Roku Express (3930) vs Roku Ultra (4660)

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Express (3930) compared with Ultra (4660)

	RokuExpress (3930)	RokuUltra (4660)
Overview
Released
Released	October 2019	October 2017
Video and audio
Resolution
Resolution	1080p	4K (better)
HDR
HDR	None	HDR10 (better)
Video
Video	Up to 1080p Full HD; no 4K or HDR (exact Nemo/3930X maker developer row)	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 (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	Arm Cortex-A53; OpenGL ES 2.0 (Roku's exact Nemo/3930X 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 Clock speed unpublished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	512 MB (Roku's exact Nemo/3930X 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; apps vary by region and software version. Maker September 2019 release gives October retail availability, rather than the announcement day	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 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 Wi-Fi (Tech Advisor)	802.11ac dual-band MIMO (Roku's original 4660 comparison chart)
Remote
Remote	Standard infrared remote with channel shortcuts; needs line of sight. No voice microphone, television power/volume controls or headphone socket. Express+ 3931 adds 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. The European 3930EU guide excludes a mains adaptor; the original US launch package includes one	–
In the box
In the box	European package includes player, infrared remote, two AAA batteries, HDMI cable, USB power cable and removable adhesive strip	–