It'd prolly be faster on the internal but it really wont matter either way.so are implying that it would be a good idea to install the games on the external hard drive? Besides for games, how much slower would that be vs the internal hard drive?
Not all laptops have that kinda overheating issueget a laptop with a better CPU and videocard, however it is not recommended to play games on laptop, it gets really hot really fast trust me