Will this 1.4 cable work well with a 1.2 cable rated 2 K monitor with a refresh rate of 60 Hz ?

Yes it will. Most Display Ports and HDMI ports are backwards compatible. If you have defects consider the fact. That it might me your monitor. I had a monitor once that had a white line. I switched monitors and it was gone.

Can this achieve 4k @ 144hz, 2k @ 165hz and 1080 @ 240hz?

DisplayPort 1.4 supports 4K at 120Hz, 2K at 240Hz, and 1080p at 240Hz

can this achieve 1080 at 165hz?

Yes. Refresh rates up to 240hz were achieved with version 1.2. So with version 1.4 you're well above 165hz.

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StarTech.com DP14MM2M DisplayPort 1.4 Cable - 6.6 ft / 2m - VESA Certified - 8K@60Hz - HBR3 - HDR - DP to DP Monitor Cable - 8K DisplayPort Cable

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This DisplayPort 1.4 cable is VESA certified ensuring a high-quality reliable cable for all of your audio video applications
The DP monitor cable supports HBR3 and video resolutions of up to 8K@60Hz
The 8K DisplayPort cable lets you enjoy higher contrast ratio and vivid colors with HDR support
The certified DisplayPort cable features locking connectors to provide secure connections
The DP to DP cable features thin 34 AWG wire for flexible installs with minimal clutter

Overview

Specs

Reviews (24)

CABLE - DISPLAYPORT 1.4 - 2M 6.6 FT

Best Seller Ranking	#30 in DisplayPort Cables

Model
Brand	StarTech.com
Model	DP14MM2M
Type	DisplayPort Cable
Color	Black

Details
Length	6.6 ft.
Cable Length	6.6 ft.
Connector Detail	DisplayPort 1.4 Cable
Terminal Gender	Male to Male
Specifications	Cable Jacket Type: PVC - Polyvinyl Chloride Cable Shield Type: Aluminum-Mylar Foil with Braid Connector Plating: Nickel Fire Rating: VW-1 Rated Number of Conductors: 19

Features
Features	Deliver high-quality connections with a VESA certified DisplayPort cable Experience crisp DisplayPort video with resolutions of up to 8K@60Hz using this 8K DisplayPort cable Enjoy higher contrast ratios and vivid colors with HDR support Install this flexible 34 AWG DP monitor cable with minimal clutter, or bring it with you for offsite assignments

Additional Information
First Listed on Newegg	February 13, 2019

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Warranty, Returns, And Additional Information

Warranty

Limited Warranty period (parts): 1 year
Limited Warranty period (labor): 1 year
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Return for refund until: January 31, 2026

Return for replacement until: January 31, 2026

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StarTech.com DP14MM2M DisplayPort 1.4 Cable - 6.6 ft / 2m - VESA Certified - 8K@60Hz - HBR3 - HDR - DP to DP Monitor Cable - 8K DisplayPort Cable

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Customer Reviews of the STARTECH DP14MM2M

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Warranty, Returns, And Additional Information

Warranty

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Manufacturer Contact Info

Item#: N82E16812399302

Best Sellers

StarTech.com DP14MM2M DisplayPort 1.4 Cable - 6.6 ft / 2m - VESA Certified - 8K@60Hz - HBR3 - HDR - DP to DP Monitor Cable - 8K DisplayPort Cable

Learn more about the STARTECH DP14MM2M

Customer Reviews of the STARTECH DP14MM2M

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info