4745454b :
650W PSUs annoy me. They are too much in most cases, and not enough in others. They can handle CF/SLI setups, but only if the cards are sub 150W. If you have 200W+ cards (meaning 400W+ for the GPUs and another 100W+ for the CPU) you'll be too close to the 650W output limit. About the only time a 650W makes sense is if you buy high draw things such as 300W GPU and 200W+ CPU. In this case you'd need a 650W, if not a 750W. Basically a 650W is just an odd size model that really has few real world uses. People justify them by talking about capacitor aging or adding another video card, but as above, adding another card might put you over the limit of what it can handle.
I get what you are saying. But there is a $1.20 difference in price from a quality 550 watt PSU and the same 650 watt PSU.
PCPartPicker part list:
https://pcpartpicker.com/list/9GcLXL
Price breakdown by merchant: https://pcpartpicker.com/list/9GcLXL/by_merchant/
Power Supply: EVGA - SuperNOVA G2 550W 80+ Gold Certified Fully-Modular ATX Power Supply ($88.79 @ OutletPC)
Total: $88.79
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-10-06 11:52 EDT-0400
PCPartPicker part list:
https://pcpartpicker.com/list/wbV9ZL
Price breakdown by merchant: https://pcpartpicker.com/list/wbV9ZL/by_merchant/
Power Supply: EVGA - SuperNOVA G2 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($89.99 @ Amazon)
Total: $89.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-10-06 11:53 EDT-0400