All fans running at full speed

[Hollow704]

So I built a rig of spare/donated parts I had laying around for a buddy of mine who has no consoles or computer at all.

The issue is that all of the fans in the pc (including the power supply fan) constantly run at max speed no matter what I do. I've tried adjusting the bios settings but regardless of which options I choose the fans have no change. I've reset the cmos, I tried flashing the bios to the uefi interface but it fails. The Temps are all really low, everything was cleaned and repasted with Kryonaut thermal grizzly to make sure heat wasn't the issue but all stats point to low Temps.

The Cpu fan is a 120mm 4 pin pwm, the exhaust is a brand new 80mm 3 pin and the intake is a 120mm 4pin and they are all plugged into the board to their corresponding header.

here are the specs :
I5 2600 w/hyper 212 cooler
ECS P67h2-a3 mobo
12gb gskill 1600mhz ddr3
R9 280
128gb SanDisk ssd
1tb wd black hdd
600w OCZ psu

The computer runs perfectly normal other than the fans at 100% constantly. Thoughts plz?

 

[Hollow704]

Also before someone says ew ECS, or Well you're using an OCZ psu... I know, those were donated. Would never use otherwise

 

[Paperdoc]

You say, "they are all plugged into the board to their corresponding header". Well, the mobo has three fan headers: CPU_FAN (4-pin), SYS_FAN (3-pin) and PWR_FAN(3-pin), and you have a CPU cooler, TWO case fans and a fan inside the PSU.

Focus on that PWR_FAN header. That's an older design feature with a particular purpose you are likely NOT to use. It is only for use with certain PSU's that had a special set of wires coming out of them that look exactly like fan wires, and end in a 3-pin fan female connector. The ONLY purpose of this was to allow the speed signal of the fan inside the PSU to be communicated to the mobo on this header for your information, and MAYBE to monitor that fan for failure. It is NOT used to control the speed of the CPU internal fan. SOME CPU's do their own internal fan speed control, and some do none - that is, they always run their fans full speed. But NONE of them arrange to have the mobo PWR_FAN header control the PSU fan. So, if your PSU does NOT have that special cable coming out of it, that PWR_FAN mobo header is NOT to be used.

Why? Well, in the original concept, all it could do was accept the PSU speed signal. In later designs many mobo makers also hooked up to its pins the +12 VDC and Ground leads used on other fan headers. BUT they never built them with fan speed CONTROL ability. The power on Pin #2 is always the full 12 VDC. so any fan plugged in there will run, BUT only at full speed all the time. So, if you have one of your case ventilation fans plugged in there, that is the likely source of the high fan noise you hear. In that case you need a simple fan SPLITTER so that both the 80mm 3-pin and 120 mm 4-pin case fans can be connected to the sole SYS_FAN header which should be able to control fan speeds. I say "should" because in fact the mobo manual I found says you can see things like fan speeds and voltages in BIOS Setup, but says nothing about any ability to customize control of the fans.

 

[Hollow704]

I unplugged that fan(which was the intake) but no dice. Still running st full speed. Checked the bios and turned it silent but still nothing. I may be headed in the right direction at least

 

[Hollow704]

Still nothing so bump