Roku Express 4K (3940) vs Roku XDS (2100)

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Express 4K (3940) compared with XDS (2100)

	RokuExpress 4K (3940)	RokuXDS (2100)
Overview
Released
Released	May 2021	September 2010
Video and audio
Resolution
Resolution	4K (better)	1080p
HDR
HDR	HDR10, HDR10+ and HLG (better)	None
Video
Video	Up to 4K at 60 fps (Roku's exact Marlin/3940X developer row); HDCP 2.2 required for 4K/HDR	Up to 1080p through HDMI; component supports 720p/480p and needs Roku's separately sold cable, while composite carries 480i (Missing Remote)
Audio
Audio	–	Stereo analogue audio; digital stereo or 5.1 passthrough through HDMI and optical, dependent on media and service (Missing Remote)
HDR
HDR	HDR10, HDR10+ and HLG (Roku's exact Marlin/3940X developer row); no Dolby Vision	–
Performance
Software
Software	Roku OS	Roku OS
Chip details
Chip details	Arm Cortex-A55; OpenGL ES 2.0 (Roku's exact Marlin/3940X developer row)	MIPS at 400 MHz in Roku's exact Pico/2100X developer row; Nexperia PNX8935E1 identified by SmallNetBuilder's teardown
Memory
Memory	1 GB (Roku's exact Marlin/3940X developer row)	256 MB in Roku's exact Pico/2100X developer row
Storage
Storage	Internal storage serves system/channel use; maker sources used do not publish user-accessible capacity	SmallNetBuilder identifies 256 MB physical flash, used for system software rather than published user storage. USB playback was unfinished at launch; official availability was postponed from November to January 2011 in Missing Remote's December test
Software and services
Software and services	Launched with Roku OS 10. App availability varies by region and software version. May 2021 on-sale month is from the exact UK Tech Advisor review; the maker developer table gives only 2021. Cord Busters identifies this model as the UK replacement for Premiere 3920	Roku lists OS 3.1 as the last compatible version for 2100X. Its current developer table labels this row XD, while the exact-model contemporary reviews identify 2100X as XDS. Channels and service support vary with region and software
Connections
Wi-Fi
Wi-Fi	Wi-Fi 5	Wi-Fi 4
Ethernet
Ethernet	No	Yes
Voice remote
Voice remote	No	No
Ports
Ports	HDMI output, micro-USB power/compatible Ethernet adaptor connection and reset. No built-in Ethernet socket; USB Ethernet adaptor sold separately	HDMI, component video connector, composite video and stereo RCA audio, optical digital audio, 10/100 Ethernet, USB 2.0 media port and power (Missing Remote)
Wi-Fi and Bluetooth
Wi-Fi and Bluetooth	Dual-band 802.11ac Wi-Fi (Tech Advisor)	Dual-band 802.11n, compatible with b/g; 2.4 and 5 GHz networks independently verified by SmallNetBuilder
Remote
Remote	Original standard infrared remote with channel shortcuts; no microphone, television power/volume controls or headphone socket. Express 4K+ 3941 includes the voice remote instead	Original infrared Enhanced remote with Back, Options and Instant Replay; no microphone, headphone socket or television controls
Design
Type
Type	Box	Box
Size
Size	–	4.9 × 4.9 × 1.2 inches, width × depth × height (Missing Remote)
Power
Power	USB power cable and mains adaptor supplied; use the adaptor if the television USB port provides insufficient power	–
In the box
In the box	Player, infrared remote, batteries, premium high-speed HDMI cable, USB power cable, power adaptor and removable adhesive strip	Player, infrared remote, two AAA batteries, composite/stereo cable and mains power adaptor. HDMI and component cables sold separately (Missing Remote and SmallNetBuilder)