Unreal Tournament 2003	Source: Epic

Unreal Tournament 2003 is the sequel to 1999's multiple 'Game of the Year' award winner. It uses the very latest Unreal Engine technology - where graphics, sound and game play are taken beyond the bleeding edge. Unreal Tournament 2003 employs the use of Vertex as well as Pixel Shaders and it's recommended that you use a DirectX 8 videocard to get the most out of the game.

UT2003:
Flyby - 640x480	FPS	Ranking
ECS RS400-A (RS400 200/400 Onboard Video)	87.42
MSI 661FM3-V (SiS 661FX 200/400 Onboard Video)	44.77
Albatron K8X890 Pro II (K8T890 200/400)	324.98
MSI RS480M2-IL (RS480 200/400 Onboard Video)	115.79
MSI RS480M2-IL (RS480 200/400 7800GTX)	307.08
ASRock 939Dual-SATA2 (Uli M1695 200/400)	331.79
Chaintech Zenith VNF4 Ultra (NF4 Ultra 200/400)	335.86
DFI LANParty NF4 SLI-DR (NF4 SLI 200/400)	331.68
ECS KN1 Extreme SLI (NF4 SLI 200/400)	333.07
Epox 9NPA+ SLI (NF4 SLI 200/400)	334.67
Foxconn WinFast 6150K8MA-8EKRS (GF6150 200/400 Onboard Video)	140.47
Foxconn WinFast 6150K8MA-8EKRS (GF6150 200/400 GeForce 7800GTX)	330.81
Botmatch - 640x480	FPS	Ranking
ECS RS400-A (RS400 200/400 Onboard Video)	34.91
MSI 661FM3-V (SiS 661FX 200/400 Onboard Video)	29.27
Albatron K8X890 Pro II (K8T890 200/400)	108.74
MSI RS480M2-IL (RS480 200/400 Onboard Video)	56.13
MSI RS480M2-IL (RS480 200/400 7800GTX)	102.24
ASRock 939Dual-SATA2 (Uli M1695 200/400)	109.81
Chaintech Zenith VNF4 Ultra (NF4 Ultra 200/400)	111.31
DFI LANParty NF4 SLI-DR (NF4 SLI 200/400)	110.13
ECS KN1 Extreme SLI (NF4 SLI 200/400)	110.13
Epox 9NPA+ SLI (NF4 SLI 200/400)	110.55
Foxconn WinFast 6150K8MA-8EKRS (GF6150 200/400 Onboard Video)	75.26
Foxconn WinFast 6150K8MA-8EKRS (GF6150 200/400 GeForce 7800GTX)	109.82

At low resolutions the 6150K8MA-8EKRS has no problems with UT2003 and it should be enough for casual gamers. The Intel rigs are quite a bit slower than the AMD systems.

Unreal Tournament 2004	Source: Epic

Unreal Tournament 2004 is the sequel to the highly popular UT2003 and uses the very latest Unreal Engine technology. Unreal Tournament 2004 employs the use of Vertex and Pixel Shaders and it's recommended that you use a DirectX 9 videocard if you plan to play competitively.

UT2004
dm-rankin	Points	Ranking
ECS RS400-A (RS400 200/400 Onboard Video)	32.88
MSI 661FM3-V (SiS 661FX 200/400 Onboard Video)	20.03
Albatron K8X890 Pro II (K8T890 200/400)	124.28
MSI RS480M2-IL (RS480 200/400 Onboard Video)	50.66
MSI RS480M2-IL (RS480 200/400 7800GTX)	104.71
ASRock 939Dual-SATA2 (Uli M1695 200/400)	112.82
Chaintech Zenith VNF4 Ultra (NF4 Ultra 200/400)	118.89
DFI LANParty NF4 SLI-DR (NF4 SLI 200/400)	126.81
ECS KN1 Extreme SLI (NF4 SLI 200/400)	116.97
Epox 9NPA+ SLI (NF4 SLI 200/400)	117.5
Foxconn WinFast 6150K8MA-8EKRS (GF6150 200/400 Onboard Video)	60.88
Foxconn WinFast 6150K8MA-8EKRS (GF6150 200/400 GeForce 7800GTX)	116.3
as-convoy	Points	Ranking
ECS RS400-A (RS400 200/400 Onboard Video)	21.32
MSI 661FM3-V (SiS 661FX 200/400 Onboard Video)	17.34
Albatron K8X890 Pro II (K8T890 200/400)	84.55
MSI RS480M2-IL (RS480 200/400 Onboard Video)	34.14
MSI RS480M2-IL (RS480 200/400 7800GTX)	67.68
ASRock 939Dual-SATA2 (Uli M1695 200/400)	72.82
Chaintech Zenith VNF4 Ultra (NF4 Ultra 200/400)	76.41
DFI LANParty NF4 SLI-DR (NF4 SLI 200/400)	85.77
ECS KN1 Extreme SLI (NF4 SLI 200/400)	75.52
Epox 9NPA+ SLI (NF4 SLI 200/400)	75.91
Foxconn WinFast 6150K8MA-8EKRS (GF6150 200/400 Onboard Video)	37.65
Foxconn WinFast 6150K8MA-8EKRS (GF6150 200/400 GeForce 7800GTX)	75.15
ctf-bridgeoffate	Points	Ranking
ECS RS400-A (RS400 200/400 Onboard Video)	44.19
MSI 661FM3-V (SiS 661FX 200/400 Onboard Video)	23.09
Albatron K8X890 Pro II (K8T890 200/400)	172.37
MSI RS480M2-IL (RS480 200/400 Onboard Video)	67.61
MSI RS480M2-IL (RS480 200/400 7800GTX)	142.59
ASRock 939Dual-SATA2 (Uli M1695 200/400)	155.77
Chaintech Zenith VNF4 Ultra (NF4 Ultra 200/400)	164.5
DFI LANParty NF4 SLI-DR (NF4 SLI 200/400)	176.01
ECS KN1 Extreme SLI (NF4 SLI 200/400)	161.68
Epox 9NPA+ SLI (NF4 SLI 200/400)	162.53
Foxconn WinFast 6150K8MA-8EKRS (GF6150 200/400 Onboard Video)	69.41
Foxconn WinFast 6150K8MA-8EKRS (GF6150 200/400 GeForce 7800GTX)	160.67

Numbers are might tighter here, the GeForce 6150 and Radeon Xpress 200 are neck and neck in terms of performance.