Reubennn :
Thanks you guys I will prbably order that psu soon thanks for your help sorry to bother but psu's are easy to install right ? You don't need to answer if you don't want.
They are easy to install, the cables are mostly idiot-proof (they only go in one way). There are ways to mess up, but you would really have to try hard and not follow the instructions. If you have a bottom vent opening in your case (and your case supports bottom mounted PSUs), install the PSU with the PSU fan facing down (the XFX550 sucks in air, you want it to suck in cool air from outside the case).
Follow the motherboard instructions and match the PSU cables with the cables you need to install in the motherboard. The Main 20+4 pin cable connects to the motherboard main slot and the 4+4 pin cable connects to the CPU power slot. Connect the PCIe 6 pin or 6+2 pin cables to the video card and connect any necessary fans to the peripheral cables of the PSU. Also connect any SATA harddrives or SSDs to the SATA power cables of the PSU. Done!
One way you can mess up:
Confusing the 4+4 pin cable that connects to the motherboard CPU power slot with the 6+2 pin PCIe cable that connects to the video card. The both have 8 pins (4+4 vs 6+2), therefore sort of easy to confuse them. This confusion only happens if you don't read the labels of the PSU in the manual or on the PSU itself.