So what's the negatives of a PC Power and Cooling Turbo-Cool?

There are a few downsides to the Turbo-Cool 510W.  One of which being the price.  This particular unit costs almost $200.

Another downside is the fan.  Although PC Power and Cooling brags that their power supply only "needs" one fan, that one fan is a Delta 3-blade fan with highly dished blades.  It is quite noisy.. and I'm not talking about the high RPM setting that it kicks into when the temps get over 40C.

The final "downside" is aesthetics.  Hardly worth mentioning actually.  This power supply is for use in a box that was meant to be USED not looked at.  It's rather industrial looking with it's flat black finish, but it's not hideous.  Hell, I'd slam it in a window case just to show off that I'm actually using a high quality power supply as opposed to an over-rated, pimped out, box of crap.

The PF rating on this power supply is as good as it gets.  It's advertised as .99 because you can't really say something has a power factor of 1, but my tester telling me I was getting a power factor of 1 about 99% of the time!  To be politically correct, I graphed the power factor at .99 on the next page.

Efficiency was mediocre, but decent for a power supply with such an excellent power factor (typically, I would see a lot less efficiency when a power supply has improved power factor.)