0 Replies Latest reply on Nov 18, 2015 4:52 PM by sstead

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


      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