If I was looking to buy a new laptop that could be used for some lite gaming, I would make sure it did not have 1. dual graphics / switchable graphics. They are problematic at the least. CPU is also important. Here is a list of CPU's and GPU's benchmarks. It will give you a rough idea of how they compare.
GPU > http://www.videocardbenchmark.net/
CPU > http://www.cpubenchmark.net/
Intel I7 960 @ 3.87ghz *Intel DX58SO *AMD R9 290 4gb *Corsair TX650M *2x4gb Corsair XMS3 *WD Black 1TB *Windows 7 Home Premium 64bit ***Asus N71Jq laptop *Intel I7 720QM Processor *Mobility Radeon HD5730 1gb *8gb Ram *Windows 7 64bit ** Toshiba P75-A7200 * Intel I7-4700MQ * Windows 8.1 64bit
***** cetera fallunt, ludere mortuus ******