Hi Phill and Eliovp,
if you want to adjust fan speed standalone;
many delta series fans have internal controller, so you dont need any voltage converter or pwm generator.
wires like this:
Red: +12
Black : GND
Blue: Tacho
Yellow: PWM or voltage control input (we use this pin like that - but i seen very cutted in your picture)
Yellow(comes from fan)--------10K Pot--------->to GND (black)
|_____^
this is a quick and solid solution
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
also i need some info:
- can you backup your bios rom with this and upload for me?
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fdomoticx.com%2Fwp-content%2Fuploads%2FUniversal-BIOS-Backup-ToolKit-2.0.png&t=664&c=2-I3CuqngQnhVQ)
- i need to know panda motherboard chipset too, you can get this info with hwinfo or cpuz,
i seen Pericom PCI-e switch ic on your pictures (expander) for extra pci-e lanes. but i dont know panda motherboard have chipset or any bridge
thanks, have nice days...