1340 MHz core and 2150 MHz memory clock is way too much for a RX 570. Try setting 1200 Mhz for the core clock and 2000 MHz for the memory.
I dont really see how that would help as they crash on stock speeds but i will give it a go
So now they just crash instantly compared to original clocks. Have I messed up my cards or just my bios?
Have checked risers they are all good unless my bios messup destroyd them