Mark Twain wrote:
On the 780 I lift a latch and the side removes.
On the 8500 I undo a screw and slide the panel
back

Here's the cabling the 780:

http://i65.tinypic.com/2zdvr14.jpg

Robert

One thing that's different about that supply, is the
main cable loom exits through a hole in the bottom of
the supply. Most retail supplies are set up for ATX
rather than BTX, and the loom comes out the back.

That means the main cable is going to have to curve
around the bottom of the supply before plugging into
the main connector on the motherboard.

The SATA power looks a bit different than on a retail
supply. The two SATA power connectors are closer together
than normal, at the end of the cable.

I don't think a generic replacement, is going to
look as "clean" as the setup looks right now.

Paul