Its just two of those rx580 so the 650watt power supply is more than enough for every algorithms that you want to mine, on ETH those cards takes 80watts each = 160watts and on ravencoin those cards takes up to 120watts each = 240watts, still not even close to the half of 650watt power supply.
You are wrong. This cards need 120w for ETH - you can´t use the software reading for this - AMD only show the TGP in every software - so you must add around 30-40w to every card.
Example - Teamredminer show 530w for one of my RX570 rigs - from the wall it is 880w.
Same for Nvidia, but here you must only add around 10 - 20w per card to the software readings.
Yes i know no one will hear this and no one will trust to my words, it is so annoying that so much people don´t trust to my words every time. But you lie to yourself if you think such software readings are the truth.