Maybe differencing on the output ampere does affect

Corsair AX1200
http://i.imgur.com/MRxuzH6.png
Enermax ENM750
http://i.imgur.com/RZZCbm5.png

I dont know for sure, because I dont have these things. but you may check about it.

*edit: or maybe the broken PSU already "affecting" the avalon