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Can you hook up fans to the PSU and not via the Motherboard?

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August 27, 2013 4:37:13 AM

So I've Recently built a gaming PC however I'm not totally happy with how hot my GPU gets (32c - 35c Idle. 49c - 55c whilst gaming) My Specs are.

CPU - Intel 3rd Generation Core i5-3570K
CPU Heatsink - Corsair Hydro H60 with 120mm Fan
Motherboard - Asus P8Z77-V LX
RAM - Corsair CMZ8GX3M2A1600​C9B Vengeance 8GB
PSU - Corsair Builder Series CXM 750W Modular 80 PLUS Bronze Certified
GPU - Asus GeForce GTX 660 2gb.
HDD - Western Digital 1Tb

The Case came with just 2 standard 120mm Corsair fans however I don't have any more fan connectors on my motherboard and I was just wondering is there a way I could just hook another fan up to the PSU?

Any Advice would be great, Thanks.
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a c 172 à CPUs
a c 160 V Motherboard
August 27, 2013 4:40:05 AM

Yes, you can get adapters for them to plug into molex connections on the PSU.

Those temps are VERY good. Most GPUs get much hotter than that. You will not be able to lower them much if at all because they are already VERY low. you have no problems at all here.

Modern GPUs can hit 75+ before it is even remotely an issue.
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August 27, 2013 4:40:48 AM

You should be alright. Most (if not all) PSUs come with Molex connectors (the transparenty white things with 4 pins in), which will connect straight into a fan's connectors (again, if they have a Molex connector).

However, the motherboard regulates the speed of the fans, and when connecting straight into the power supply, the fans will be at max the whole time. Good for cooling, can be annoying on your ears though.
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Best solution

August 27, 2013 4:55:53 AM

houldendub said:
You should be alright. Most (if not all) PSUs come with Molex connectors (the transparenty white things with 4 pins in), which will connect straight into a fan's connectors (again, if they have a Molex connector).

However, the motherboard regulates the speed of the fans, and when connecting straight into the power supply, the fans will be at max the whole time. Good for cooling, can be annoying on your ears though.

Technically, you can modify the pin order on your fan molex connector to get a variety of speeds. Here is one guide.
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