Hi.

I am in the process of putting together my new system in my new Lian-Li PC-A77 case. So far this is seeming like a nice case, it comes with a little LED display which connects to the case fans and lets you control fan speed / temperature via the display. Great idea, wiring it up has me confused.

The Lian-Li instructions seemed simple they were ( and i quote ) :

"
Step 1: Remove 2 screws to set up thermomemter.

Step 2: Put Battery.

Step 3: Done!
"

Now I am no expert on fan cooling but having unscrewed the display and put the battery i do not think that i am done.

In addition to the molex power connector the display has:

3 x 3 pin connectors labelled

- CPU
- sysf-f
- sysf-r

3 x Thermal sensors also labelled

- CPU
- sysf-f
- sysf-r

and a 2 pin connector that connects to the M/B to display hard drive activity.

My questions are:

What do i connect the 3 pin connectors to ? The labels suggest i connect one to the CPU fan, one to the front fan and one to the rear fan. But the Lian Li PC-A77 has 2 front intake fans and 2 rear output fans? what connects to what ?

Where do i affix the thermal sensors?

The 2 pin connector on the M/B for the HDD activity LED is already occupied by the connector for the orange case LED, i cant connect both to the same connector

Any advice people can offer on how to set this thing up would be greatly appreciated.

Aren't yours labeled like in the photo? I believe there's a pass-through in each wire. Basically:

[cpu fan]---[cpu cable]---[fan controller]

You plug the cpu fan in the cpu cable. Look for a label on the cable or trace it to the circuit board. The rest don't matter. Could be psu fan or case fan.

As for the thermal sensors, they should be taped to the same part as the fan. i.e. cpu sensor to cpu heatsink. As close to the core as possible. It won't be as accurate as BIOS or core temp.

the thermal sensor will be upto you where to put them as the temperature reported wont be accurate might as well put it at HDD Video card back and northbridge to monitor the accurate temperature. if there is not enough connector for all the fan just connect as many fans as you can or you can do some modding and connect 2 fan to one slot.

as i have said before if there is not enough connection leave it.

Thanks for the replies guys, yeah the wires are labelled like the picture.

So i connect the other ends of those wires directly to the fans instead of the molex connection.

The CPU wire is the one that confused me because the not so helpful instructions say "Fan controller for system fans only. Do not use with CPU fan". Then why is the cable labelled CPU >< ? Maybe its their way of saying "dont blame us if your CPU overheats"

I guess i'll put one sensor on top of the HDD and one at the top back somewhere. I wonder if there is some kind of cable that lets me hook two fans up to one

you will have to solder the 2 pair of wire together from 2 fans.

How about using a splitter cable like this ?

http://i12.ebayimg.com/04/i/001/04/d2/edea_1.JPG

yeah that will do if you dont mind paying

BUT

you fan controller might not handle it and end up blowing the controller.make sure power per channel is higher then the 2 fans add up together.

They are only 99p a pop

absolutely no information online or in the instructions on the power limitations, i guess i just chance it and see

yeah chance it since you wont blow a million pound hardware. you can always get a aftermarket fan controller thats looks and works better anyway.

If you monitor the cpu temp, you can leave the mobo cpu fan connector disconnected. That's what the case manual is implying. Some mobos won't post if the cpu fan is not connected. Mine is not either, but I monitor the cpu temp with core temp.