The AMD Radeon R5 is a solid-state drive in the 2.5" form factor. It is only available in the 256 GB capacity listed on this page. With the rest of the system, the AMD Radeon R5 interfaces using a SATA 6 Gbps connection. The SSD controller is the SM2259XT2 from Silicon Motion, a DRAM cache is not available. AMD has installed 112-layer TLC NAND flash on the Radeon R5, the flash chips are made by Kioxia. Please note that this SSD is sold in multiple variants with different NAND flash or controller, which could affect performance, the "Notes" section at the end of this page has more info. To improve write speeds, a cache is used, so bursts of incoming writes are handled more quickly. The cache is sized at 80 GB. Copying data out of the SLC cache (folding) completes at 90 MB/s. The Radeon R5 is rated for sequential read speeds of up to 535 MB/s and 450 MB/s write.
At its launch, the SSD was priced at 19 USD. AMD guarantees an endurance rating of 80 TBW, a very low value compared to other SSDs.