I'm using the HP D530 Motherboard/CPU that I installed in a new case with a 600W PSU.
There was a problem with the onboard chassis fan connector (3-wire) not supplying sufficient power to the chassis fan indicated by the fan spinning very slowly, but I never experienced the "512 Error" at boot. Also, the same fan works perfectly connected directly to the PSU.
I disconnected it since I already have plenty of fans connected via the PSU directly. Since then, on startup, I get the error: "512 – Chassis Fan Not Detected" and am asked to "Press F1 to continue". This gets quite annoying since I use this machine remotely (w/ FreeNAS).
What could be causing the onboard fan connector to not be giving enough power? If this is unable to be corrected, how can I make the BIOS think there's a chassis fan plugged in without actually plugging a fan into the onboard connector? Would it be possible to jumper the pins without damaging the motherboard or PSU?
Best Answer
Often some of the motherboard headers are temperature-controlled. This is a desired feature, you just need to go to BIOS settings and define the speed:temp-curve, ie. define what speeds fan should take at what temperatures. Often you can also just make the fan run at full speed all the time, if noise is not a concern.
You can also use wiring where fan gets power from PSU (at full 12 volts) and sends signal about rotation speed to motherboard header. There are this kind of adapters readily available, many fans ship with one. The key is to connect the red and black wires of the fan (+12V and ground) to the PSU and then the yellow wire (rpm signal) to MB header.