![]() Once the mac is started, if I change the monitor to the DP1.2 version, all the resolutions appear without the "low resolution", and if I select 2560x1440 it looks much better than with the DP1.1 version, 2560x1440 low resolution. ![]() If I choose 2560x1440 (low resolution), it seems to lose definition. īesides, if I click "alt" + select "scaled", I see other resolutions, but it always says "(low resolution)". I can't select for example 2560x1440 at 60hz, just these 4 resolutions at 30hz. The problem is that if I select the DP1.1 version on the monitor, the mac boots, but I can only select these screen resolutions: If I select 1.2 or 1.4 the mac does not boot, I have read that the HD 7950 card does not support versions higher than DP1.1. On the monitor, I can change the version of the displayport connector 1.1, 1.2 or 1.4. When I connect it with the Mini displayport to displayport cable, the screen goes black and the mac does not start. I have bought a new LG 27UL650 4K monitor. Until now I had it connected to a 27-inch, 2K AOC monitor, and everything works perfect at 2560x1440 60Hz. I have a mac pro 5.1 from 2010 (2x2.40, 64 gb ram, Mojave in a ssd), with a Sapphire HD 7950 3 gb mac edition graphics card.
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