Is 560x not enough to play it on medium settings?

I have set to medium preset on 1650x1080 resolution (windowed fullscreen), i have ~40+ fps in a team fights on sky temple / braxxis holdout, i remember when i was on Mojave 10.14.6, there was a metal patch, and everything seemed to work well, but on Catalina, it feels like OpenGL again… Did blizzard changed something for Catalina?

I’m playing this game on my 2nd office iMac 21.5 Radeon pro 560 X on 4K resolution with ultra settings and everything seems fine by me

What resolution / preset? I assume 4K imac’s 560x is the same as in MBP PRO 15" 2019?

4K résolution
However it ran out of video ram after a while so I just switch back to 2560*1400

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