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 RX850XT-TD256E	116.2
MSI RX800XT-VTD256E	113.8
ATi Radeon X800 XL	124.3
PowerColor X700 Pro	103.1
PowerColor Bravo X700	90.6
GeForce 7800 GTX (SLI)	124.1
MSI NX7800GTX-VT2D256E (SLI Mode)	122.1
Albatron GeForce 7800 GTX	125.7
Gigabyte GV-NX78X256V-B	125.8
MSI NX7800GTX-VT2D256E (Single)	124.1
MSI NX6800GT-T2D256E	126.1
MSI NX6800-TD128E	124.8
MSI NX6800-TD128E (6800 SLI)	124.8
MSI NX6600GT-TD128E (Single)	114.6
MSI NX6600GT-TD128E (SLI Mode)	109
Albatron Trinity PC6600	97.6
MSI NX6200TC-TD32E	51.5
Asus EN6600GT/Silencer/HTD/256M/A	123.6
Asus EN6600GT/Silencer/HTD/256M/A (566/1149)	123.4
LQ 1024x768	FPS	Ranking
MSI RX850XT-TD256E	108.4
MSI RX800XT-VTD256E	105.4
ATi Radeon X800 XL	99.9
PowerColor X700 Pro	57.2
PowerColor Bravo X700	44.1
GeForce 7800 GTX (SLI)	124
MSI NX7800GTX-VT2D256E (SLI Mode)	121.9
Albatron GeForce 7800 GTX	125.2
Gigabyte GV-NX78X256V-B	124.3
MSI NX7800GTX-VT2D256E (Single)	122.7
MSI NX6800GT-T2D256E	110.6
MSI NX6800-TD128E	92.2
MSI NX6800-TD128E (6800 SLI)	121
MSI NX6600GT-TD128E (Single)	90.8
MSI NX6600GT-TD128E (SLI Mode)	107.3
Albatron Trinity PC6600	55.7
MSI NX6200TC-TD32E	24.2
Asus EN6600GT/Silencer/HTD/256M/A	96.7
Asus EN6600GT/Silencer/HTD/256M/A (566/1149)	101.6
HQ 1024x768	FPS	Ranking
MSI RX850XT-TD256E	106.2
MSI RX800XT-VTD256E	102.8
ATi Radeon X800 XL	97
PowerColor X700 Pro	54.3
PowerColor Bravo X700	41.8
GeForce 7800 GTX (SLI)	124
MSI NX7800GTX-VT2D256E (SLI Mode)	121.9
Albatron GeForce 7800 GTX	123.9
Gigabyte GV-NX78X256V-B	124.5
MSI NX7800GTX-VT2D256E (Single)	123.5
MSI NX6800GT-T2D256E	107.1
MSI NX6800-TD128E	87.8
MSI NX6800-TD128E (6800 SLI)	119.4
MSI NX6600GT-TD128E (Single)	87.9
MSI NX6600GT-TD128E (SLI Mode)	106.4
Albatron Trinity PC6600	52.5
MSI NX6200TC-TD32E	23.2
Asus EN6600GT/Silencer/HTD/256M/A	94.1
Asus EN6600GT/Silencer/HTD/256M/A (566/1149)	101.6
HQ1600x1200	FPS	Ranking
MSI RX850XT-TD256E	60.5
MSI RX800XT-VTD256E	58.4
ATi Radeon X800 XL	50.1
PowerColor X700 Pro	24.7
PowerColor Bravo X700	18.8
GeForce 7800 GTX (SLI)	120.8
MSI NX7800GTX-VT2D256E (SLI Mode)	117.6
Albatron GeForce 7800 GTX	97.1
Gigabyte GV-NX78X256V-B	96.7
MSI NX7800GTX-VT2D256E (Single)	97.6
MSI NX6800GT-T2D256E	66.9
MSI NX6800-TD128E	46.3
MSI NX6800-TD128E (6800 SLI)	70.6
MSI NX6600GT-TD128E (Single)	45.9
MSI NX6600GT-TD128E (SLI Mode)	74.4
Albatron Trinity PC6600	26
MSI NX6200TC-TD32E	9.6
Asus EN6600GT/Silencer/HTD/256M/A	48.9
Asus EN6600GT/Silencer/HTD/256M/A (566/1149)	54.3

At stock speeds the Asus GeForce 6600GT performs very well and overclocking does boost performance slightly.