Pure :banana::banana::banana::banana: Aka bitspower! (pics)

[orclev]

2, part 1 and 2.
750i needs just 1 I believe.

Depends on the manufacturer. Some of the 780i need only 1 block, some need 2... there's a chart someplace that lists what model has what blocks, I just need to find it.

Edit: This is from the EK site and lists compatibility of their blocks, but seems like a good enough reference. ASUS 780i needs 2 mosfets blocks, but the EVGA 780i (both of them) is listed as only needing 1 mosfet block. I know the EVGA 780i I have has a fairly beefy heatsink/heatpipe on the left of the 775 socket, but the mosfets on the top side of the socket only have a very tiny heatsink attached to them without any heatpipe. Presumably that little heatsink is able to handle the load just fine.