My new motherboard is an ASRock 770 Extreme3. I believe in keeping things cool, so I installed a fan on the back of the case and plugged in the power cable into the CHA_FAN1 socket. It did not run. I tried the PWR_FAN1 socket. Same result. I rebooted and checked the hardware section of the BIOS. Both socket options were whited out (not selectable). It looks like the BIOS does not support either fan control. Should I hard-wire the fan to the +12 from the power supply?
Thanks.
On 06/15/2012 10:06 AM, ionmich wrote:
> and plugged in
> the power cable into the CHA_FAN1 socket
does the socket have two pins or three?
does the fan’s plug have two receptacles or three?
if ‘both’ have two OR three pins then try turning the fan plug 180
degrees so that the pin that was originally inserted into the fans A
socket is now in the B socket…
but, if the motherboard has three pins and the fan has three sockets
then you need to try the middle pin in both the A socket and the B
socket, as well as turning the fan plug 180…
do you follow that?
say the fan has two sockets named A and B, and the motherboard has three
pins named 1, 2 and 3…then you need to try several combinations with:
A filled by 1 and B with 2
A filled by 2 and B with 3
A filled by 3 and B with 2
A filled by 2 and B with 1
oh! are you sure the fan works?
and, i would not suggest you ‘hot wire’ it as it will run full speed,
full time…
finally, are you pushing air into the case, or pulling it out with the fan?
well, there are cases where you will DECREASE cooling by adding a case
fan in the rear…
most (many? all?) tower cases as best ventilated with a fan in the front
pushing air in, and then let the power supply (top back) suck the air
out of the case, cooling itself and everything else as it does–VERY
important is to not let huge wire bundles dangle all over and block the
smooth flow of air from front bottom to rear top…
–
dd
Mostly the plugs have a clear front and backside. The FAN options in the BIOS aren’t about whether there’s power on the connectors, they are about whether these connectors can be controlled, i.e. whether fan speed can be changed.
But first check the fan. It wouldn’t be the first one that left a factory in a defect state.
> It wouldn’t be the first one that left a factory in a defect state.
+1
–
dd
BINGO!!! Talk about ranting. It took a long time and special screws to mount it as there was almost no clearance off the motherboard. Thank you. I should have had the good sense to test it first. Oh well, I won’t make that mistake again.