I’ve had my Mac Pro 2013 (aka ‘Trashcan’ Mac) for a few months now, and while I didn’t buy it for any specific purpose, there was an odd sluggishness that I couldn’t put my finger on, compared to the performance of my much older 2008 Mac Pro 3,1.
I didn’t have any Thunderbolt display cables so was initially using an HDMI cable into my 4k monitor, which rather surprising I thought for a 2013 machine only supported 30khz refresh rates. I didn’t think too much of it, but eventually got a Thunderbolt to DisplayPort cable, and now the screen is at 60khz everything my usage is noticeably smoother. It’s odd that it would make this make difference, but the jankiness of the slightly laggy screen updates when dragging around or resizing windows really made a massive difference in how I perceived the performance of the machine.