What connector is this on HP 463172-001 fan?
The fan p/n is written right on the fan.
HP just added a different  connector :

6pin female keyed header right-angle board to cable 3x2row 0.1” centre to the 4 wire interface.

Probably proprietary.
https://www.delta-fan.com/Download/Spec/PFC0612DE-F00.pdf
12V 40W Delco
Why replace? was it bad or just noisy using a bigger fan?