New GPU not running as it should?

[rxlyaT]

I'm fairly new to all of this, just slowly been building my PC over time. With all of these great games coming out over the next couple of months, mainly BF1, I decided it was time to get a new card, I had a XFX R9 270x 2GB and decided to put a little bit of money behind and managed to get a new Radeon RX470 8GB.
It's all installed (once i realised I needed a new monitor as well) and everything seem to be good, until I play games.
I've read reviews and benchmarks and gather I should be hitting over 60FPS high on most current games but I'm struggling to hit a steady 60 on medium.
My Specs;

AMD FX-8350
8GB Ballistix Sport RAM
Gigabyte GA-78LMT-USB3
Radeon RX470 8GB
XFX 450w PSU

Would anyone be able to help me figure out what is wrong or if there is something that's restricting my card.
Many Thanks!
PS, I have used a program that has wiped all previous card drivers and still no luck.

 

[rxlyaT]

I'm getting mixed signals, some forums are saying it's the PSU others the Processor, I need to figure out what I'm going to upgrade and not waste money on.