This Extra Slim (XS) v2.2 board provides 32MB of SDR SDRAM memory for cores requiring a ( 512KB) of memory. Although the DE10-Nano has built in DDR3 RAM, it has a high latency and is not suitable for the timings required of retro EDO DRAM. So if a core requires precise memory timings, then the onboard DDR3 cannot be used.All my Extra Slim (XS) SDRAM boards have been checked under a microscope to no solder bridges are , then each board is tested at 150Mhz for at least half an hour. one of my boards uses the higher quality Winbond chips, high quality capacitors are used on each board.You can be confident knowing each Extra Slim (XS) v2.2 SDRAM board has been tested for over half an hour at 150MHz using the SDRAM Board Test Service Core . I also test each with a number of console cores in games to no issues are . Suitable For Terasic DE10-Nano FPGA Board Winbond W9825G6KH-6 Chip High Quality Capacitors Tested For Over Half An Hour @ 150MHz for MiSTer IO Board Compatible Fully Assembled & Tested The appearance and color of products from different batches , which does not affect their use Colour:blue Material:PCB Package Contents: 1 x SDRAM Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.