Looking for a higher spec power supply for a Optiplex 7070 MT.  So far I found/tested these:

360W (H360EGM-00 19YR3) - Works, only has a single 6pin PCIe GPU power 

500W (D500EPM-00 5K7J8) - Has the exact form factor to fit in my 7070MT but does not work.  Not sure if I just got a bad unit or its actually incompatible.  I get a flashing orange power light.  2 pulse code and if I push the power button it goes into a single pulse code.

460W (H460EBM-00 92WNC) - Some sellers are listing this as compatible but I have not purchased one yet.  Comes with 2 6pin PCIe GPU power.

Am I missing anything?