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I have a single pwm header for the cpu fan. I want to try something like that but was deterred by stories about proprietary dell fans even some with a logic chip. I'll have to look into it since there is a small batch of 3010 and 7010mt optiplex in my living room

I'm trying to use an Arctic F-12 120mm fan (1350rpm max) with a dell optiplex case/mobo. Even with the fan wires re-arranged to match dell's pinout, it doesnt spin up and bios settings are a joke. I've got this cheap controller coming in the mail but if its not a good idea guess I'll have to...

Looking for a simple way to lower rpm for a case fan, can't use pwm. Does this look like a house fire? Not sure if something like this is ideal compared to the 7v molex trick or even a resistor cable. Using an evga 650bq for power