hmm the 8600m gt is almost the exact equivalent of the 7600 GT, except it has more features because its an 8-series so it will do a bit better. there is no 7950GX2, so its either a 7900GTX, a 7950 GT or a 7920 GX2. all have the same ram as the 8600M gt, GDDR3. the 8600M GT and the 7600 GT both have a 128bit bus, and the others have a 256bit bus, which is a lot better

so in short i think the 8600M GT should already be able to catch up with most new games for a while, and its the latest technology which is good