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
Gigabyte GV-NX78X256V-B	125.8
MSI NX6800GT-T2D256E	126.1
MSI NX6800-TD128E	124.8
MSI NX6800-TD128E (6800 SLI)	124.8
Gigabyte GV-3D1 (Single 500/1120)	113.3
Gigabyte GV-3D1 (SLI 500/1120)	108.8
MSI NX6600GT-TD128E (Single)	114.6
MSI NX6600GT-TD128E (SLI Mode)	109
Albatron Trinity PC6600	97.6
MSI NX6200TC-TD32E	51.5
Albatron GeForce 7800 GTX	125.7
Albatron GeForce 7800 GTX (479/1347)	125.8
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
Gigabyte GV-NX78X256V-B	124.3
MSI NX6800GT-T2D256E	110.6
MSI NX6800-TD128E	92.2
MSI NX6800-TD128E (6800 SLI)	121
Gigabyte GV-3D1 (Single 500/1120)	92.6
Gigabyte GV-3D1 (SLI 500/1120)	107.4
MSI NX6600GT-TD128E (Single)	90.8
MSI NX6600GT-TD128E (SLI Mode)	107.3
Albatron Trinity PC6600	55.7
MSI NX6200TC-TD32E	24.2
Albatron GeForce 7800 GTX	125.2
Albatron GeForce 7800 GTX (479/1347)	125.6
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
Gigabyte GV-NX78X256V-B	124.5
MSI NX6800GT-T2D256E	107.1
MSI NX6800-TD128E	87.8
MSI NX6800-TD128E (6800 SLI)	119.4
Gigabyte GV-3D1 (Single 500/1120)	90.1
Gigabyte GV-3D1 (SLI 500/1120)	106.8
MSI NX6600GT-TD128E (Single)	87.9
MSI NX6600GT-TD128E (SLI Mode)	106.4
Albatron Trinity PC6600	52.5
MSI NX6200TC-TD32E	23.2
Albatron GeForce 7800 GTX	123.9
Albatron GeForce 7800 GTX (479/1347)	125.7
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
Gigabyte GV-NX78X256V-B	96.7
MSI NX6800GT-T2D256E	66.9
MSI NX6800-TD128E	46.3
MSI NX6800-TD128E (6800 SLI)	70.6
Gigabyte GV-3D1 (Single 500/1120)	47.3
Gigabyte GV-3D1 (SLI 500/1120)	79.3
MSI NX6600GT-TD128E (Single)	45.9
MSI NX6600GT-TD128E (SLI Mode)	74.4
Albatron Trinity PC6600	26
MSI NX6200TC-TD32E	9.6
Albatron GeForce 7800 GTX	97.1
Albatron GeForce 7800 GTX (479/1347)	105.7

The lone Albatron GeForce 7800 GTX is a powerhouse in Doom 3 and only at 1600x1200 in High Quality do we see any benefit from SLI.