BonaFideReviews posted a review on Gigabyte's GeForce 7800GT.

The GT model is quite similar to the 7 series flagship model, known as the 7800GTX, having 1 less vertex shader and 4 less pixel pipelines. The GT also has slower stock clock speeds of 400MHz core and 500MHz memory as compared to the GTX's 430MHz core and 600MHz memory. Seemingly minor differences but we shall see what the benchmarks have to say as we pit the Gigabyte 7800GT against the BFG 7800GTX which comes pre-overclocked out of the factory.

Gigabyte GeForce 7800 GT Video Card Review