sapphire nitro vega 64 fans not spinning

I just get an occasional, brief fan burst here and there. With the Nitro+ Vega 64 secondary BIOS flash, the fan is off at rest. Radeon 5770 (for boot screen), Vega 64 sapphire RX Processor 2 x 3.33 GHz 6-Core Intel Xeon, 32GB RAM I just got my Vega 64 Sapphire RX working with the BIOS flash instructions above. IMHO a reference design card is the best MacPro Vega solution, since it is more compact than others, and the fans seems to work as expected after flashing. I found the info written there on flashing to be confusing. Slot 3 Ableconn PU31-1A1C USB 3.1 Gen 2 (10 Gbps) Type-C) Slot 2 OWC Accelsior S PCIe + WD Blue 1TB Internal SSD Solid State Drive - SATA Boot drive. Slot 1 SAPPHIRE Radeon RX Vega 64 connected via DVI-D to Dell UltraSharp U2412M and a Wacom Cintiq 22HD via HDMI Got it on sale on BlackFriday NewEgg/Ebay sale for $339.99. It totally fits, being the same length and slightly narrower than my MSI RX 580 card.

The card is the reference design, occupies only two slots and when installed in slot #1, slot #2 is still available. #6 The 'BLUE Logo light option' seems to not work in OSX, only Windows? In OSX it is RED. #3 I have not had any need so far to run a H.265 video or sleep to trigger the fans to slow down. #2 The fans spin up under load, such as in LuxMark and slow down and go back to idle (0 RPM) after LuxMark is completed and some time has passed. #1 Fans run fast pre post at boot up, then slow down and stop (0 RPM) when at idle, not under load. With the Nitro Secondary Bios fans run as expected: The card is powered by the Mac Pro Pixlas Mod.

The flashing process I used is demonstrated in THIS VIDEO the card was installed in a Dell PC with Win 7 Pro running. Replaced my MSI Radeon RX 580 with a SAPPHIRE Radeon RX Vega 64 after I flashed the Vega 64 with the Sapphire Nitro+ RX Vega 64 (standard PCB): SECONDARY Bios 113-D0500110-S01.

Sapphire nitro vega 64 fans not spinning