Quake III Arena	Source: ID Software

Quake III Arena is a First Person Shooter (FPS) that revolutionized gaming as we know it. Using multiple light sources and having graphics textures that can fill videocards.

Quake III Arena MAX 1024x768 demo001
	Video Card	FPS	Ranking
1.	ATi Radeon 9800XT	378.8
2.	ATi Radeon 9800 Pro	370.7
3.	ATi Radeon 9700 Pro	347.9
4.	Asus Radeon A9600XT	265.2
5.	Gigabyte Radeon 9600 Pro	239.5
6.	MSI FX5900U-VTD256 Ultra	395.4
7.	Albatron GeForceFX 5600 Ultra	310.1
8.	MSI G4Ti4600-VT2D8X	294
9.	Crucial Radeon 9600 Pro	239.2
10.	Crucial Radeon 9600 Pro (506/315)	270.8

Quake III Arena MAX 1024x768 nv15demo
	Video Card	FPS	Ranking
1.	ATi Radeon 9800XT	87.1
2.	ATi Radeon 9800 Pro	88.2
3.	ATi Radeon 9700 Pro	87.7
4.	Asus Radeon A9600XT	87.1
5.	Gigabyte Radeon 9600 Pro	87.1
6.	MSI FX5900U-VTD256 Ultra	93.4
7.	Albatron GeForceFX 5600 Ultra	93.8
8.	MSI G4Ti4600-VT2D8X	94.1
9.	Crucial Radeon 9600 Pro	88.1
10.	Crucial Radeon 9600 Pro (506/315)	87.7

Quake III is getting old and all the cards are perfectly gamable at 1024x768.

Quake III Arena MAX 1600x1200 demo001
	Video Card	FPS	Ranking
1.	ATi Radeon 9800XT	218.4
2.	ATi Radeon 9800 Pro	202.3
3.	ATi Radeon 9700 Pro	175.7
4.	Asus Radeon A9600XT	117
5.	Gigabyte Radeon 9600 Pro	104.4
6.	MSI FX5900U-VTD256 Ultra	237.6
7.	Albatron GeForceFX 5600 Ultra	143.9
8.	MSI G4Ti4600-VT2D8X	137.5
9.	Crucial Radeon 9600 Pro	105
10.	Crucial Radeon 9600 Pro (506/315)	120.6

Quake III Arena MAX 1600x1200 nv15demo
	Video Card	FPS	Ranking
1.	ATi Radeon 9800XT	86.5
2.	ATi Radeon 9800 Pro	86.7
3.	ATi Radeon 9700 Pro	85.9
4.	Asus Radeon A9600XT	68.6
5.	Gigabyte Radeon 9600 Pro	65.7
6.	MSI FX5900U-VTD256 Ultra	92.6
7.	Albatron GeForceFX 5600 Ultra	79.1
8.	MSI G4Ti4600-VT2D8X	76.2
9.	Crucial Radeon 9600 Pro	66.3
10.	Crucial Radeon 9600 Pro (506/315)	70.7

At 1600x1200 all cards provide enough framerates but you'll be able to tell the difference between the mainstream and high end cards. I know I can.