HotHardware.com posted a review on the NVIDIA GeForce GTX 275
>> NVIDIA GeForce GTX 275 Unleashed
This will no doubt be an exciting day for graphics card aficionados. As we've shown you here, AMD has literally just launched a brand new more powerful, single-GPU based Radeon, dubbed the Radeon HD 4890. However, arch rival NVIDIA has something on tap as well, in the form of the GeForce GTX 275. And wouldn't you know it, the GTX 275 is positioned right alongside AMD's latest offering.
As its name suggests, the new GeForce GTX 275 is based on NVIDIA's 55nm GT200b GPU, which is also employed on the GeForce GTX 295, GTX 285 and some GTX 260 Core 216 cards. The new GTX 275's performance level--as you have probably guessed--is expected to fall somewhere in between the GTX 260 and GTX 285. Where exactly it falls on the performance scale, we plan to show you on the pages ahead...
>> NVIDIA GeForce GTX 275 Unleashed