTD256E	111.2
Gigabyte GV-RX80L256V	109.69
PowerColor X700 Pro	110.98
Albatron Trinity PC6600	103.47
Albatron Trinity PC6600U	109.24
MSI NX6600GT-TD128 AGP	108.2
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	108.51
Gigabyte GV-3D1 (SLI Mode 500/1120)	103.7
MSI NX6600GT-TD128E (Single)	108.87
MSI NX6600GT-TD128E (SLI Mode)	103.51
MSI NX6800GT-T2D256E	113.54
MSI NX6800GT-T2D256E (416/1162)	113.48
1600x1200	FPS	Ranking
MSI RX800XT-VTD256E	110.75
Gigabyte GV-RX80L256V	106.14
PowerColor X700 Pro	87.99
Albatron Trinity PC6600	64.12
Albatron Trinity PC6600U	87.05
MSI NX6600GT-TD128 AGP	97.93
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	101.72
Gigabyte GV-3D1 (SLI Mode 500/1120)	103.41
MSI NX6600GT-TD128E (Single)	100.72
MSI NX6600GT-TD128E (SLI Mode)	102.83
MSI NX6800GT-T2D256E	112.48
MSI NX6800GT-T2D256E (416/1162)	112.96

The MSI NX6800GT-T2D256E lags behind the two ATi cards a bit in one of these tests, but clearly exceeds them on the others, especially when overclocked.