Rarity, rarity: I am offering two of the first computer graphics cards of the time from the company “Prima Graphics”. A "MASTER" card and a "SLAVE" card on Siemens PC 612 B1300 C-960 boards. Includes 2 adapters. HELLO, Honestly, I've never seen cards like this before. In any case, they are cards with VME bus, a standard used in the 80s/90s/2000s. Specifically, the date code of the CHIPS on the card indicates that they should be from 1995. The manufacturing company was Prima Graphics, now defunct, which manufactured computer graphics systems. I imagine that these two cards, a MASTER and a SLAVE card, provided great processing power for advanced graphics for the time. During these years, the first commercial graphics cards such as VGA appeared on computers. In the professional sector, such as broadcasting, engineering, and even military use, VME bus-based mainframe systems featured advanced graphics cards supplied by many companies. All of those black vertical chips are RAM memory, these two cards probably had more RAM memory than any commercial home computer of the time. I imagine they cost the same as an apartment in 1995. The Bt brand chips come from the now defunct Brooktree company, which you can download here: http://www.rsp-italy.it/Electronics/Databooks/Brooktree/_contents/Brooktree%20Product%20Databook% 201991. pdf I have owned this card for over 25 years as a collector and have always kept it safe, so both cards are in mint condition and fully functional. Please see my product images for the technical data and visual condition. I create my pictures to the best of my ability, but if you have any questions, please do not hesitate to contact me. You are also welcome to view the article on site. You are bidding on 2 cards