So I have a few cheap 3.5 tfts that you can find online for around $15. I use the instructions here to get it working for retropie:
Now the performance on my raspberry pi 3b with this LCD panel is fairly good. Not as good as adafruits, but unbeatable for the money. The issue is when I install it on my raspberry pi zero w. The frame rates are terrible and practically unplayable on gba games. Oddly enough there is no lag or issue at all when I use the HDMI output on the zero.
I'm wondering if maybe there are some settings I can adjust, or, why is there better peformance on the pi 3b? I'm completely aware of the hardware differences. I mean specifically? Is it the CPU? RAM? power? GPIO?
Is there anything I can do to hack around this?
Thanks for all and any insight. I'm just learning on the Pi and wasn't able to find any answers to this specific issue (zero w + cheap 3.5 tft + retropie).