Powered by AMD RDNA 2 Radeon RX 6400 Integrated with 4GB GDDR6 64-bit memory interface Low profile design PCIe 4.0 1x HDMI 2.1 1x DisplayPort 1.4. GIGABYTE Radeon RX 6400 D6 Low Profile 4G graphics card delivers high frame rates. Get the ultimate gaming experience with powerful new compute units, and up to 4GB of dedicated GDDR6 memory. When paired with an AMD Ryzen Series desktop processor, AMD Smart Access Memory technology offers new levels of gaming performance.