I have a new system built on the Intel H87-based DH87MC motherboard, running Windows 7 x64. I have one front/"inlet" fan hooked up to the front fan header, and one rear/exhaust/"outlet" fan hooked up to the rear fan header. Both run fine on initial boot or restart. The front fan is non-PWM (3-pin), while the rear fan is a Noctua PWM fan (NF-P12 120mm fan).
When I wake my computer from sleep, the rear fan attempts to spin, but then just stops. All other fans (front fan, CPU, GPU) spin up just fine. I've tried turning off auto fan control in the BIOS, upping the minimum fan threshold, etc., but nothing seems to fix this one issue. I've also hooked up other fans, like 3-pin non-PWM fans, and the same thing happens.
Could this be a BIOS problem? A Windows problem? I'm pretty sure it is not a bad fan problem, as I've tried multiple fans with the same results.
Any help is greatly appreciated, thanks!