This Extra Slim (XS-D) v2.5 card provides 128MB of SDR SDRAM memory for cores that require a large (>512KB) memory, including the Neo Geo core. Although the DE10-Nano has built-in DDR3 RAM for M, it has high latency and is not suitable for the timing required by retro EDO DRAM. So if a core requires precise memory timings, the built-in DDR3 cannot be used. Each of my cards uses high-quality Alliance memory. You can rest assured knowing that each 128MB SDRAM for the Extra Slim (XS-D) v2.5 card has been tested for over an hour at 140MHz. I have also tested each one with the Neo Geo console core, the Acorn Archimedes (Archie) core, the Game Boy Advance core, the Sega core, and in Neo Geo games that require a 128MB module to play, ensuring there are no issues. Features: ~ Suitable for Terasic DE10-Nano FPGA board ~ 128MB SDRAM capacity ~ Playable from the Neo Geo ROM library ~ Alliance Memory AS4C32M16SB-7TIN Chips ~ MiSTer IO board compatible ~ Fully assembled and tested Package Includes: - 1 x Extra Slim (XS-D) v2.5 SDRAM card