Samsung UHD MU6400 vs Samsung UHD NU7400

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UHD MU6400 compared with UHD NU7400

	SamsungUHD MU6400	SamsungUHD NU7400
Overview
Released
Released	March 2017	March 2018
Display
Panel
Panel	LED LCD	LED LCD
Panel detail
Panel detail	Flat LED-backlit LCD. FWD found a PLS panel in its 55-inch European review sample; that panel subtype is not assigned across other sizes.	Flat LED-backlit LCD. Samsung's investor report lists UHD 60 Hz; no panel subtype is assigned without exact-size maker evidence.
Resolution
Resolution	3840 × 2160 (4K)	3840 × 2160 (4K)
Refresh rate
Refresh rate	–	60 Hz
HDR formats
HDR formats	HDR10, HLG, HDR10+	HDR10, HDR10+, HLG
Peak brightness
Peak brightness	FWD measured 307 nits on its 55-inch European sample; no maker peak-brightness figure is assigned.	–
Picture processing
Picture processing	Active Crystal Colour, UHD Dimming, Contrast Enhancer and Auto Motion Plus. Samsung's PQI 1500 is a processing label rather than native Hz; unpublished native refresh is omitted.	Dynamic Crystal Colour, UHD Dimming, Contrast Enhancer and Auto Motion Plus. PQI 1700 is a processing label; 60 Hz is separately documented in the maker investor report.
Sizes
Sizes
Sizes	40, 49, 55, 65″	43, 50, 55, 65″
Largest size
Largest size	65″	65″
Gaming
HDMI ports
HDMI ports	3 (0 HDMI 2.1 at 4K 120 Hz+)	3 (0 HDMI 2.1 at 4K 120 Hz+)
Variable refresh rate
Variable refresh rate	None	None
Auto low latency mode
Auto low latency mode	No	–
HDMI detail
HDMI detail	Three HDMI inputs with ARC and HDMI-CEC; component/shared composite inputs also provided.	Three HDMI inputs with ARC and HDMI-CEC, plus component and shared composite inputs.
Input lag
Input lag	21.3 ms in Game Mode on the 40-inch What Hi-Fi? sample; 17.7 ms in Game Mode and 91.1 ms in Film Mode on the 55-inch FWD sample.	–
Game features
Game features	Manual Game Mode; no variable refresh or automatic low-latency switching.	Samsung specifies Auto Game Mode; the checked UK table does not identify the HDMI ALLM signalling mechanism, so that optional field is left unassigned.
Smart TV and sound
Smart TV platform
Smart TV platform	Tizen	Tizen
Processor
Processor	UHD Up-Scaling picture engine; quad-core smart processor	UHD Engine; quad-core smart processor
Speakers
Speakers	20 W, 2.0 channels	20 W, 2.0 channels
eARC
eARC	No	No
Wi-Fi
Wi-Fi	Built-in Wi-Fi	Built-in Wi-Fi
Speaker detail
Speaker detail	Two-channel down-firing bass-reflex speakers with 20 W total output.	Two-channel speakers with 20 W total output.
Audio features
Audio features	Dolby Digital Plus, DTS, Multiroom Link and Bluetooth audio.	Dolby Digital Plus, Multiroom Link and Bluetooth audio; no DTS support is assigned from the checked maker table.
Casting
Casting	–	Mobile-to-TV mirroring, DLNA, TV-to-mobile mirroring, Wi-Fi Direct and SmartThings app support.
Software updates
Software updates	Tizen 3.0 in Samsung's developer model table. Samsung confirmed HDR10+ across its 2017 UHD lineup in December 2017; compatible firmware and content are required. Original app availability is not guaranteed today.	Tizen 4.0 in Samsung's developer model-group table. Original app availability is not guaranteed today.
TV tuners
TV tuners	DVB-T2/C/S2 digital and analogue tuners, with CI+ 1.3.	DVB-T2/C/S2 digital and analogue tuners, with CI+ 1.4.
USB
USB	Two USB ports with media playback, recording and time shift.	Two USB ports with media playback, recording and time shift.
Ethernet
Ethernet	Ethernet LAN port.	Ethernet LAN port.
Optical audio out
Optical audio out	Optical digital audio output; FWD found no 3.5 mm headphone socket on its 55-inch European unit.	One optical digital audio output.
Design and power
Size
Size	Width × height × depth without stands, from the UK manual: 40-inch 903.7 × 519.8 × 54.2 mm; 49-inch 1099.4 × 638.7 × 54.8 mm; 55-inch 1235.2 × 715.1 × 54.8 mm; 65-inch 1456.1 × 840.4 × 54.5 mm. Configuration weights exclude stands.	Width × height × depth without stands: 43-inch 970.2 × 563.2 × 58.8 mm; 50-inch 1124.8 × 650.2 × 59.7 mm; 55-inch 1238.6 × 714.2 × 59.3 mm; 65-inch 1457.5 × 837.3 × 59.7 mm. Configuration weights exclude stands.
Stand
Stand	Fixed Y-shaped stand with no swivel. UK manual with-stand weights are 10.5, 16.0, 19.0 and 26.7 kg respectively; this overrides the online table's 10.6 and 28.3 kg for 40 and 65 inches.	V-shaped central stand. With-stand weights are 12.1, 16.5, 19.7 and 28.0 kg for 43, 50, 55 and 65 inches respectively.
In the box
In the box	TM1750A Smart Remote and TM1240A standard remote for UK/Ireland, batteries, power cable, manual and analogue breakout cable.	TM1850A Smart Remote and TM1240A standard remote for UK/Ireland, batteries, power cable, manual and analogue breakout cable.