Thunderbolt 5 Cable 0.8m — 80Gbps, 240W, USB-IF & Intel Certified
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The Zyron Thunderbolt 5 cable is built for people who've outgrown Thunderbolt 4. If you've bought an M4 Pro MacBook Pro, a Mac Studio, or a 2025-onward Windows workstation, your machine can move 80Gbps. The cable in the box, or the USB-C cable already on your desk, almost certainly can't. This one can.
At 0.8m it's deliberately short. Long Thunderbolt cables are a signal-integrity problem and a cable-management problem. This length is the sweet spot for a dock behind a monitor, an NVMe enclosure beside a laptop, or an eGPU under the desk — and because it's a passive coaxial design under 1m, it hits full Thunderbolt 5 bandwidth without any active signal conditioning.
80Gbps data transfer, 120Gbps Bandwidth Boost
Thunderbolt 5 doubles Thunderbolt 4's bandwidth to 80Gbps in both directions simultaneously. For display-heavy work, Bandwidth Boost dynamically reallocates lanes to push up to 120Gbps toward your monitors — which is what makes triple 4K at 144Hz possible over a single port.
In practice: a 100GB ProRes project copies off an external NVMe enclosure in well under a minute. Multi-camera 8K timelines scrub off external storage instead of forcing you to ingest first. Thunderbolt networking between two Macs runs at speeds that make a 10GbE switch look slow.
240W fast charging with USB PD 3.1
Thunderbolt 5 mandates 240W power delivery — 48V at 5A under the USB PD 3.1 Extended Power Range spec. That's enough for a 16-inch MacBook Pro at full charging speed, a 17-inch gaming laptop, or a 4K monitor acting as a power hub. Thunderbolt 4 capped out at 100W, which is why so many laptops still needed a barrel-jack or MagSafe brick.
Power and data run simultaneously at full rate. You're not trading transfer speed for charging speed.
Triple 4K, dual 8K, or 4K at 540Hz
With DisplayPort 2.1 and 4-lane signal transmission, this cable drives:
- Three 4K displays at 144Hz — the standard creative or trading multi-monitor wall
- Two 8K displays at 60Hz — colour-critical grading and large-format review
- One 4K display at up to 540Hz — competitive gaming headroom
Display output depends on your host machine's capability. Apple Silicon Max chips support three external displays; Pro chips support two.
PCIe Gen 4 — real eGPU and NVMe performance
Thunderbolt 5 carries 64Gbps of PCIe Gen 4 x4 bandwidth, double Thunderbolt 4's 32Gbps. That doubling is what finally makes external GPU enclosures and PCIe expansion chassis behave like internal hardware rather than a compromise. External NVMe drives run at speeds previously reserved for drives bolted to the motherboard.
Triple certified: Intel, Thunderbolt 5, USB-IF
Thunderbolt 5 certification isn't a marketing badge — it's a test program. Certified cables are e-marked, validated for signal integrity at 80Gbps, and verified to negotiate 240W safely. Uncertified "Thunderbolt-compatible" cables sold on marketplaces routinely fail at one of those three, and the failure mode is subtle: a display that flickers under load, a transfer that silently drops to USB speeds, a laptop that charges at 60W instead of 140W.
This cable carries Intel Thunderbolt 5 certification and USB-IF certification. It does what the label says.
Built to survive daily plugging and unplugging
A premium TPE jacket is tested to 10,000+ bends, and the connectors are rated for 10,000+ plug cycles. The strain relief is moulded, not glued. If you plug and unplug this cable four times a day, that's a seven-year lifespan on the connector alone.
Works with your existing gear
Thunderbolt 5 is fully backward compatible. Plug this cable into Thunderbolt 4, Thunderbolt 3, USB4 (Gen2/Gen3/Gen4) or USB 3.2 (Gen1/Gen2) hardware and it negotiates down cleanly to whatever that device supports. You don't need a drawer of different cables — this one handles the whole desk.
