Is this enough power?

500w should be fine, but I recommend going for either the AX or HX series or a different brand all together, the CX series have cheap components. Have a look at the EVGA N2 PSU's, they are about £10 more but built better.
 


Made by SEASONIC. 😀

PCPartPicker part list / Price breakdown by merchant

Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply ($55.99 @ SuperBiiz)
Total: $55.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-01-20 14:38 EST-0500
 


Yes I know that thanks, but the thing is where we live we don't have anything from EVGA., and Corsair is probably the best we can get from PSUs. Thank you very much, I asked this because I know AMD grafic cards need more power in general. Thanks one more time. 😀
 
Stay away from the CX line, go for EVGA SuperNova NEX 650W. (https://pcpartpicker.com/part/evga-power-supply-120g10650xr) $65 on newegg with rebate. Better quality and efficiency, and less likely to randomly die like the CX has been known to do (plus its fully modular)
 


Sorry, but I may have led thee astray; the NEX line isn't that good. I thought it was the same iteration as the second generation, but yeah, its not that much better (if at all). Generation 2 is definitely the way to go with EVGA, usually indicated by the suffix 2 in the name. Corsair should always be Rm or higher. The cheapest between the 2 brands is the EVGA SuperNOVA G2 550W, $75 w/rebate on Newegg. 80+ Gold, higher quality. Good luck.