Nice info in thread thanks.
In 2019 at bottom of market i learned about RVII and scooped up 4 of them for my 3rd Gen rig at a cost of $4.5K it broke me as used all my free money to do it. I used the psu, mobo etc from the now dismantled 2nd Gen rig.
I ran them RVII for a year at a loss with Eth dropping as low as $100 if memory serves then we pumped and my investment risk turned around massively and in total i ran those RVii for two years earning round 20 eth, 10 of which i still hodl. There is profit for the brave but dont spend anything you cant afford to lose or at least wait to see fruit of.