Roku Ultra (2024) vs Roku Ultra (4640)

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Ultra (2024) compared with Ultra (4640)

	RokuUltra (2024)	RokuUltra (4640)
Overview
Released
Released	September 2024	October 2016
Video and audio
Resolution
Resolution	4K	4K
HDR
HDR	Dolby Vision, HDR10+, HDR10 and HLG (better)	HDR10
Dolby Atmos
Dolby Atmos	Yes	–
Video
Video	Up to 2160p at 60 fps (3840 × 2160) with up-scaling from 720p and 1080p; HDMI Quick Media Switching (QMS); AV1, HEVC, H.264 and VP9 from USB	Up to 4K at 60 fps; HDCP 2.2; upscales 720p and 1080p sources to 4K (Roku launch release reproduced by Display Daily)
HDR
HDR	Dolby Vision at 60 fps, HDR10, HDR10+ and HLG	HDR10 (Roku's exact Cooper/4640X developer row); Dolby Vision is not supported
Audio
Audio	Dolby Atmos decode via HDMI; DTS Digital Surround pass-through; AC-4 and DD+ with Atmos, FLAC, ALAC and other formats from USB	Dolby Digital and Dolby Digital Plus decoding; optical digital audio output for compatible receivers and soundbars (Roku launch release)
Performance
Software
Software	Roku OS	Roku OS
Chip details
Chip details	Quad-core Arm Cortex-A55; Roku quotes over 30% faster than other Roku players	Arm Cortex-A53 quad-core 1.2 GHz; OpenGL ES 2.0 (Roku's Cooper/4640X developer row)
Memory
Memory	2 GB	1 GB (Roku's exact Cooper/4640X developer row)
Storage
Storage	–	MicroSD slot provides additional channel storage; USB is for local media playback (Roku launch release). No verified built-in user storage capacity
Software and services
Software and services	–	Roku OS; apps and features vary by region and software version
Connections
Wi-Fi
Wi-Fi	Wi-Fi 6	Wi-Fi 5
Ethernet
Ethernet	Yes	Yes
Voice remote
Voice remote	Yes	Yes
Ports
Ports	HDMI 2.1b; USB 3.0; 10/100 Ethernet; power	HDMI, Ethernet, optical digital audio output, USB media playback port, microSD slot and power input
Wi-Fi and Bluetooth
Wi-Fi and Bluetooth	802.11ax dual-band MIMO Wi-Fi 6 (2.4 GHz and 5 GHz); Bluetooth audio streaming	Dual-band 802.11ac MIMO (Roku launch release)
Smart home
Smart home	Works with Roku Smart Home, Apple AirPlay and HomeKit, Google Home and Alexa	–
Remote
Remote	Roku Voice Remote Pro (2nd edition) with hands-free voice, backlit buttons, TV power and volume, Quick Launch and Live TV Guide buttons, lost-remote finder; rechargeable over USB-C	Original point-anywhere remote has voice search, headphone jack, headphone volume, gaming buttons and lost-remote finder; no TV volume or power control (The Next Web)
Design
Type
Type	Box	Box
Power
Power	12 V, 1.5 A power adaptor; about 4.5 W when streaming 4K	–
Size
Size	124.4 × 127.0 × 25.4 mm; 167.2 g	4.9 × 4.9 × 0.9 in; fanless design (Tom's Guide)
In the box
In the box	Roku Ultra, Roku Voice Remote Pro (2nd edition), USB-C charging cable for the remote, Premium High Speed HDMI cable, power adaptor	–