HDMI 2.1 vs 2.0 vs 1.4: What's the Difference and Which Do You Need?

Ask anyone what HDMI cable they need and most will give you a blank stare. Ask someone who's just bought a PS5 and they'll probably say 'HDMI 2.1 — but I'm not entirely sure why.' The truth is, HDMI versions are one of those things that sound technical but become genuinely simple once someone explains them clearly.

This guide does exactly that. We'll walk through HDMI 1.4, HDMI 2.0, and HDMI 2.1 — what each version actually delivers, where each version falls short, and which one you need for your specific devices and setup. By the end, you'll know exactly which cable to buy and why.

Let's get into it.

Why HDMI Version Actually Matters

HDMI stands for High-Definition Multimedia Interface. It's the standard connection that carries both video and audio between your devices — from your console to your TV, your laptop to a monitor, your set-top box to your home theatre system.

The version number tells you how much data the cable can carry per second — its bandwidth, measured in gigabits per second (Gbps). More bandwidth means higher resolution, higher frame rates, and richer audio. Less bandwidth means you hit a ceiling — and on the wrong side of that ceiling, your equipment simply can't perform at its best.

Here's the practical result of a bandwidth mismatch: plug an HDMI 1.4 cable into a PS5 and you won't get 4K 120Hz. The cable can't physically carry that much data. You'll get a downgraded picture — likely 1080p or 4K at a much lower frame rate — without any obvious warning that it's happening.

The fix is simple: understand the versions and match your cable to your hardware. That's what this guide is for.

HDMI 1.4 — Is It Still Relevant in 2026?

HDMI 1.4 was introduced in 2009 and became the universal standard through the mid-2010s. If you've got cables lying around from that era — the ones that came with older TVs, Blu-ray players, or games consoles — there's a good chance they're HDMI 1.4.

What HDMI 1.4 Supports

• Maximum bandwidth: 10.2Gbps
• Full HD (1080p) at 120Hz
• 4K at 24Hz — enough for 4K Blu-ray, but not much else
• 3D video support
• Audio Return Channel (ARC) — basic version
• Ethernet channel (rarely used)

Where HDMI 1.4 Falls Short

The fundamental problem with HDMI 1.4 is its 10.2Gbps bandwidth ceiling. 4K content at 60Hz requires around 18Gbps — nearly double what 1.4 can carry. That means:

• No 4K at 60Hz — you're stuck at 4K 24Hz at best, which is jarring for anything except cinematic film
• No HDR (High Dynamic Range) support at 4K — a massive missed feature on modern TVs
• No gaming features like VRR (Variable Refresh Rate) or ALLM
• Incompatible with 8K, obviously

Verdict: HDMI 1.4 is a legacy standard. If you're still using these cables with any modern 4K hardware, replace them now. You're actively limiting your equipment.

HDMI 2.0 — The Previous Generation Standard

HDMI 2.0 launched in 2013 and was the dominant cable standard throughout the late 2010s and into the early 2020s. Most TVs sold between 2015 and 2020 have HDMI 2.0 ports, and the cables that came with streaming devices, soundbars, and AV receivers during this period were typically HDMI 2.0.

What HDMI 2.0 Supports

• Maximum bandwidth: 18Gbps
• 4K resolution at 60Hz — proper 4K, with smooth motion
• HDR (High Dynamic Range) support — including HDR10 and Dolby Vision
• Wide Colour Gamut (WCG)
• Up to 32 audio channels
• 4K 3D content

Why HDMI 2.0 Was a Big Upgrade Over 1.4

The jump from HDMI 1.4 to 2.0 was transformative for 4K adoption. HDMI 2.0's 18Gbps bandwidth was sufficient to carry 4K 60Hz video — and combined with HDR support, it meant 4K content could finally look the way it was intended: sharp, smooth, and vivid.

For Netflix, Disney+, Apple TV 4K, and other streaming devices, HDMI 2.0 was more than adequate. For 4K Blu-ray, HDMI 2.0 was exactly what was needed.

Where HDMI 2.0 Falls Short in 2026

HDMI 2.0's 18Gbps ceiling becomes a problem as soon as you want to push beyond 4K 60Hz:

• No 4K 120Hz support — the headline feature of PS5 and Xbox Series X
• No Variable Refresh Rate (VRR) — means screen tearing in games
• No Auto Low Latency Mode (ALLM) — TV won't auto-switch to game mode
• No eARC — limited to the older ARC standard for audio
• No 8K support whatsoever

If you have a PS5 or Xbox Series X connected to a 4K TV via an HDMI 2.0 cable, you're not getting 4K 120Hz. You're getting 4K 60Hz at best — and you're missing VRR, which noticeably affects how smooth games feel.

Verdict: HDMI 2.0 is still functional for 4K streaming and non-gaming 4K setups. But for any gaming use case with a current-gen console, or any setup where you want 4K 120Hz, it's already outdated.

HDMI 2.1 — The Current Standard You Should Be Using

HDMI 2.1 was introduced in 2017 but only became widely relevant with the launch of PS5 and Xbox Series X in 2020. Since then, it's become the default recommendation for any new HDMI cable purchase — and for very good reason.

