Just curious – did you check if those Noctuas were spinning when the BIOS triggered the alarm ? What was the error message you were receiving ?
They all spinned but since they were standard PMW fans the motherboard did not detect them and reported "Chassis fan not detected. Press F1 to continue" at every boot. So everything worked but i got tired of pressing F1 and was thinking "what if the fans do fail, i will always dismiss the warnings...". (Yes, i know... Image may be NSFW.
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Are you replacing the two rear chassis fans as well? They have a 6-pin (?) connector. I will follow your progress since i want to change the fans before i sell my Z800. Image may be NSFW.
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