https://www.youtube.com/watch?v=w2lmJTPKCP4&feature=emb_logoP4000 mining ETH = 27 mhs stable
$ 1000 for 27 megahesh, it's expensive
Did you buy these video cards for mining or professional software?
Professional graphics cards are designed for constant workload, but you have to monitor their temperatures.
P4000 is different from quadro RTX 4000 and I believe the RTX is the newest and also have better hashrate but too costly for the hashrate still, the kinda money one can throw at RTX3080 and get near 100MH per second, not a good plan imo