No way of extending it unless you have a cable custom made. Which will likely be extremely problematic. The External PCI-express spec I think allows for theoretical lengths of 10 meters, but I know there is alot of complex stuff that goes into that. Things we haven’t developed or tested, and it most likely will not work with a passive cable (such as we provide).
That said, it is probably far easier to put the computer by the rack and extend the DVI to the monitor and get an active USB cable to for the keyboard and mouse. This has the benefit of using inexpensive, proven tech and also moves the computer and attached storage away from the user for a more lovely computing experience.
Well, that’s how I’d do it anyways.
Sincerely,
Joshua
Director of Support
Blackmagic Design Inc.