I've tried changing the value in the BIOS, but I honeslty cannot find it, the only thing I could find related to fans was 'Smart Fans', I set that CPU setting to max but there is no way that I can find to change the voltage.
As for my GPU placement, its right below the pump, as seen here:
Motherboard manufacturer is Gigabyte model is listed in my system specs.
In terms of what kind if intake I have, I uh... dont really understand the question. You mean like where is it drawing in air? If so I've got two fans mounted at the front drawing in air