MiSTer With No IO Board? HDMI Saves $$$
If all you want is HDMI, you don't need the IO add-on board. Just print a 3D fan mount, buy SDRAM, and you'll have a full setup that runs every core. 

3D Fan Mount (DE10_Center_Y_Axis_Both_IO-) https://thingiverse.com/thing:3184154

Dupont Cable: https://amazon.com/dp/B077N643L7/

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