A fan being PWM will not necessarily cause it to pass the diagnostic test. In fact, any 3-pin fan will not throw the startup error . . . but it will also not be modulated.
Hi, I tore my aurora r7 down and kept the mobo and cpu. I now have it liquid cooling and its sweet but the bios is throwing a boot error claiming there is a problem with my cpu fan. After running a failed diagnostics test it let me boot like normal. I must stop this. How do you satisfy this mobo so it stops throwing Dell error 2000-0511 (Processor Fan)? Do the top fan and front fan headers have requirements too? Is the requirement a specific model, rpm rating, both or similar? Any help is greatly appreciated!
Aurora R7, motherboard fan rules