Will the R9 270X do the job for me?

It stays under 60° under heavy load, is quiet, fastest r9 270x, has also a lot OC potential left, got backplate for extra protection and very good quality of components but it is also the largest GPU and you need to see if it can fit in your case.
 
get the toxic or devil. there both highest clocks and 3 fans. and the 270x is better than the 7870 idk why people say ohhhh its a rebranded 7870. no its not its in between 7870 and 7950. the devil was 219$ at newegg but they are sold out unfortunately
 
Sapphire has the toxic, Powercolor has the devil which is a bit slower, and the 2nd fastest r9 270x, warmer and in general less OC potential but it is also a good GPU.