Amazon Fire TV Cube (1st Gen) vs Roku Ultra (4660)

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Fire TV Cube (1st Gen) compared with Ultra (4660)

	AmazonFire TV Cube (1st Gen)	RokuUltra (4660)
Overview
Released
Released	June 2018	October 2017
Video and audio
Resolution
Resolution	4K	4K
HDR
HDR	HDR10	HDR10
Dolby Atmos
Dolby Atmos	Yes	–
Video
Video	HEVC hardware decoding up to 3840 × 2160 at 60 fps; H.264 up to 4K 30 fps or 1080p 60 fps; VP9 up to 4K 60 fps with limitations	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; Dolby Vision and HDR10+ are not listed for this generation	HDR10 (Roku's exact Bryan/4660X developer row); no Dolby Vision in the original 4660 comparison chart
Audio
Audio	Dolby Atmos over Dolby Digital Plus for compatible equipment and supported titles; Dolby Digital and Dolby Digital Plus; built-in speaker for Alexa responses	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	16 GB	–
Chip details
Chip details	Amlogic S905Z; quad-core Arm Cortex-A53 up to 1.5 GHz; Mali-450 MP3 GPU; 32-bit application support	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 Clock speed unpublished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; memory type not specified by Amazon’s developer table	1 GB (Roku's exact Bryan/4660X developer row)
Storage
Storage	16 GB internal storage; operating software occupies part of it	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); developer build model AFTA	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	HDMI output, Micro-USB, IR extender and power connections; no built-in Ethernet socket. Ethernet is supported through the included USB-connected adapter.	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	802.11ac dual-band MIMO (Roku's original 4660 comparison chart)
Smart home
Smart home	Eight far-field microphones and beamforming; Alexa controls compatible televisions, soundbars, receivers and cable boxes through infrared, HDMI CEC and supported cloud protocols	–
Remote
Remote	First-generation Alexa Voice Remote included; voice microphone button and navigation controls	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 power supply	–
In the box
In the box	Fire TV Cube, Alexa Voice Remote, batteries, power supply, Ethernet adapter and IR extender; HDMI cable not included	–