i doubt there are fpga for x13 already, come on it would be insane..., the x13 mania just started two days ago

one 280x can do 2.5M on x13, reaching 50 giga with those cards is not that crazy as you think

50 giga are like 20k 280x, 200 big farmers with 100 cards each is quite easy to achieve

the real problem are those big farms, that keeps adding gpu because they can make roi for each new rig very fast