It might work but the using of two different PSU's is not really recommended. Did it just stop working? Was there any changes?
Really? This is from the SP20 site under PSU recommendations:
The SP20 were tested in our lab using Seasonic SS-650KM and Corsair CX750M. Each unit using 2 PSU.I've been successfully using a pair of CX750M's on a single SP20E for around 185 days with no problems.
Maybe I'm missing something here?