GeForce Go 7600 GT is a middle-class level GPU and a tweaked GeForce Go 7600. It can use up to 256MB of dedicated video memory, and it's available with DDR/DDR2 or DDR3 memory types as well as either a 64 or 128 Memory Bus Width.
The performance depends A LOT on the memory type + Memory Bus Width it features. Games like F.E.A.R (from 2005) might run on the highest settings (DDR3 + 128 bit bus) or might be only playable in the lowest settings (DDR + 64 bit bus).
All in all, the most powerful version is still not good enough to play any of today's current games.