since i'm a place called - "never Nexus, never papst, never panaflo" always sunon and since i've been reading this thread i decided to go for this solution that scares a lot of people, using 220V AC fans in your PC.
so i did, i ordered them from one of the stores in my country [some lost place in europe called Romania].
at the moment i'm caught up with school and other things so i can't quite keep a steady flow on information for you people about these fans.
getting back to the subject, i received them. turned them on - at 220V LOUD - moving a lot of air. Since i'm very time restricted i didn't have time to build a fan controller for them. them, yes, i have 2....so I decided to run them serialized, that way they will have 110V running though them.
they were set upright on my carpet and i plugged them in....they start out very slowly, takes them like...10 seconds to get to their full speed. I can't say i'm an expert about the way the fans SOUND, identifying the types of sound a fan makes, but from what i could tell the only thing i was hearing was airflow noise. and it was not silent, u could slightly hear them standing 1.5m above them. at 110V they moved a lot of air, i can't say how much, i had a small pharmacy envelope 1m away from them, it wiggled from the airflow.
another thing i noticed about them....they were VERY sensitive, noisewise to the restricitiions i placed upon fan intake. I moved my hand close to the blades , where the air was sucked through the fan, and the noise was rapidly increasing, both of them reacted the same, so if u are plannning to make them suck air through your heatsink, probably not a good idea.
I Did the same thing to the exhaust of the fan, the increase in noise was either very small, or non existant. these tests were done with my ear almost stuck to the fans, so i could hear as many sounds as i could.
I can say i'm sort of impressed, without doing too much tweaking on them, just running them at 110V, i'd say they are promising, maybe at 90V they could be the best thing after the nexus.
i haven't had a chance to mount them in my case...because the case it'self is work waiting to be finished, but i feel confident that these 2 could manage to cool my A64 venice my HDD and the chipset. i plan on making a tunnel with these 2 fans at the ends, a push pull mechanism. intake at the bottom and exhaust through the back near the CPU, next to the PS2 port on the MOBO.
i'll report back when i get more work done on my ideas, and hopefully i'll have something u can compare noise to