Roku Premiere (4620) vs Roku Ultra (4640)

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Premiere (4620) compared with Ultra (4640)

	RokuPremiere (4620)	RokuUltra (4640)
Overview
Released
Released	October 2016	October 2016
Video and audio
Resolution
Resolution	4K	4K
HDR
HDR	None	HDR10 (better)
Video
Video	4K UHD up to 60 fps; HDCP 2.2; upscales 720p/1080p to 4K and 720p to 1080p (Roku launch release reproduced by Display Daily)	Up to 4K at 60 fps; HDCP 2.2; upscales 720p and 1080p sources to 4K (Roku launch release reproduced by Display Daily)
HDR
HDR	No HDR in Roku's exact Cooper/4620X developer row and original launch release; distinct from the later HDR-capable Premiere with model number 3920	HDR10 (Roku's exact Cooper/4640X developer row); Dolby Vision is not supported
Audio
Audio	Night listening mode adjusts sound levels for consistent volume (Roku launch release)	Dolby Digital and Dolby Digital Plus decoding; optical digital audio output for compatible receivers and soundbars (Roku launch release)
Performance
Software
Software	Roku OS	Roku OS
Chip details
Chip details	Arm Cortex-A53 quad-core at 1.2 GHz; OpenGL ES 2.0 (Roku's exact Cooper/4620X developer row)	Arm Cortex-A53 quad-core 1.2 GHz; OpenGL ES 2.0 (Roku's Cooper/4640X developer row)
Memory
Memory	1 GB (Roku's exact Cooper/4620X developer row)	1 GB (Roku's exact Cooper/4640X developer row)
Storage
Storage	–	MicroSD slot provides additional channel storage; USB is for local media playback (Roku launch release). No verified built-in user storage capacity
Software and services
Software and services	Roku OS; apps and features vary by region and software version	Roku OS; apps and features vary by region and software version
Connections
Wi-Fi
Wi-Fi	Wi-Fi 5	Wi-Fi 5
Ethernet
Ethernet	No	Yes
Voice remote
Voice remote	No	Yes
Ports
Ports	HDMI output and power input only; no Ethernet or microSD card slot (The Gadgeteer)	HDMI, Ethernet, optical digital audio output, USB media playback port, microSD slot and power input
Wi-Fi and Bluetooth
Wi-Fi and Bluetooth	Dual-band 802.11ac MIMO (Roku launch release)	Dual-band 802.11ac MIMO (Roku launch release)
Remote
Remote	Original infrared remote with navigation, playback and app shortcuts; no microphone or headphone socket. Mobile-app voice search is separate	Original point-anywhere remote has voice search, headphone jack, headphone volume, gaming buttons and lost-remote finder; no TV volume or power control (The Next Web)
Design
Type
Type	Box	Box
Size
Size	Approximately 5-inch-square black box (The Gadgeteer); original box includes remote, two AAA batteries and power adapter	4.9 × 4.9 × 0.9 in; fanless design (Tom's Guide)