SDRAM XS-D v2.5 board for Mister FPGA This Extra Slim (XS-D) v2.5 board provides 128MB of SDR SDRAM memory for cores requiring a ( 512KB) of memory including the core. 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.Every one of my boards uses the high memory paired . You can be confident knowing each 128MB SDRAM Extra Slim (XS-D) v2.5 board has been tested for over an hour at 140 MHz . I have also tested each with the console core, Archimedes () core, Advance core, for core and in games which require a 128MB module to play this ensures no issues are present. Suitable For Terasic DE10-Nano FPGA Board 128MB SDRAM Capacity 100% Of The ROM Library Playable Alliance Memory AS4C32M16SB-7TIN Chips 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.