Doom 3	Source: id Software

Doom 3 is the most advanced OpenGL game to date. It takes advantage of the latest videocard technology and pushes the processing power of the CPU to its absolute limits. At its highest setting, Ultra quality, texture sizes pass the 500MB mark which means even tomorrow's videocards will have a hard time running everything. The frame rates in the game itself are locked at 60 fps so anything above that point is wasted. Each test is run three times and with the third run being recorded.

Doom3
LQ 640x480	FPS	Ranking
MSI RX800XT-VTD256E	113.8
Gigabyte GV-RX80L256V	128.1
PowerColor X700 Pro	103.1
PowerColor Bravo X700	90.6
Albatron Trinity PC6600	97.6
Asus Extreme N6600TOP/TD/128M/A	114.3
Albatron Trinity PC6600U	111.4
MSI NX6600GT-TD128 AGP	112.5
MSI NX6600GT-VTD128SP	116.2
Albatron Trinity GeForce 6600GT AGP	112.2
Gigabyte GV-NX66T128D	114.6
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	113.3
Gigabyte GV-3D1 (SLI Mode 500/1120)	108.8
MSI NX6600GT-TD128E (Single)	114.6
MSI NX6600GT-TD128E (SLI Mode)	109
LQ 1024x768	FPS	Ranking
MSI RX800XT-VTD256E	105.4
Gigabyte GV-RX80L256V	100.8
PowerColor X700 Pro	57.2
PowerColor Bravo X700	44.1
Albatron Trinity PC6600	55.7
Asus Extreme N6600TOP/TD/128M/A	78.9
Albatron Trinity PC6600U	74.9
MSI NX6600GT-TD128 AGP	87.4
MSI NX6600GT-VTD128SP	89.8
Albatron Trinity GeForce 6600GT AGP	89
Gigabyte GV-NX66T128D	90.8
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	92.6
Gigabyte GV-3D1 (SLI Mode 500/1120)	107.4
MSI NX6600GT-TD128E (Single)	90.8
MSI NX6600GT-TD128E (SLI Mode)	107.3
HQ 1024x768	FPS	Ranking
MSI RX800XT-VTD256E	102.8
Gigabyte GV-RX80L256V	97.8
PowerColor X700 Pro	54.3
PowerColor Bravo X700	41.8
Albatron Trinity PC6600	52.5
Asus Extreme N6600TOP/TD/128M/A	75.7
Albatron Trinity PC6600U	71.3
MSI NX6600GT-TD128 AGP	84.3
MSI NX6600GT-VTD128SP	86.8
Albatron Trinity GeForce 6600GT AGP	85.9
Gigabyte GV-NX66T128D	88
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	90.1
Gigabyte GV-3D1 (SLI Mode 500/1120)	106.8
MSI NX6600GT-TD128E (Single)	87.9
MSI NX6600GT-TD128E (SLI Mode)	106.4
HQ1600x1200	FPS	Ranking
MSI RX800XT-VTD256E	58.4
Gigabyte GV-RX80L256V	50.1
PowerColor X700 Pro	24.7
PowerColor Bravo X700	18.8
Albatron Trinity PC6600	26
Asus Extreme N6600TOP/TD/128M/A	37.9
Albatron Trinity PC6600U	35.9
MSI NX6600GT-TD128 AGP	43.7
MSI NX6600GT-VTD128SP	44.5
Albatron Trinity GeForce 6600GT AGP	44.8
Gigabyte GV-NX66T128D	45.9
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	47.3
Gigabyte GV-3D1 (SLI Mode 500/1120)	79.3
MSI NX6600GT-TD128E (Single)	45.9
MSI NX6600GT-TD128E (SLI Mode)	74.4

Wow. I think this result makes the potential advantages of SLI clear...! A a pair of sub-$200US videocards substantially outperforming the mighty X800XT card. The ordinary single 6600GT cards also do well in this benchmark, burying the X700 Pro. Even the plain Albatron Trinity 6600 manages to best the ATI card at HQ1600x1200. The plain Radeon X700 card is clearly outclassed.