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, with the third run being recorded.

Doom3
LQ 640x480	FPS	Ranking
Asus AX800XT	75.4
MSI RX800XT-VTD256E	86.8
Gigabyte GV-RX70P256V	77.8
Asus V9999 Gamer Edition	71.5
Gigabyte GV-NX66T128D	80.8
Albatron Trinity GeForce 6600GT AGP	77.5
MSI NX6600GT-VTD128	77.6
Albatron GeForce PC6600	82.7
Albatron Trinity PCX 5900	60.4
Albatron Trinity PC6600U	73.2
Albatron Trinity PC6600U (514/743)	75.6
LQ 1024x768	FPS	Ranking
Asus AX800XT	74.7
MSI RX800XT-VTD256E	83.8
Gigabyte GV-RX70P256V	56
Asus V9999 Gamer Edition	71.7
Gigabyte GV-NX66T128D	76.3
Albatron Trinity GeForce 6600GT AGP	73
MSI NX6600GT-VTD128	72.6
Albatron GeForce PC6600	54.3
Albatron Trinity PCX 5900	37.4
Albatron Trinity PC6600U	69.1
Albatron Trinity PC6600U (514/743)	71.3
HQ 1024x768	FPS	Ranking
Asus AX800XT	72.8
MSI RX800XT-VTD256E	79.9
Gigabyte GV-RX70P256V	53.8
Asus V9999 Gamer Edition	70.2
Gigabyte GV-NX66T128D	75.3
Albatron Trinity GeForce 6600GT AGP	71.8
MSI NX6600GT-VTD128	71.3
Albatron GeForce PC6600	50
Albatron Trinity PCX 5900	30.7
Albatron Trinity PC6600U	67
Albatron Trinity PC6600U (514/743)	70.5
HQ 1600x1200	FPS	Ranking
Asus AX800XT	50.4
MSI RX800XT-VTD256E	43.5
Gigabyte GV-RX70P256V	25
Asus V9999 Gamer Edition	50.7
Gigabyte GV-NX66T128D	45.8
Albatron Trinity GeForce 6600GT AGP	40.5
MSI NX6600GT-VTD128	43.6
Albatron GeForce PC6600	24.7
Albatron Trinity PCX 5900	16.4
Albatron Trinity PC6600U	35.9
Albatron Trinity PC6600U (514/743)	38.4

Doom 3 is still playable at 1600x1200 at HQ! That's what I call a midrange card...