Hi all i haven't updated my GPU in a while i'm currently using a ATI 5870 XXX edition now would it be worth upgrading to a Asus Radeon R9 290 "Voltage Unlocked" 4096MB GDDR5 PCI-Express Graphics Card , would i see a massive increase in performance , i think i payed £350 when i got my 5870 and i can get the R9 290 for £319.99 at the moment 
I'm also using a AMD Phenom II X6 1090T 3.2GHz .
was thinking of upgrading to this >> AMD Piledriver FX-8 Eight Core 8350 Black Edition 4.00GHz.
i'm not too sure how the Piledriver CPUs perform just wanted to ask if this would be a good upgrade too.
Tab.

I'm also using a AMD Phenom II X6 1090T 3.2GHz .
was thinking of upgrading to this >> AMD Piledriver FX-8 Eight Core 8350 Black Edition 4.00GHz.
i'm not too sure how the Piledriver CPUs perform just wanted to ask if this would be a good upgrade too.
Tab.