DisplayPort and HDMI are the two dominant video cable standards, and choosing between them isn't always obvious. Both carry high-resolution video and audio. Both support 4K and beyond. Both use small, convenient connectors. But they're designed for different primary use cases, and understanding those differences helps you pick the right cable for your setup.
The fundamental difference
HDMI was designed for the living room. It connects TVs, soundbars, Blu-ray players, game consoles, and streaming devices. It's optimized for consumer electronics, with features like ARC (Audio Return Channel) and CEC (Consumer Electronics Control) that let your TV remote control your soundbar and Blu-ray player.
DisplayPort was designed for the desktop. It connects computers to monitors, especially in multi-monitor setups. It's optimized for PC use cases, with features like daisy-chaining (connecting multiple monitors with a single cable from your computer) and Adaptive Sync (variable refresh rate for smooth gaming).
Both standards have evolved to support extreme resolutions and refresh rates, but their design philosophy remains different.
Resolution and refresh rate
HDMI 2.0 supports 4K at 60Hz with 18 Gbps bandwidth. This is the current standard on most TVs and many monitors.
HDMI 2.1 supports 8K at 60Hz and 4K at 120Hz with 48 Gbps bandwidth. Found on newer TVs, gaming monitors, PS5, and Xbox Series X.
DisplayPort 1.4 supports 8K at 60Hz with DSC (Display Stream Compression) and 4K at 120Hz with 32.4 Gbps bandwidth. This has been the dominant standard on PC monitors for several years.
DisplayPort 2.1 pushes bandwidth to 80 Gbps, supporting 16K at 60Hz or 4K at 240Hz. This is the cutting edge for high-refresh gaming monitors and professional displays.
For most practical purposes, both standards support any resolution and refresh rate you'd want. The differences show up at the extremes — ultra-high refresh rates for competitive gaming or multi-monitor configurations.
Daisy-chaining (DisplayPort wins)
DisplayPort supports Multi-Stream Transport (MST), which lets you connect multiple monitors in a chain using a single DisplayPort output from your computer. Monitor 1 connects to your computer, Monitor 2 connects to Monitor 1, Monitor 3 connects to Monitor 2, and so on.
This is a significant advantage for multi-monitor workstations because it reduces cable clutter and doesn't require multiple video outputs on your GPU.
HDMI does not support daisy-chaining. Each monitor needs its own cable back to the computer (or you need an HDMI splitter, which mirrors the display rather than extending it).
Audio Return Channel (HDMI wins)
HDMI's ARC and eARC (Enhanced Audio Return Channel) features let audio travel upstream from your TV to a soundbar or AV receiver. This means you can connect a streaming app on your smart TV and have the audio play through your soundbar using the same HDMI cable — no separate optical audio cable needed.
DisplayPort doesn't have an equivalent feature. It carries audio downstream (from computer to monitor) but doesn't send audio back to external audio equipment.
Adaptive Sync and gaming
Both standards now support variable refresh rate (VRR) technology that eliminates screen tearing in games.
DisplayPort uses Adaptive Sync (which includes AMD FreeSync and is compatible with NVIDIA G-Sync Compatible monitors). DisplayPort had VRR support first and it's widely implemented.
HDMI 2.1 added VRR support, and most modern gaming TVs and monitors support HDMI VRR. HDMI 2.1 also added ALLM (Auto Low Latency Mode) that automatically switches your TV to game mode.
For PC gaming, either standard works well. For console gaming (PS5, Xbox Series X), HDMI 2.1 is the standard.
Mini DisplayPort and adapters
Mini DisplayPort is a smaller version of the standard DisplayPort connector, commonly found on older MacBooks, Microsoft Surface devices, and some compact desktops and graphics cards. It carries the same signal as full-size DisplayPort — just in a smaller connector.
DisplayPort is also easily adapted to HDMI. A DisplayPort-to-HDMI adapter or cable lets you connect a DisplayPort output to an HDMI monitor, which is useful when your computer has DisplayPort but your monitor only has HDMI.
Which should you use?
Use DisplayPort when you're connecting a desktop computer to monitors, you want a multi-monitor daisy-chain setup, you're using a high-refresh gaming monitor (144Hz+) with a PC, or your computer and monitor both have DisplayPort.
Use HDMI when you're connecting to a TV, you're connecting a game console (PS5, Xbox, Switch), you need Audio Return Channel for a soundbar setup, or you're doing a long-distance AV installation (Active Optical HDMI cables support runs up to 150 feet, while DisplayPort is limited to about 15 feet with passive cables).
At Kentek, we carry DisplayPort cables, Mini DisplayPort cables, and DisplayPort-to-HDMI adapters, plus a full range of HDMI cables including Active Optical for long-distance runs.