Does the Nippon Labs HDMI cable require an external power supply?

No, this cable does not require an external power supply.

What is the maximum resolution supported by the Nippon Labs 60ft. 8K High Speed AOC Fiber Optic HDMI 2.1 Cable?

The maximum resolution supported by this cable is 8K at 60Hz, which is 7680 x 4320.

Questions & Answers: Nippon Labs 60ft. 8K High Speed AOC Fiber Optic HDMI 2.1 Cable - High Speed 48Gbps 8K(7680 x 4320)@60Hz, HDCP 2.2, YCbCr 4:4:4, CL3 Rated Active optical cable - 60HDMI-AOC-8K-60 (anti-static bags)

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Nippon Labs 60ft. 8K High Speed AOC Fiber Optic HDMI 2.1 Cable - High Speed 48Gbps 8K(7680 x 4320)@60Hz, HDCP 2.2, YCbCr 4:4:4, CL3 Rated Active optical cable - 60HDMI-AOC-8K-60 (anti-static bags)

8K@60Hz HDMI 2.1 Cable: Ultra Resolution 8K 7680*4320, compatible with HDMI 2.0b/2.01/2.0/1.4/1.3/1.2/1.1, support 8K@60Hz, 4K@120Hz, UHD, HDR, providing Ultra HD Video Transmission Experience and 3D Visual Effects, Audio and Video Sync Transmission
48Gbps Super High Speed: HDMI 2.1 Version, bandwidth up to 48Gbps, high-speed transmission without signal loss, HDR 4:4:4 color format, Dolby Vision 7.1, CEC, EDID, HDCP2.2, DTS-HD Master Audio and Dolby Atmos, Enhanced Audio Return Channel (eARC)
Universal Compatibility: Compatible with Apple TV, LG TV, Samsung QLED TV, Fire TV, Roku, Playstation,Sony 8K UHD TV, Blu-Ray, Laptop, PC, DVD, PS3, PS4 Pro, Xbox 360, Xbox one S and Wii U, Tivo, Vizio, Blu-ray player, Projector,etc
EARC (enhanced audio Return Channel): EARC Supports the most advanced audio formats.
No external power supply required
Cable Diameter: OD4.7mm (+/- 0.2mm)
CL3 Rated Jacket

$178^.55 –