Amd cpu fan control4/30/2023 ![]() ![]() The 4-wire setups on newer graphics cards you can pick whatever RPM % you want and it will get fairly close to the specified target. For example the 3-wire on my A8N has at least 5 "tiers" it can select for the CPU fan. Modern PWM is very granular, and older voltage controlled setups (3-wire with tach return) will usually have somewhat more granular control than 5-7-12. ![]() I'm thinking fan speeds change with resistance (you can only use 5v, 7v or 12v afaict). I don't see how much larger CPU fans can use less than 12v. Wired 55mm cooler to 5v recently and sometimes took a while before starting to move.
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