Standard: Thunderbolt 5 (certified)
Certification: Thunderbolt 5, USB-IF, Intel
Cable length: 0.8m (80cm / 31.5in)
Construction: Passive coaxial
Connectors: USB-C to USB-C, reversible, double-sided
Data bandwidth: 80Gbps bi-directional
Bandwidth Boost: Up to 120Gbps (display-directed)
Power delivery: 240W max — USB PD 3.1 EPR, 48V/5A
E-marker chip: Yes
Video protocol: DisplayPort 2.1, 4-lane
Max display config: 3× 4K @ 144Hz, 2× 8K @ 60Hz, or 1× 4K @ 540Hz
PCIe throughput: 64Gbps (PCIe Gen 4 x4)
Backward compatible: Thunderbolt 4, Thunderbolt 3, USB4 Gen2/3/4, USB 3.2 Gen1/Gen2
Jacket material: Premium TPE
Durability: 10,000+ bend cycles, 10,000+ plug cycles
Colour: Black
Weight: 43 grams
Warranty: 2 years for Manufacturing Defects
Model: ZY-CB-TB5
Shipping Policy: Orders are processed and dispatched from our warehouse within 1 business day. During Sale events, please allow for up to 4 business days for dispatch.
Delivery Time:
Sydney Metro: 1-2 Business Days
Other Metro Cities: 1-3 Business Days
Other Cities: 2-4 Business Days
Remote Areas: 5-12 Business Days
If you package is not moving after 2 Business days, lost or arrives damaged, create a ticket with courier and also contact us (within 24 hours for a lost package) at support@zyrontech.com.au to lodge a claim.
You can read more about our detailed Shipping Policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
Please refer our Refund Policy for more information.
2 Years for Manufacturing Defects
COMPATIBILITY
| Your device | What you get |
|---|---|
| MacBook Pro (M4 Pro / M4 Max / M5 Pro / M5 Max) | Full Thunderbolt 5 — 80Gbps, 240W, triple display |
| Mac Studio (M3 Ultra / M4 Max) | Full Thunderbolt 5 — 80Gbps, multi-display |
| Mac mini (M4 Pro) | Full Thunderbolt 5 — 80Gbps |
| Windows laptops with Thunderbolt 5 (Razer Blade, select Dell XPS, Lenovo, Asus ROG) | Full Thunderbolt 5 — 80Gbps, 240W |
| Windows laptops with Thunderbolt 4 / USB4 | 40Gbps data transfer, charging power to the laptop's rated limit |
| iPad Pro (M4) | Thunderbolt / USB4 — 40Gbps |
| iPhone 15/16/17 Pro | USB 3 — 10Gbps, plus fast charging |
| eGPU enclosures | PCIe Gen 4 x4, 64Gbps |
| NVMe / Thunderbolt SSD enclosures | Up to 64Gbps PCIe throughput |
| Thunderbolt 5 docks and hubs | Full 80Gbps + 240W passthrough |
Thunderbolt 5 speeds require a Thunderbolt 5 host and a Thunderbolt 5 device at both ends. On older hardware this cable runs at that hardware's maximum — it will never be the bottleneck.
Thunderbolt 5 vs Thunderbolt 4 vs USB4
| Feature | Thunderbolt 5 | Thunderbolt 4 | USB4 |
|---|---|---|---|
| Data speed | 80Gbps | 40Gbps | 20–40Gbps |
| Boost mode | 120Gbps | - | - |
| Max power | 240W | 240W | 240W |
| PCIe | Gen 4, 64Gbps | Gen 3, 32Gbps | Optional |
| Display | DP 2.1 — 3× 4K@144Hz | DP 1.4 — 2× 4K | Varies |
FAQ
Frequently asked questions about Thunderbolt 5
What is Bandwidth Boost on Thunderbolt 5?
