Roku Ultra 4800X Spec Detail Code name / generation Benjamin / Benjamin-W CPU ARM Cortex A55 Graphics API OpenGL ES 2.0 RAM 2 GB Maximum UI resolution 1080p (1920×1080) Maximum playback resolution 4K @ 60 fps HDR support HDR10 / HDR10+ / HLG / Dolby Vision Audio / Dolby support Supports Dolby Atmos and System Sound Mixing (MS12) for Benjamin / 4800X models. Video codec support (USB & streaming) H.264/AVC, H.265/HEVC, VP9.2, AV1, etc. Wireless / network (Depending on variant / generation) — Roku’s newer Ultra models support 802.11ax Wi-Fi 6; earlier iterations may use 802.11ac or dual-band MIMO. Ports HDMI, USB (for media playback), Ethernet (10/100) Power consumption / input Approx ~4.5 W when streaming 4K; power input 12V, 1.5A Physical / included items Remote with headphone jack (private listening), power adapter, high-speed HDMI cable