My PC is a built round a Skylake i5 6500 on a Z170mobo with 16gbs of DDR4 clocked at 2788mhz. My system also contains a gtx 1060 (3gb) and 2 drives a Seagate barracuda 2TB (7200rpm) HDD and a Samsung 850 evo 500gb SSD. The PSU I used was a semi-modular corsair cx650m which has plenty of juice to power all my components. Pls reply with what i should upgrade first.