Off topic in a way .....\n\nThese units are very loud (come with a supermicro case)\n\nPossible mod ... (worked for me)\n\nI Removed the redundant fan controller and replaced both fans with\nvantec stealth 80mm fans .. so quiet now ....\n\nI used a thermal sensor from an aerogate II to monitor the supply and\nit mainatined 80F with full load .. both fans were wired together\nwiith exception of the speed sensors .. I used the single speed sensor\nfrom the rear fan.\nI put the case temp sensor on the outside of the PS and used the\ncase fan control for the power supply to the PS .. I will be using an\nAerogate I to control the case fans.\n\nI could have just as easily used the PS fan power lead (with out the\nredundant fan PCB) to power both fans. Just wanted to let any\ninterested parties know the results .. enjoy :-)\n\nP.S. The existing fan was a 4500rpm Nidec BataSL .22amp ( real\nscreamer) I had wired two vantec stealth fans together and tried then\nin place of the Nidec in an attempt to maintain the redundant aspect\nbut even though they were .10 amp each .. the alarm still sounded and\nthe fans did not run at full power .. (I would have moded the PS with\ntwo fans had that worked) .. So the combined 20 amps did not fool the\nPS .... I have the Aerogate II and I advantage so I stopped there.