limit is based on size and power supply

radeon 5450 2 gig card is recommendation

https://www.youtube.com/watch?v=N8QocY3R7BM

Max Board Power: 19.4 Watts

https://www.visiontek.com/visiontek-radeontm-5450-2gb-ddr3-dvi-i-hdmi-vga.html

Max Board Power: 39.6 Watts

Best card is gt1030

https://www.dell.com/en-us/work/shop/msi-gt-1030-2g-lp-oc-graphic-card-2-gb-gddr5-pcie-30-x16-low-profile-hdmi-displayport/apd/aa362018/graphic-video-cards