I, too would like to add my voice to Zztonys' thread. I have been running lion on a single W5590 for over a year with very few issues. I would love to know if it is possible to run two. I doubt if I can be of as much help as speedyrazor though, as I only have one W5590 at present (I have the risers\heatsink etc.) I do have a 5503 - would I risk damaging the computer by installing such a mismatched pair?
Many thanks iMick and crew for the fantastic work you are doing, it really is greatly appreciated.
meant to say many thanks bronxteck, iMick and crew !!!