Technically, the i7-4900 can't overclock, it's using Turbo Boost.
Your CPU should have no issues running these games, its the best there is for Dolphin in a laptop. Seconding what DJBarry said, post your graphics and config tabs from Dolphin here so we can see what the issue might be.
Make sure windows Power Management is set to High Performance, your computer is plugged into power, and under Nvidia Control Panel you have Dolphin set to use the high-performance card and maximum power (DON"T SET THROUGH DOLPHIN, YOU WILL GET ERRORS)
Your CPU should have no issues running these games, its the best there is for Dolphin in a laptop. Seconding what DJBarry said, post your graphics and config tabs from Dolphin here so we can see what the issue might be.
Make sure windows Power Management is set to High Performance, your computer is plugged into power, and under Nvidia Control Panel you have Dolphin set to use the high-performance card and maximum power (DON"T SET THROUGH DOLPHIN, YOU WILL GET ERRORS)