Quote from: erpbridge on August 25, 2013, 04:32:56 AM

The one issue I can think of that you might have it that the motherboard, being of an age that it won't have PCI3 slots on it... may not be able to supply the operating power over the PCIe slots for all the cards you use. (Difference between the communications power over the pins, and the actual hashing power supplied by the 6/8 pin connectors.) You MIGHT need to get powered riser cables if you run into problems of the system crashing under what otherwise should be valid working conditions.

There is no change in the power spec between any version of PCIe.

Quote from: nextgalaxy43 on August 30, 2013, 10:51:19 AM

Is 3.0 have the same power specification as 2.0?

Yes.

The PCIe power spec hasn't changed since PCIe 1.0.
75W for 6 pin connector.
150W for 8 pin connector.
Up to 75W from motherboard (10W from PCIe x1 connector, 25W from PCIe x4 & x8 connector, 75W from PCIE x16 connector).
Max of 375W for dual slot card.

PCIe 4.0 may have some changes to power configuration. It is still in draft form and not expected until 2015.