Comanche 4	Source: Novalogic

The Comanche 4 benchmark demo is a unique test as it represents a real-world gaming experience. It contains the single player "Eagle's Talon" mission from the game as well as a detailed cinematic. This DirectX 8.1 benchmark demo will measure your system's performance in the standard frames per second format. The benchmark was run with audio disabled.

Comanche 4
640x480	FPS	Ranking
ASRock K8 Combo-Z/ASR (Ali M1689 200/400)	78.26
Soltek SL-K8TPro-939 (K8T800 Pro 200/400)	79.88
MSI K8T Neo2-FIR (K8T800 Pro 200/400)	79.6
MSI K8N Neo2 Platinum (NF3 Ultra 200/400)	78.96
Epox 9NDA3+ (NF3 Ultra 200/400)	79.51
Gigabyte GA-K8NXP-9 (NF4 Ultra 200/400)	80.54
MSI K8N Neo4 Platinum/SLI (NF4 SLI 200/400 X800XT)	81.83
MSI K8N Neo4 Platinum/SLI (NF4 SLI 200/400 6600GT SLI)	81.24
Gigabyte GA-K8NXP-SLI (NF4 SLI 200/400 X800XT)	79.87
Gigabyte GA-K8NXP-SLI (NF4 SLI 200/400 6600GT SLI)	78.77

All systems performed roughly the same in Comanche 4 so it's hard to declare a winner.

X2: The Threat	Source: Egosoft

A completely rewritten 3D engine based on DirectX8 encompasses many visual effects such as volumetric Nebulae (gas clouds) that have a real impact in the game (you can hide in them) and many new engine, shield, weapon and explosion effects. Objects cast real dynamic 3D shadows! Dynamic DP3 bump mapping allows a previously unseen level of detail.

X2 The Threat
640x480	FPS	Ranking
ASRock K8 Combo-Z/ASR (Ali M1689 200/400)	189.189
Soltek SL-K8TPro-939 (K8T800 Pro 200/400)	192.078
MSI K8T Neo2-FIR (K8T800 Pro 200/400)	192.69
MSI K8N Neo2 Platinum (NF3 Ultra 200/400)	203.556
Epox 9NDA3+ (NF3 Ultra 200/400)	198.56
Gigabyte GA-K8NXP-9 (NF4 Ultra 200/400)	197.482
MSI K8N Neo4 Platinum/SLI (NF4 SLI 200/400 X800XT)	211.237
MSI K8N Neo4 Platinum/SLI (NF4 SLI 200/400 6600GT SLI)	194.682
Gigabyte GA-K8NXP-SLI (NF4 SLI 200/400 X800XT)	198.145
Gigabyte GA-K8NXP-SLI (NF4 SLI 200/400 6600GT SLI)	188.146

The results from X2: The Threat are also all over the place, with the Gigabyte GA-K8NXP-SLI right in the middle of things.

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
ASRock K8 Combo-Z/ASR (Ali M1689 200/400)	342.59
Soltek SL-K8TPro-939 (K8T800 Pro 200/400)	353.64
MSI K8T Neo2-FIR (K8T800 Pro 200/400)	352.42
MSI K8N Neo2 Platinum (NF3 Ultra 200/400)	343.52
Epox 9NDA3+ (NF3 Ultra 200/400)	346.19
Gigabyte GA-K8NXP-9 (NF4 Ultra 200/400)	357.077
MSI K8N Neo4 Platinum/SLI (NF4 SLI 200/400 X800XT)	364.11
MSI K8N Neo4 Platinum/SLI (NF4 SLI 200/400 6600GT SLI)	301.41
Gigabyte GA-K8NXP-SLI (NF4 SLI 200/400 X800XT)	349.53
Gigabyte GA-K8NXP-SLI (NF4 SLI 200/400 6600GT SLI)	288.54
UT2003 - Botmatch
640x480	FPS	Ranking
ASRock K8 Combo-Z/ASR (Ali M1689 200/400)	107.93
Soltek SL-K8TPro-939 (K8T800 Pro 200/400)	111.36
MSI K8T Neo2-FIR (K8T800 Pro 200/400)	111.71
MSI K8N Neo2 Platinum (NF3 Ultra 200/400)	108.12
Epox 9NDA3+ (NF3 Ultra 200/400)	109.58
Gigabyte GA-K8NXP-9 (NF4 Ultra 200/400)	112.15
MSI K8N Neo4 Platinum/SLI (NF4 SLI 200/400 X800XT)	115.15
MSI K8N Neo4 Platinum/SLI (NF4 SLI 200/400 6600GT SLI)	107.01
Gigabyte GA-K8NXP-SLI (NF4 SLI 200/400 X800XT)	109.88
Gigabyte GA-K8NXP-SLI (NF4 SLI 200/400 6600GT SLI)	102.31

The Gigabyte SLI motherboard is one of the slower motherboards in UT2003, although the framerates are so close that I doubt even the most hardcore gamer would notice.