Mine takes about 12 sec. I have Ga-X99-UD4 with 2-ssd, 4-600gb wd 10,000 rpm HHD. But I only have 16gb of memory.
I don't really care how long it takes to boot. That is just me.
If it is less than a minute to boot into windows I'm happy.
I'm just picking on you about the PSU don't take it in a bad way. But you could power the computer and the house with that sucker.
I look at it at Newegg and boy they give a lot of goodies with it don't they. But it is a really nice PSU.
Like I said just having some fun.