AnsweredAssumed Answered

mac 7950 and Dell UP3216Q 4k causes no boot for Mac

Question asked by sstead on Nov 18, 2015

I have a mac pro 2010, with a Radeon 7950 Mac version display card.

It is currently driving dual Dell 30" displays 3007WFHPC and working well.

I just purchased a 4k Dell UP3216Q to replace one of displays. when I connect it via the miniDP port, the mac will not boot at all.

If I disconnect the new Dell 4k, and restart the Mac it boots.

Clearly there is an issue with SST/MST on the new display. The 4k display is DP1.2.

Is there a firmware update for the 7950? The following is the Hardware info on the Radeon:


Chipset Model:            AMD Radeon HD 7950

  Type: GPU

  Bus:   PCIe

  Slot:   Slot-1

  PCIe Lane Width:      x16

  VRAM (Total):           3072 MB

  Vendor:         ATI (0x1002)

  Device ID:      0x679a

  Revision ID:   0x0000

  ROM Revision:          113-E2080C-101

  EFI Driver Version:    01.00.624


Thank you