Neoseeker has published a review of Nvidia's 7800GT card.
Considering the $200 (it will be $150 for manufacturers who follow NVIDIA's MSRP) USD difference in MSRPs between the XFX GeForce 7800 GT and 7800 GTX, I'm extremely pleased with the level of performance that the 7800 GT is capable of delivering. I was expecting the decrease in the number of pixel and vertex shader pipelines, as well as clock speeds, to have a larger impact on performance, but that simply wasn't the case. While these differences were measurable by scientific means in nearly all of our tests, they will simply not be great enough for most gamers, to notice. What is 5 to 8 FPS in a game when you're already pushing 80+? Negligible.7800GT Review
