Look to Cnet reviews or http://www.tomshardware.com to get benchmarks on the notebooks of choice with 3D results.
The chipset/RAM is not enough to make this call.
Bob
I had asked before between both which would be best but most said since the centrino aka pentium M didn't have dedicated video is not the preffered choice especially i lik to play games. But I seen some now with dedicated video whether it be a ATI like X600 or geforce 64mb now over all with dedicated video which would be the best choice over all including game plays?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic