what we need is not a motherboard that have lots and lots of pcie...

what we need is an interface that can manage many cards where we can plug and play cards without turning off the system..where cards that have a problem would hang or stop separately without affecting the whole system so other cards will keep on mining.

with that kind of interface we can use almost any board out there..that interface should have a software management and hardware switches(like for disabling power) for the plug and play feature.