Re: Is this psu safe?

I'd say just use it as it is and do a checkup at 1year for caps. I used many cheap & nasty PSUs in my youth, never had any catastrophic failure. None of them had considerable load though, because I could not buy an overpowered CPU or video card. This particular PSU is way better than those but it sure has some questionable caps on the secondary.

The one PSU that literally exploded (caps) with lights and smoke was a CWT Antec from around year 2001 (burst in 2003). From than on I began having an obsession with PSUs

Re: Any late model PSUs that use 12.5mm diameter capacitors?

I've made a mental note 2 years ago . I better write it down.

Enlight labeled Delta GPS-350xxx with 80mm fans were populated with 12.5mm caps on the 12V side.

You could always leave the leads longer. It works in smaller, less cramped PSUs.

Re: FSP 350PN high pitched sound

Nothing seems to help. I've poked around many times, with a rubber-ended pencil, no loose cores, no change in the annoying noise.

I've been to the shop today, and listened to another one, it's the same thing. Unfortunately they did not have a Greenline, so I couldn't check that series.

I'll buy a greenline & a seasonic S12-430 for two new builds, just to see how they compare, and if any of those makes strange sounds.

Re: FSP 350PN high pitched sound



On the side of the transformer "SPI 8TC00206". This is the small one (stand-by). The big one is "SPI 8TG00212". DASH is on the last line, don't know what it means.

Well, I can hear it from across the room. Not when it's in stand-by, but when it's on. It's definetly not the PFC coil. I removed it, listened to it while on, it's completely silent.

Thanks for replying. At least I know that it's not just mine.

Tips for another, SILENT & cheap but reliable PSU? I really...

Re: FSP 350PN high pitched sound



Apparently it's NOT. And it's not the passive PFC. It seems to be the stand-by transformer. When I measure the voltage on the big diode nearby the sound changes in pitch. The same thing happens when I start start the unit.

Just as Spacedye69 said, it goes away slowly (discharge) if i pull the plug.

Damn PSU makers. They can't even buy a decent enough transformer. The 3 main transformers are labeled "DASH 2 B-5". Don't know if that specifies the manufacturer, but I want them to suffer ....

Re: FSP 350PN high pitched sound



Mine is dead silent in standby. It starts when i push the damn button. Today I saw an enermax doing the same thing. And the owner doesn't even notice it. In 10 years maybe I won't hear it anymore.

I've got to check the discharge thing. Even stanger is that I did not notice the noise when it sat before me.

Tomorrow is psu hacking day. Again. I've got an Antec to service (my first repair - i hope), I know it's not worth it (SmartPower SL350), doing it for experience ....

Re: FSP 350PN high pitched sound

Passive PFC is really easy to remove. I'll open it up once more and try to locate the source.

Heatsinks are really small, so i tugged a thermocouple in between. 40 C, under load (A64 Venice, 2.4Ghz, GF62000 - yeah, pretty lame).

Just bought a 350PNF. Really cheap, expected somewhat bigger rectifiers on the output side. Don't know what they are, because you can't see them (and i don't want to void the warranty - yet). The unit is not sealed, so you can open it up without losing it.

There's one big, no, Huge problem with it. It constantly emits a high pitched noise (whine, really). It's not the fan, i stopped it. It's electronics. Could be a cap. Caps are cheap (OST 680u/200V, Teapo & OST on output, nothing really small or really big: 2200u, 3300u).

There's one other guy who noticed it...