I am
I'm running each blade with an HP DL380 G4 server power supply, which can put out 42amps on the 12v line
I had 4 of the power supplies, soi figured why not
I'm running one run of 12 gauge wire from the power supply to each blade
12 gauge is roughly the same as 3 runs of 16 gauge

I'm a big fan of server power supplies
These babies are designed to be run 24/7 for years