DisplayPort and HDMI 2.1 are the two connectors that carry high-refresh, high-resolution gaming signals in 2026, and picking the right one determines whether you actually hit the frame rates your GPU and monitor promise. On paper they are close, but the details around bandwidth, multi-monitor support, and device compatibility separate them in ways that matter at 4K and beyond.
This comparison lays out the real bandwidth numbers, the resolutions and refresh rates each standard supports, and where cables and adapters trip people up. If you have ever plugged in and wondered why your 144Hz screen capped at 60Hz, the answer is almost always the connector or the cable.
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Quick Verdict
For a PC connected to a gaming monitor, DisplayPort 2.1 is the better default: it offers more bandwidth (up to 80 Gbps with UHBR20), better multi-monitor daisy-chaining, and near-universal support on graphics cards. HDMI 2.1 shines when you connect to a TV or a living-room setup, delivering 48 Gbps, 4K at 120Hz, and features like VRR and eARC that consoles and TVs rely on. Use DisplayPort for the desk, HDMI 2.1 for the couch.
Key Differences
- Bandwidth: HDMI 2.1 tops out at 48 Gbps; DisplayPort 2.1 reaches 80 Gbps on UHBR20 links, giving headroom for 4K 240Hz and 8K.
- Multi-monitor: DisplayPort supports Multi-Stream Transport, so a single output can drive multiple screens through a hub or daisy chain; HDMI cannot.
- TV and console support: HDMI 2.1 is standard on modern TVs, PS5, and Xbox Series X; DisplayPort is rare on TVs.
- Audio return: HDMI’s eARC sends lossless audio back to a soundbar or receiver, which DisplayPort does not do.
- Cable sensitivity: Both need certified cables; a uni-directional DP-to-HDMI cable like the Warrky 4K only works one direction, so orientation matters.
- Adapters: A DisplayPort-to-dual-HDMI splitter can drive two displays from one DP port, useful when a GPU is short on HDMI outputs.
DisplayPort 2.1
DisplayPort is the connector graphics-card makers design around. With UHBR13.5 and UHBR20 links it carries enough bandwidth for 4K at 240Hz or 8K at 60Hz without heavy compression, which is why esports and high-refresh 1440p monitors almost always ship with a DisplayPort input as the primary connection.
Its other advantage is flexibility. Multi-Stream Transport lets you daisy-chain monitors or expand outputs with a splitter such as a USB-C-powered DisplayPort-to-dual-HDMI adapter, and it plays nicely with both NVIDIA G-SYNC and AMD FreeSync. For a pure PC gaming setup, DisplayPort is the connection to reach for first.
HDMI 2.1
HDMI 2.1 is the living-room and console standard. Its 48 Gbps ceiling handles 4K at 120Hz with VRR, and features like Auto Low Latency Mode and eARC make it the right choice for TVs, soundbars, and consoles. If you game on a big-screen OLED, HDMI 2.1 is likely your only high-refresh option.
Where HDMI gets tricky is cables and adapters. A cheap or uncertified cable can silently drop you to 4K 60Hz, and passive DP-to-HDMI cables are usually uni-directional, meaning a cable labeled DisplayPort-to-HDMI will not work in reverse. Buy a certified Ultra High Speed HDMI cable and match the adapter direction to your source and display.
Which Should You Buy?
- PC to gaming monitor: Use DisplayPort 2.1 for the highest refresh rates and best variable-refresh support.
- PC or console to a TV: Use HDMI 2.1 for 4K 120Hz, VRR, and eARC audio.
- Running two monitors from one port: A DisplayPort-to-dual-HDMI splitter solves limited GPU outputs.
- Long cable runs: Choose a certified 8K DP-to-HDMI 2.1 cable rated for your resolution rather than the cheapest option.
- Mixed setups: Keep one certified cable of each type on hand so you are never bottlenecked by the connector.
Frequently Asked Questions
Can HDMI 2.1 do 4K at 144Hz?
Yes, with Display Stream Compression enabled. Native 4K 144Hz without compression needs DisplayPort’s higher UHBR bandwidth, but HDMI 2.1 handles 4K 120Hz easily and 144Hz with DSC.
Why is my monitor stuck at 60Hz?
Usually a wrong or uncertified cable, or plugging into an older HDMI 2.0 port. Confirm both ends support the standard and use a certified high-speed cable.
Are DisplayPort-to-HDMI cables bidirectional?
Most passive ones are not. A uni-directional DP-to-HDMI cable only converts a DisplayPort source to an HDMI display, so check the labeled direction before buying.
Does the connector affect input lag?
Not meaningfully at matched resolution and refresh. Both add negligible latency; the frame rate you reach matters far more than the port type.
Final Verdict
Pick DisplayPort 2.1 for a PC-and-monitor gaming rig where you want the highest refresh rates and easy multi-monitor support, and pick HDMI 2.1 for TVs, consoles, and living-room setups that need VRR and eARC. Either way, the connector only performs as well as the cable, so invest in a certified one rated for your target resolution and you will unlock the frame rates your hardware can deliver.