Bandwidth Boost is a Thunderbolt 5 feature that dynamically reallocates bandwidth when your setup needs more video throughput. Normally Thunderbolt 5 runs 80Gbps in each direction simultaneously. When you connect high-resolution or high-refresh displays, Boost shifts capacity toward the display path, delivering up to 120Gbps of one-directional bandwidth. That's what makes triple 4K at 144Hz or a single 4K at 540Hz achievable over one cable.
Do I need a Thunderbolt 5 cable?
You need one if you own a Thunderbolt 5 host — an M4 Pro/Max or M5 Pro/Max Mac, or a 2025-onward Windows workstation with a TB5 port — and you're connecting fast storage, an eGPU, a dock, or multiple high-refresh displays. You also need one if you want 240W charging; Thunderbolt 4 and most USB-C cables cap at 100W. For phone charging and basic file transfer, a standard USB-C cable is fine.
Is Thunderbolt 5 backward compatible?
Yes, fully. This cable works with Thunderbolt 4, Thunderbolt 3, USB4 Gen2/Gen3/Gen4, and USB 3.2 Gen1/Gen2 devices. It negotiates automatically down to whatever the connected hardware supports, so the cable is never the limiting factor.
Will this work with a MacBook Pro M4?
Yes. MacBook Pro models with M4 Pro and M4 Max chips have Thunderbolt 5 ports, so you get the full 80Gbps, Bandwidth Boost, and 240W charging. On an M4 (base) or M1–M3 MacBook Pro, the cable runs at that machine's Thunderbolt 3/4 speeds.
Can I use this Thunderbolt 5 cable with my iPhone?
Yes. It works with USB-C iPhones (15, 16 and 17 series) for charging and data. iPhone Pro models transfer at USB 3 speeds (10Gbps), which is their hardware limit — the cable supports far more, so you'll get the maximum your phone can do.
Why is this cable only 0.8m?
Passive Thunderbolt 5 cables deliver full 80Gbps bandwidth up to about 1m. Beyond that, cables need active signal conditioning, which adds cost and can introduce compatibility quirks. At 0.8m you get uncompromised full-speed performance, and the shorter run is genuinely better for desk setups — docks, monitor arms, and storage enclosures rarely need more.
What's the difference between a Thunderbolt 5 cable and a USB4 cable?
Thunderbolt 5 requires certification and mandates every optional feature: 80Gbps, 240W power, PCIe Gen 4, DisplayPort 2.1, and Bandwidth Boost. USB4 cables make most of those optional, so two USB4 cables can have wildly different real-world performance. With a certified Thunderbolt 5 cable you know exactly what you're getting.
Does it support 240W charging?
Yes. This cable is rated for 240W via USB Power Delivery 3.1 Extended Power Range (48V at 5A). It will charge a 16-inch MacBook Pro, a 17-inch gaming laptop, or any USB-C device at its maximum rated speed, assuming your charger also supports 240W.
Can it run 8K monitors?
Yes — two 8K displays at 60Hz, using DisplayPort 2.1. Actual display support also depends on your computer. Apple Silicon Max chips drive three external displays; Pro chips drive two. Check your machine's specification.
What does Intel and USB-IF certification actually mean?
Both are independent test programs. Intel's Thunderbolt 5 certification verifies signal integrity at 80Gbps, correct e-marker behaviour, and safe 240W negotiation. USB-IF certification validates USB-C electrical and mechanical compliance. Cables sold as "Thunderbolt compatible" without these certifications haven't passed either, which is why they often underperform under sustained load.
Will this improve my eGPU performance?
On a Thunderbolt 5 host, yes. Thunderbolt 5 carries 64Gbps of PCIe Gen 4 bandwidth — double Thunderbolt 4's 32Gbps. External GPU enclosures and PCIe expansion chassis see a meaningful uplift. You need a Thunderbolt 5 port on the computer for this; the cable alone won't upgrade a Thunderbolt 3 or 4 machine.
Do you ship to Australia and what's the warranty?
We're an Australian business shipping from Sydney, so orders arrive in days, not weeks. The cable comes with a 2-year Zyron warranty, and your rights under the Australian Consumer Law apply in addition to that.
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