Hello, should I go with 650 or with 750 Watts for this build (overcloking)
650 is plenty. You honestly could probably get by with a GOOD QUALITY 550-600 watt, but 650 is certainly safer. People tend to way overestimate the wattage needed for their PSU.
You could get by with a 650W, but I went with a 760W for a similar build.
The 650W is more than enough. One suggestion I have is to upgrade the CPU cooler. I'd recommend a Noctua NH-D14.
That's not a power hungry gpu so 650 should be fine with an oc... 750 is better of course though for future proofing.
650 and a 770 gpu