Main features for both models include:
* Eight HDMI® 1.4a inputs, with compatibility specified for an Audio Return Channel and 3D video, and support for both mandatory video formats for 3D broadcasting ("Side-By-Side (Half)" and "Top-and-Bottom")
* Dual HDMI outputs, allowing users to connect two high-definition displays simultaneously.
* HQV-Reon VX video processor
* 1080p upscaling of all video inputs, regardless of source resolution
* Advanced ISF video calibration, which allows users to make fine-grained, independent adjustments for each video source.
* Audio networking
* Internet radio
* Rear-side Ethernet port for firmware upgrades and direct connection to the internet or to a home PC. Users can access streaming internet radio through Pandora, Rhapsody, Napster, Slacker, Sirius Internet Radio, and vTuner, or play back a wide variety of PC-based audio files, including FLAC, MP3, WAV, Ogg Vorbis, WMA, WMA Lossless, AAC, and LPCM.
* Windows 7 compatible
* DLNA 1.5 certified
* 9.2 audio channels
* Audyssey DSX (adds extra height or width channels for greater spatial ambience) and Dolby Pro Logic (provides the option of extra height channels)
* Dolby TrueHD and DTS-HD Master Audio
* Compatibility with DSD Direct
* Burr-Brown DACs
* Audyssey room-correction and equalization
* Flexibility in multi-room set-ups: the TX-NR5008 and TX-NR3008 let users play a 5.1-channel source in the main room, along with fully powered stereo audio of two different sources in Zone 2 and Zone 3. On top of that, users also have the option of Zone 2/3 pre outs and Zone 2 video output.
* Music playback and album art display from USB port
* Gold-plated audio inputs
* PLL jitter-cleaning circuit technology on all models
* Separate transformers for audio and video processing
* Analog RGB input for video content from a connected PC
* Backlit and customizable remote controller
* HDMI Thru: allows children to still watch programs when the receiver is not turned on
* Onkyo's new overlaid graphical OSD for seamless adjustment of settings during a viewing session
The TX-NR5008 adds a second USB port at the rear, and a "massive" toroidal transformer and 22,000 ìF capacitors.