As Expert is just a brand, the chip on that card is likely used on other cards, too. I suspect that your EGA card has a Gemini VC-001 chip, like those on https://www.vgamuseum.info/index.php/cpu/item … 7-gemini-vc-001 . The reason is that your card has the bare minimum of chips: A BIOS ROM, 8 RAM chips to provide 32-bit memory, a fully integrated EGA chip and a digital amplifier chip for the monitor output. Furthermore, it is named 480, which indicates the card is able to produce 640 x 480 pixels at a frequency supported by some monitor (but don't ask which frequency exactly - VGA did not yet set a standard, so it isn't necessarily 31.5kHz/60Hz).

Googling for images of EGA 480 only brought up the Gemini cards as true single-chip EGA cards. Furthermore, the name "GEGA" makes sense for "Gemini EGA". Granted, it would also make sense for "Genoa EGA", and Genoa was a big player in the EGA business, but all Genoa cards I could find are dual-chip solutions.

mkarcher wrote on 2025-10-25, 20:49:

As Expert is just a brand, the chip on that card is likely used on other cards, too. I suspect that your EGA card has a Gemini VC-001 chip, like those on https://www.vgamuseum.info/index.php/cpu/item … 7-gemini-vc-001 . The reason is that your card has the bare minimum of chips: A BIOS ROM, 8 RAM chips to provide 32-bit memory, a fully integrated EGA chip and a digital amplifier chip for the monitor output. Furthermore, it is named 480, which indicates the card is able to produce 640 x 480 pixels at a frequency supported by some monitor (but don't ask which frequency exactly - VGA did not yet set a standard, so it isn't necessarily 31.5kHz/60Hz).

Googling for images of EGA 480 only brought up the Gemini cards as true single-chip EGA cards. Furthermore, the name "GEGA" makes sense for "Gemini EGA". Granted, it would also make sense for "Genoa EGA", and Genoa was a big player in the EGA business, but all Genoa cards I could find are dual-chip solutions.

This is super helpful. I couldn't find the other photo I ran across earlier but did find this which is the same board without the chip sticker: https://retro-pc.ucoz.ru/index/gega_480/0-950

The chip isn't labeled VC-001 but appear to equivalent: https://theretroweb.com/chips/6386

So now that I might assume it uses a VC-001 this finds all kind of information!