For anyone interested I did pick up the 850AX from a site that listed it as CMPSU-850AX A and it is the same power supply. No where on the box (or the unit from what I could see) is it listed with the additional A in the model.

Don't need 850 watts. But I need to get something local because I need it tomorrow and I can only get Corsair locally. Otherwise I would get one of the other recommended PSUs. They are out of the 650watt and I can get the 850 for $30 cheaper than the 750.

Hey Folks, Looking to make a new machine, have all the components picked that I have used previously. But on a few websites I see the AX850 listed as CMPSU-850AX A. Does anyone know if the additional A in the model number is significant? If it's still made by Seasonic I'm not that concerned, but I d...