Yes. It definitely has to be a dual-link DVI one.Does it matter what kind of DVI port?
Correct.But you think regular Display Port-to-mini Display Port cable should be able to work, with a monitor that is in otherwise good working order? Am I reading you right?
This is only necessary if the GPU only has DP and the monitor only has dual-link DVI. @OP - you don't need one of these!was using a Dell 30” 2560x1600 and a Asus 27” 2560x1440 on my Mac Pro 5,1 with the 5770 GPU. I had to use two of these. One for each display. You can find a used one for less on eBay.
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