Tell us, @
PatrThom, do you have some masochist tendencies you're not telling us about?
The thrill of the hunt.
This is not a job (though from time to time I've considered monetizing it), but "merely" a hobby. The volume of requests for tech help is small enough that I feel like I'm Making a Difference rather than Making a Living, so it is still something that I enjoy. I truly believe my purpose
on this planet in this Universe is one of collecting and disseminating info, and I get a charge out of researching which hardware meets a stated need. I really get off on
learning new things, and the research that I do to most closely match requirements puts me in Hot Pursuit. We currently have a thread going on
about how to lose one's self, and I can tell you that when I go from page to page, from review site to manufacturer website to retailer listings, all the while with lights flashing and sirens blaring, it really gives me a feeling of accomplishment when I find what I'm looking for, or conversely when I conclusively find that something is just not possible, not to mention all the knowledge I pick up along the way. I have even gotten better dealing with the people who don't take my advice or who pooh-pooh my efforts, since after all, it
is just advice, and if I end up being the only one who benefits from the interaction, then so be it. At least I don't walk away empty-headed.
My MB has a "power fan connector". Except that my PSU doesn't - it does have a fan, but I guess it takes its power directly? Or something? The only two connections between MB and PSU are the big 20 point connector and a 4 point ATX connector (at least I hope it is - there's two of them coming out and heaven knows where the other one should/could go).
My MB is Micro ATX, while the case is made for regular ATX. Oh well, still fits. However, my case has 2 fans, plus of course the extra cooler I bought....And the MB only has one "case fan" and one "CPU cooler fan" port. So I guess I either won't be using one of the on board fans, or the extra one I bought is useless? Can/should I connect one of the on board fans to the power fan port? Does my PSU DEFINITELY have a fan connector to the MB (it would seem logical - to control when it's spinning!) and I somehow missed it? Gah!
All in all, the PSU has 4 cables coming out (and a whole bunch of extra cables and ports to plug them in, leading to pretty much everything else). Since the others are all provided as loose cables and connectors, I assume these are four I'm supposed to be using. As mentioned, there's one big 20 pin connector -that one's easy. There's 2 4-pin connectors, one of which I assume has to go on the MB since iot has a 12V-4-pin connector slot...But they're put together in one sleeve, so those two heads aren't moving far from one another. The last one's an 8-pin connector. No idea where that one goes, but I haven't put anything in yet so I guess I'll find out.
Or, since it's listed as an "EPS 12V 8P/4P", is that the one that should go into the 4-pin connector on the MB? The manual for the power unit is a very literal 1 page.
So far, err, well, I managed to screw in the PSU and MB without breaking them? I think?
HALP
From the top:
The fan headers on the motherboard are there to power your fans. They usually have
either 3 or 4 pins depending on how much control the motherboard gets over controlling their speed. It is also possible that you may have a header specifically designed to connect to the fan in your power supply (some PSUs
do have a cord for this) so that the system can sense and/or control the speed of the fan in the power supply. Otherwise the PSU fan is just connected to the PSU itself, internally, and you don't worry about it. Some motherboards have an 8-pin connector for the CPU, so it is possible your PSU has 2 4-pin connectors
which can be joined into a single 8-pin connector if needed. This would explain why they are so close together. Likewise, some PSUs have a 24-pin connector that can be split into a 20+4 connector in case your MLB doesn't need all 24. It is also possible that your solid 8-pin connector is a PCIe power connector for the GPU, if this is the case you will be able to tell because it may allow you to
detach 2 of them in case your GPU only requires a 6-pin PCIe connector. Micro-ATX motherboards are designed to have their mounting holes in the same location as full-size ATX boards, which is why it still fits in the case. They are just smaller (square instead of longer rectangle). Depending on your fan/board, it may be possible to use that PSU fan header to connect your extra fan, you will just need to know that when the BIOS reports something about the PSU fan, it actually means fan #2. Otherwise, it is quite feasible and not at all unusual to connect a fan to one of the many drive cables. It will probably run at full blast all the time, but at least it will run. There are a number of aftermarket fan controllers out there to help you with this, if you so desire.
the motherboard doesn't actually treat a power supply fan differently than any other case fan. They are just labelled this way to make fanatics buy expensive power supplies with a controllable fan.
You are
mostly correct. Some motherboards treat the PSU fan as a "sense-only" and so only read the tach output rather than trying to run the fan. It should be immediately obvious whether this is the case, and having a non-working case fan will not cause the computer to die (not quick enough to matter, anyway). As far as the CPU fan goes, try to match the proper headers whenever possible. If the BIOS decides the CPU is overheating, for instance, it will turn up the speed of whichever fan is connected to the CPU header but this will be bad if the temperature doesn't come down.
--Patrick