Roku Premiere (3920) vs Roku Ultra (4660)

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Premiere (3920) compared with Ultra (4660)

	RokuPremiere (3920)	RokuUltra (4660)
Overview
Released
Released	October 2018	October 2017
Video and audio
Resolution
Resolution	4K	4K
HDR
HDR	HDR10	HDR10
Video
Video	720p, 1080p and 4K Ultra HD; up to 4K at 60 fps (Roku's exact Gilbert 4K/3920X developer row). HDCP 2.2 required for 4K/HDR	HD, 4K and 4K HDR at up to 60 fps; protected 4K requires HDCP 2.2 (Roku launch release and original 4660 comparison chart)
HDR
HDR	HDR10 in Roku's exact developer row; the 2019 UK reviews report no Dolby Vision, HDR10+ or HLG	HDR10 (Roku's exact Bryan/4660X developer row); no Dolby Vision in the original 4660 comparison chart
Audio
Audio	–	Dolby Audio and DTS passthrough over HDMI; night listening mode (Roku's original 4660 comparison chart). Optical output removed from the previous 4640 model
Performance
Software
Software	Roku OS	Roku OS
Chip details
Chip details	Quad-core processor (Roku announcement); Arm Cortex-A53 and OpenGL ES 2.0 (exact maker developer row)	Arm Cortex-A53; OpenGL ES 2.0 (Roku's exact Bryan/4660X developer row); quad-core confirmed by the original 4660 comparison chart. Clock speed unpublished
Memory
Memory	1 GB (Roku's exact Gilbert 4K/3920X developer row)	1 GB (Roku's exact Bryan/4660X developer row)
Storage
Storage	–	microSD adds channel storage and can improve channel loading; not local media playback. Use the USB media port for supported local files
Software and services
Software and services	Roku OS; app availability varies by region and software version. US retail availability began in early October 2018; the developer row lists 2019, while the original US maker announcement specifies October 2018	Roku OS; apps and features vary by region and software version
Connections
Wi-Fi
Wi-Fi	Wi-Fi 4	Wi-Fi 5
Ethernet
Ethernet	No	Yes
Voice remote
Voice remote	No	Yes
Ports
Ports	HDMI output, micro-USB power and reset; no Ethernet, USB media or memory-card slot	HDMI, Ethernet, microSD, USB media port and power input; no optical audio output
Wi-Fi and Bluetooth
Wi-Fi and Bluetooth	Single-band 802.11b/g/n; no 5 GHz support (Tech Advisor)	802.11ac dual-band MIMO (Roku's original 4660 comparison chart)
Remote
Remote	Standard infrared remote with channel shortcuts; no microphone, television power/volume controls or headphone socket. Premiere+ 3921 was the voice-remote bundle	Original voice remote with television power and volume buttons, headphone socket, gaming buttons and lost-remote finder. Television controls require a compatible television; no later personal shortcut buttons
Design
Type
Type	Box	Box
Size
Size	–	Approximately 5-inch-square box (Tom's Guide)
Power
Power	USB power cable and mains adaptor; maker recommends the adaptor if the television's USB port supplies insufficient power	–
In the box
In the box	Player, infrared remote, two AAA batteries, HDMI cable, USB power cable, power adaptor and removable adhesive strip (UK quick-start guide)	–