What HDMI 2.1 Supports

• Maximum bandwidth: 48Gbps — nearly triple HDMI 2.0
• 4K resolution at 120Hz — the key spec for current-gen gaming
• 8K resolution at 60Hz
• 4K at 144Hz and beyond with Display Stream Compression (DSC)
• Variable Refresh Rate (VRR) — eliminates screen tearing
• Auto Low Latency Mode (ALLM) — auto game mode on compatible TVs
• Enhanced Audio Return Channel (eARC) — supports lossless Dolby Atmos and DTS:X
• Quick Frame Transport (QFT) — reduces latency
• Quick Media Switching (QMS) — eliminates the black screen when switching sources

Why HDMI 2.1 Bandwidth Changes Everything

The jump from 18Gbps to 48Gbps isn't just an incremental improvement — it fundamentally unlocks capabilities that weren't possible before. 4K 120Hz requires approximately 40Gbps of bandwidth, which simply doesn't fit through an HDMI 2.0 cable. HDMI 2.1 handles it with headroom to spare.

That headroom also enables the gaming-specific features: VRR works by varying the frame rate dynamically, which requires the cable to handle a flexible data stream. ALLM sends a signal from the gaming device to the TV, triggering game mode automatically. These aren't software features — they require the bandwidth and protocol support that HDMI 2.1 provides.

Real-World Impact: PS5 and Xbox Series X

Both Sony and Microsoft designed their current-gen consoles around HDMI 2.1 as the required connection standard for full performance. Here's what you get with and without:

The difference between 4K 60Hz and 4K 120Hz is immediately visible in fast-moving games. Combined with VRR eliminating tearing, an HDMI 2.1 cable delivers a noticeably smoother, more responsive gaming experience.

Our HDMI 2.1 cable 2m 8K is certified for the full 48Gbps bandwidth — fully unlocking everything PS5 and Xbox Series X are capable of.

HDMI 1.4 vs 2.0 vs 2.1: Full Spec Comparison

Which HDMI Version Do You Actually Need?

Based on your devices and use case:

Get HDMI 2.1 if you have:

• PS5 or Xbox Series X
• A 4K TV with 120Hz support
• A gaming monitor at 1440p or 4K with high refresh rate
• An eARC-compatible soundbar or AV receiver
• Any setup where you want to future-proof

HDMI 2.0 may be sufficient if you have:

• A 4K 60Hz TV with no gaming use case
• A 4K streaming-only setup (Netflix, Apple TV, etc.)
• A 4K Blu-ray player only

Replace HDMI 1.4 if you have:

• Any 4K TV — you're limiting your picture quality
• PS5 or Xbox Series X — you're limiting your console's performance
• Any modern streaming device

Our recommendation is straightforward: buy HDMI 2.1 for any new purchase. HDMI 2.1 is fully backwards compatible — it works perfectly with HDMI 2.0 and 1.4 devices, operating at whatever speed those devices support. There's no reason not to buy the most capable cable available, especially when the price difference is minimal.

Shop our HDMI 2.1 cable 2m 8K — fully certified for 4K 120Hz, 8K 60Hz, VRR, eARC and ALLM.

What About HDMI 2.2?

HDMI 2.2 is the latest standard, announced at CES 2024, with 96Gbps bandwidth — double HDMI 2.1. It enables 4K at 240Hz, 8K at 120Hz, and 10K resolution support. Device support has grown significantly through 2025 and into 2026, with premium monitors, high-end GPUs, and select AV equipment now fully supporting the standard.

For most people buying today, HDMI 2.1 remains the right choice — it covers every current console and streaming device at full capability. But if you're building a high-end PC gaming setup at 4K 240Hz, or want to future-proof ahead of next-gen consoles, HDMI 2.2 is increasingly the smart buy.

We've covered this in detail: HDMI 2.2 Explained: 96Gbps, 16K and Everything You Need to Know.

Frequently Asked Questions

Is HDMI 2.1 backwards compatible with older devices?

Yes — completely. An HDMI 2.1 cable works with any HDMI-compatible device, operating at the highest bandwidth both devices support. Plugging an HDMI 2.1 cable into a device that only supports HDMI 2.0 will work perfectly at HDMI 2.0 speeds. You lose nothing by using a newer cable.

Can I tell the HDMI version by looking at the cable?

Not reliably. HDMI connectors look identical regardless of version — they're all the same physical shape (for standard Type A). The version information should be on the packaging or printed on the cable itself. If you've lost the packaging on an old cable and aren't sure, the safest move is to replace it with a new HDMI 2.1 cable.

My PS5 came with an HDMI cable. Is it HDMI 2.1?

Yes — Sony includes an HDMI 2.1 cable in the PS5 box. However, the included cable is only 1.5m. If you need a longer cable or a replacement, make sure you buy one rated for HDMI 2.1 (48Gbps / Ultra High Speed) to maintain full performance.

Does 4K 120Hz require an HDMI 2.1 TV port as well as cable?

Yes. Both the cable and the TV's HDMI port need to support HDMI 2.1 for 4K 120Hz to work. Many 4K TVs from before 2020 only have HDMI 2.0 ports — in that case, even an HDMI 2.1 cable won't unlock 4K 120Hz because the TV can't receive it. Check your TV's specs to confirm it has at least one HDMI 2.1 port.

Is HDMI 2.1 worth it for just watching Netflix?

If you're only streaming 4K content and not gaming, HDMI 2.0 is technically sufficient — most streaming services deliver 4K HDR at 60fps maximum. However, since HDMI 2.1 cables are the same price as 2.0, there's no reason not to use one. It gives you the flexibility to add a console or a higher-spec device later without replacing your cables.

The Bottom Line

The HDMI version landscape in 2026 is actually very clear: HDMI 1.4 is obsolete, HDMI 2.0 is passable for streaming-only 4K setups, and HDMI 2.1 is the right choice for almost every modern use case. The upgrade cost is minimal and the performance difference — especially for gaming — is significant.