Cadavre

Here you go mate. The inductors in the top of the pic (highlighted red) are the source for the 5V. Make sure you have a multimeter to check which trace exactly. I just soldered a wire on the 5V trace. I think it's from the SATA ports.

Imgur

Thanks a lot! So could the pwm (or whatever it is) and ground still be where the fan pins are and just take the + from the 5v trace then? Or should I solder the cable to the ground near the 5v trace?

I'm just making sure so I'm not going to fry the motherboard.

Hi again! I have now given up on using this laptop as an actual laptop and have mounted a 80mm chassi fan that blows air into it by hardmodding the chassi. However, since the original fan pins are only going for 3.3v it doesn't do much airflow.

However, the idle temp is now around 35C instead of 65C (yay!), but as soon as I play games it runs rather hot! So I need to know where to get the 5v output from, but I'm unable to view the attached images in the first post due to lack of posts, so I figured I'll post here and ask if someone could share the pictures some other way or share their knowledge around this motherboard.

Thanks in advance!

It's not so much the fan that's the problem. The cooling system is just badly designed. One single measly heatpipe can't hope to cool a quad-core i7 CPU during hard workloads.

Anyway, I have to admit that I've moved on since then. I sold the acer and moved on to an extremely highly specced alienware

Yeah, of course I understand that. Mine's just an i5 dual core with hyperthreading (it shows up as four cores while it's not), so maybe it doesn't produce as much heat? Anyway it's worth a try to do the mod for me, I just don't have the money to buy a new computer at all. :/

Good on you though getting a Alienware.

Regarding the controller: The controller was made by my new friend. He has multiple pieces, and can build more. I don't currently know exactly what the design is, but if you're interested, I can ask him. Potential buyers could consider having him send you one, I don't know. The controller draws power from a 5V line (i'm assuming USB, but I'm not sure. It's the cables going up to the right-top side of the mobo in the bigger picture) because the dedicated line only supplies 3.3V. The controller has been designed to take input from two heat-sensors (i circled them in the pic) placed on the heatsinks for the cpu and GPU. It takes a mean average of the temp and increases fan speed based on it. It then forwards impulse to the fan.

Sweet fix! I'm getting really tired of my overheating problems with my 5750g as well and this thread made me feel like trying this out. I could go for full speed all the time. I used to sleep with my old workstation on that was loud as **** due to me cheaping out on the fans.

Thanks for posting about this! If you ever find a replacement fan that is quieter that fits without too much effort, please post about it!