SDRAM XS-D v2.5 board for Mister FPGAThis 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. 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 CD core and in games which require a 128MB module to play this ensures no issues are .Suitable For Terasic DE10-Nano FPGA Board128MB SDRAM Capacity100% Of The ROM Library Playable Memory AS4C32M16SB-7TIN Chipsfor MiSTer IO Board CompatibleFully Assembled & TestedThe appearance and color of products from different batches , which does not affect their useColour:blueMaterial:PCBPackage Contents:1 x SDRAMOnly 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.