Mr_Smartepants, if you are in Keflavik, Iceland (unless im really stupid, and i may be) thats in europe, where did you get a non pfc version?
Iceland is in europe, but I don't think it's part of the european union.
the long at the short of it is that i want to offer a range of silent pc's to the shop i work so the psu needs to be silent stock and not of such a hideous prce as silenx and the like are asking.
PSUs sold in europe have to comply with the IEC/EN61000-3-2 standard, and that means they must have some sort of PFC. If you are running a business, you'd better not sell imported, non-pfc PSUs, cause I think that would be illegal. Now if you decide to sell some even so, and you can ship to France, let me know
Those who find the PFC variant noisy.. is it because of the fan engine/construction/turbulence (possible fan-replacement would help), or because the airflow through the grill (other methods required)?
When you turn on the computer, there is an "airflow noise" that's not very loud, but is definitely noticeable in a quiet computer. After a few minutes, the fan speeds up and becomes loud. Not as loud as in a $15 PSU, but loud. It looks like the non-PFC version doesn't speed up under normal load, so the fan controler has to be different. As suggested by Storm, the controler may be linear in the pf version. Replacing the fan with a sleeve bearing one would probably help, but it would still not be as silent as the non-pf version is. I don't think the grills have anything to do with the noise, they are well designed and the exhaust grill is far away from the fan.
If I run a cpu cooler, the air entering the PSU is much cooler and the fan doesn't speed up. As I don't want to run a cpu cooler (we all know why), I guess I could make things better by ducting the cpu hs to the rear of the case, and replacing the PSUs fan with a Papst 4412. I'm currently testing my cpu temps with the fan sucking instead of blowing, and they seem good, so maybe i'll try it.