That's another low-end GPU.
The way that you can tell is (on nvidia) the first number is the series number, the second is the series grade, and the third is whatever they fuck they want it to be.
At this point the series doesn't matter much because they're all new enough and you don't want the series grade to be below 6.
Prefixes GT, GTX, and GTS are The consumer grade. GT is medium-low end, GTS is high-end, and GTX is enthusiast.
grades 1,2 and 3 are generally made to shit out low-end powerpoint presentations on low resolution business projectors.
http://www.newegg.com/Product/Produc...82E16834220936
Try that guy. GTX 260m is more powerful than GTS 360m because of the prefix conundrum. You might be losing a little juice on the processor, but overall gaming performance won't really be impacted much, if anything you should see improvement just because the GPU is more powerful.