Amazon Fire TV Cube (3rd Gen) vs Roku Express 4K (3940)

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Fire TV Cube (3rd Gen) compared with Express 4K (3940)

	AmazonFire TV Cube (3rd Gen)	RokuExpress 4K (3940)
Overview
Released
Released	October 2022	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, for output and HDMI input; AV1 and HEVC decoding up to 4K at 60 fps; Super Resolution Upscaling from HD to 4K	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, including for HDMI input; Dolby TrueHD, DTS, DTS-HD (basic profile) and MPEG-H pass-through; built-in 11 W speaker	–
Performance
Software
Software	Fire OS	Roku OS
Storage
Storage	16 GB	–
Chip details
Chip details	Amlogic POP1-G; 4× Arm Cortex-A73 at 2.2 GHz and 4× Cortex-A53 at 2.0 GHz; Arm G52 MP8 GPU at 800 MHz	Arm Cortex-A55; OpenGL ES 2.0 (Roku's exact Marlin/3940X developer row)
Memory
Memory	2GB LPDDR4/4X	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Storage	–	Internal storage serves system/channel use; maker sources used do not publish user-accessible capacity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	Yes	No
Voice remote
Voice remote	Yes	No
Ports
Ports	HDMI 2.1 input; HDMI 2.1 output with ARC; HDCP 2.3; USB-A 2.0 (for webcams); IR extender; 10/100 Ethernet; power	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 with 2x2 MIMO (2.4, 5 and 6 GHz); Bluetooth 5.0 and LE	Dual-band 802.11ac Wi-Fi (Tech Advisor)
Smart home
Smart home	Hands-free Alexa with a four-microphone array; controls TVs, soundbars, cable and satellite boxes and receivers by voice and IR; Alexa video calling with a USB webcam	–
Remote
Remote	Alexa Voice Remote Enhanced; Bluetooth 5.0; 2 × AAA; 38 × 158 × 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	Box	Box
Power
Power	External power adapter	USB power cable and mains adaptor supplied; use the adaptor if the television USB port provides insufficient power
Size
Size	86 × 86 × 77 mm; 513 g	–
In the box
In the box	Fire TV Cube (3rd Gen), Alexa Voice Remote Enhanced, power adapter, 2 AAA batteries, quick start guide (HDMI, IR extender and Ethernet cables sold separately)	Player, infrared remote, batteries, premium high-speed HDMI cable, USB power cable, power adaptor and removable adhesive strip