Comanche 4	Source: Novalogic

The Comanche 4 benchmark demo is a unique benchmark 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 Benchmark Results
Motherboard	FPS	Ranking
Asus K8V Deluxe	63.87
Gigabyte K8NNXP	66.09
Gigabyte K8NSNXP	66.12
MSI K8N Neo-FIS2R (9800XT)	66.33
MSI K8N Neo-FIS2R (5950 Ultra)	67.12
MSI K8N Neo-FIS2R (9800XT, 223/446)	68.82

Here the MSI K8N Neo-FIS2R Platinum is the fastest again. I don't know what type of optimizations nVIDIA has done.... but the GeForceFX 5950 Ultra really is faster!

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), 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 Benchmark Results 640x480-32bit
Motherboard	FPS	Ranking
Asus K8V Deluxe	128.057
Gigabyte K8NNXP	126.241
Gigabyte K8NSNXP	130.691
MSI K8N Neo-FIS2R (9800XT)	132.068
MSI K8N Neo-FIS2R (5950 Ultra)	139.692
MSI K8N Neo-FIS2R (9800XT, 223/446)	145.692

We see the same thing here in X2, the stock system with the GeForceFX 5950 Ultra is faster than the Radeon 9800XT! Overclocking boosts performance of the K8N Neo-FIS2R Platinum nicely as expected.