Amazon Fire TV Stick 4K Max (2nd Gen) vs Roku Express 4K (3940)

Every spec side by side, from each maker's published figures.

Only show differences

Better figure, where one is clearly better

Share comparison

Fire TV Stick 4K Max (2nd Gen) compared with Express 4K (3940)

	AmazonFire TV Stick 4K Max (2nd Gen)	RokuExpress 4K (3940)
Overview
Released
Released	October 2023	May 2021
Video and audio
Resolution
Resolution	4K	4K
HDR
HDR	Dolby Vision, HDR10+, HDR10 and HLG (better)	HDR10, HDR10+ and HLG
Dolby Atmos
Dolby Atmos	Yes	–
Video
Video	2160p, 1080p and 720p up to 60 fps; AV1, HEVC, H.264 and VP9 hardware decoding up to 4K at 60 fps; Auto Low Latency Mode	Up to 4K at 60 fps (Roku's exact Marlin/3940X developer row); HDCP 2.2 required for 4K/HDR
HDR
HDR	Dolby Vision (profiles 4-MEL, 5, 8, 9 and 10), HDR10, HDR10+ and HLG	HDR10, HDR10+ and HLG (Roku's exact Marlin/3940X developer row); no Dolby Vision
Audio
Audio	Dolby Atmos, 7.1 surround and stereo; Dolby MAT transcoding; Dolby TrueHD, DTS, DTS-HD (basic profile) and MPEG-H pass-through	–
Performance
Software
Software	Fire OS	Roku OS
Storage
Storage	16 GB	–
Chip details
Chip details	MediaTek MT8696T; 4× Arm Cortex-A55 up to 2.0 GHz; GE9215 GPU up to 850 MHz	Arm Cortex-A55; OpenGL ES 2.0 (Roku's exact Marlin/3940X developer row)
Memory
Memory	2GB LPDDR4	1 GB (Roku's exact Marlin/3940X developer row)
Storage
Storage	–	Internal storage serves system/channel use; maker sources used do not publish user-accessible capacity
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
Connections
Wi-Fi
Wi-Fi	Wi-Fi 6E	Wi-Fi 5
Ethernet
Ethernet	No	No
Voice remote
Voice remote	Yes	No
Ports
Ports	HDMI 2.1 output with ARC input support; micro-USB for power; 10/100 Ethernet with Amazon's adapter (sold separately)	HDMI output, micro-USB power/compatible Ethernet adaptor connection and reset. No built-in Ethernet socket; USB Ethernet adaptor sold separately
Wi-Fi and Bluetooth
Wi-Fi and Bluetooth	Wi-Fi 6E tri-band 802.11a/b/g/n/ac/ax (2.4, 5 and 6 GHz); Bluetooth 5.2 and BLE	Dual-band 802.11ac Wi-Fi (Tech Advisor)
Smart home
Smart home	Alexa control of compatible smart home devices; Live View Picture-in-Picture camera feeds	–
Remote
Remote	Alexa Voice Remote Enhanced with power, volume and channel buttons for TVs, soundbars and receivers (IR); Bluetooth; 2 × AAA; 38 × 157 × 17 mm, 51 g without batteries	Original standard infrared remote with channel shortcuts; no microphone, television power/volume controls or headphone socket. Express 4K+ 3941 includes the voice remote instead
Design
Type
Type	Stick	Box
Power
Power	–	USB power cable and mains adaptor supplied; use the adaptor if the television USB port provides insufficient power
Size
Size	99 × 30 × 14 mm (108 mm with the HDMI connector); 43.5 g	–
In the box
In the box	Fire TV Stick 4K Max, Alexa Voice Remote Enhanced, power cable and power adapter, HDMI extender cable, 2 AAA batteries, quick start guide	Player, infrared remote, batteries, premium high-speed HDMI cable, USB power cable, power adaptor and removable adhesive strip