Further updates
I've been busy trying to stabilize my rigs, 90% of my problems involve riser issues and cards "falling off the bus" the rest is just the typical overclock/undervolt issues and finding the right settings. I have to praise SRB BIOs mod. It literally saved me as 'one-click' PBE was awful for these Hynix cards. Resulting in tons of crashing and BSODs. Once I tried SRB it increased my hashrate for Hynix and Elpida to 30mh/s per card at 1950-2000mhz@860-875mv(core/mem) which is about 120w~ a card. Total hashrate for my rigs is around 385-393mh/s for 13 GPUs @ 1650w~ total power per rig.
Interesting regarding SRBBioseditor i found that his straps for hynix a way tighter and more unstable the PBE (elpida is more the same). But with his straps xfx 570 4gb hynix i can barely go over 1980 and get like 29,9 (and seriously unstable) on PBE i can get to 2015 w/o errors and reach 30,4mhs