Dell T3500 - Quadro K4000 - 2/3 screens and full fan noise in OSX

Just swapped my old Quadro FX 3450 for a much nicer Quadro K4000, and suddenly straight after POST the case fans are howling at full throttle through everything. I also lose USB power to the keyboard at boot. I've booted into windows and installed the driver's, and have 3 screens live, but in High Sierra, I'm only getting 2 monitors detected. Being Kepler Architecture, the Quadro is natively supported.

What would cause full throttle fans and the 3rd screen not detecting?

submitted by /u/conroe_au
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