Amazon Fire TV (3rd Gen) vs Roku Ultra (4660)

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Fire TV (3rd Gen) compared with Ultra (4660)

	AmazonFire TV (3rd Gen)	RokuUltra (4660)
Overview
Released
Released	October 2017	October 2017
Video and audio
Resolution
Resolution	4K	4K
HDR
HDR	HDR10	HDR10
Dolby Atmos
Dolby Atmos	Yes	–
Video
Video	HEVC up to 3840 × 2160 at 60 fps, 35 Mbps, Main 10 Profile Level 5.1; H.264 up to 4K 30 fps or 1080p 60 fps; VP9 up to 4K 60 fps; HDCP 2.2	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 Atmos via Dolby Digital Plus for supported titles and compatible equipment; Dolby Digital, Dolby Digital Plus, AAC, FLAC, MP3, Vorbis, PCM and Opus input formats	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	Fire OS	Roku OS
Storage
Storage	8 GB	–
Chip details
Chip details	Amlogic S905Z; quad-core Cortex-A53 CPU up to 1.5 GHz; Mali-450 MP3 GPU; 32-bit applications	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 Clock speed unpublished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	2 GB RAM	1 GB (Roku's exact Bryan/4660X developer row)
Storage
Storage	Internal capacity includes operating software	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	Fire OS 6 based on Android 7.1 (API level 25); build model AFTN; Amazon confirms US shipping from 25 October 2017	Roku OS; apps and features vary by region and software version
Connections
Wi-Fi
Wi-Fi	Wi-Fi 5	Wi-Fi 5
Ethernet
Ethernet	No	Yes
Voice remote
Voice remote	Yes	Yes
Ports
Ports	Pendant housing with attached HDMI lead and Micro-USB power input; separate Ethernet adapter optional, no built-in socket or microSD slot	HDMI, Ethernet, microSD, USB media port and power input; no optical audio output
Wi-Fi and Bluetooth
Wi-Fi and Bluetooth	Dual-band 802.11a/b/g/n/ac with 2 × 2 MIMO; Bluetooth 4.2 with BLE; Miracast not supported according to Amazon’s developer specifications	802.11ac dual-band MIMO (Roku's original 4660 comparison chart)
Remote
Remote	First-generation Alexa Voice Remote with microphone; no television volume controls. Hands-free control requires a linked compatible Echo; availability differed by region at launch.	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	External mains supply; cannot be powered from the television’s USB port according to Stuff’s exact-model inspection	–