Far Cry 1.3
The Crytek engine is just one of many, but Far Cry is a good game to tax the graphics card with textures, shading and lighting. We turned on the flashlight in our custom time demo, Cooler01, to make sure the cards got a thorough workout. Far Cry also has HDR (High Dynamic Range) which helps test the effects of HDR code in testing.
Here it is clear to see that the eight pixel shader limitation in the GT core is hindering it severely; it just cannot keep up.