iXBT Labs has posted a review on the Gigabyte GeForce GTX 275 and GTS 250

This article is devoted to new graphics cards from Gigabyte. We have two products based on NVIDIA GPUs from different price and performance ranges: GeForce GTS 250 (aka 9800 GTX+, based on the good old G92) and GeForce GTX 275 (an intermediate between GTX 260 and 285, closer to the latter in terms of speed).

Gigabyte GeForce GTX 275 and GTS 250 Review