Well!!
Seems adding the 600B did the trick! well its been :
ETH - Total Speed: 88.754 Mh/s, Total Shares: 831, Rejected: 0, Time: 27:02
27 hours since i added the 2nd PSU, I will get you updated if it happen's again.
BTW what i discovered on inspecting, GPU1 this was the only SATA wires warm to touch which gave the error, Also was the second gpu on sata from PSU, So now only one GPU per Sata line to relive any stress on the wires.
Yeah, be careful with using SATAs. You can overload them really easily without you noticing until crash, smoke and flames
.