I have the 10 fold fan hub and even though the description says that it uses the pwm signal, the speed is not adjustable. any suggestions?

Glad to help - however is explained well on the web site The first connector input is the one dictating the speed. Connecting a PWM or 3 pin will dictate what the other inputs will do. The master input must be a PWM

Can i control fan speed with this hub, say via software or bios?

Yes you can! Just make sure to set it to PWM instead of DC in the bios if you have multiple fans connected to it. Otherwise only the main one that’s controlled will spin at the speed you set.

How do these compare to the noctua nf-s12b redux-1200 case fans for high airflow?

Per the specs of the Arctic Spinning at a full 1800 RPM it is rated to move 117 m³ of air per hour for 13.99$, whereas the NF-S12B redux-1200 PWM moves 100.6 m³ of air per hour 13.95. The arctic fan is around 20 decibels (if you convert .5 sone) and the Noctua is 18.1 decibels. Depending on if you value the extra quiet, or want maximum airflow, those seem to be the seperating points not necessarily on price, but looks are definitely better on the Arctic as well.

Brand	ARCTIC
Item model number	ACFAN00164A
Item Weight	4.6 ounces
Product Dimensions	4.72 x 4.72 x 1.06 inches
Item Dimensions LxWxH	4.72 x 4.72 x 1.06 inches
Color	grey/white
Voltage	12 Volts
Manufacturer	ARCTIC
ASIN	B082VJ7YZ4
Country of Origin	China
Date First Available	December 17, 2019

ARCTICBioniX F120-120 mm Gaming Case Fan with PWM Sharing Technology (PST), Very quiet motor, Computer, 200–1800 RPM - Grey/White

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