speed fan cannot manually force the fan to run at max speed? anyway, nice guide. for variable speed fan can attach a variable resistor but becareful, you might burn one. its recommended to use a proper fan controller as circuit built controllers emits electric pulse rather limiting the electricity via resistor.

i know sunon and deltas can reach such speed but most of them are either 80mm or smaller fans.

copper heat sinks are generally suck more heat out of the processors faster than alu hs. so generally the faster they are better heat conductors. alu is more on the downside but alu can be ultilized as passive cooling. thats the plus side.

threadstarter can also draw out a switch diagram to switch between highspeed and low speed.