n550jx FPS drops in several games

I recently purchased this n550jx asus laptop, supposedly it has a very good graphic card, two of them actually, nvidia 950M and intel graphical card too, but in a simple game like world of warcraft (which doesn't require that good of a gpu anyway) while I'm playing the FPS tends to drop from 90-100 to 10-15, so you can imagine how frozen/slowly my screen would be at that point, it drops for 3-5 seconds then back to normal at 90-100 FPS, and this happens during fights and few times a minute, so it's quiet alot, I suspected some failure in the system itself so I went to the store and replace mine with a brand new one thinking that would fix the issue, but its still there.

Can I change anything in the settings to make my gaming experience better? or is this laptop just not for games?