Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallCrashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteiTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
USB-C is only the connector. USB4 and Thunderbolt 4 are different connectivity standards that use it. USB4 products can be labeled for 20Gbps or 40Gbps performance, while the USB4 version 2.0 context describes operation up to 80Gbps with appropriately certified cables. Thunderbolt 4 certification requires 40Gbps bandwidth plus defined minimum data, power, and video capabilities. The result you get is determined by the entire chain: computer port, cable, dock or peripheral, display, and power supply.
USB-C, USB4, and Thunderbolt 4 are not interchangeable labels
The oval USB-C plug tells you its physical shape, not what is traveling through it. A USB-C port might carry an older USB generation, USB4, Thunderbolt, DisplayPort video, USB Power Delivery, or only some of those functions. Two ports that look identical can therefore have very different rates and capabilities.
USB4 is a USB-IF standard. Thunderbolt 4 is an Intel certification program built around a USB-C connection and defined minimum capabilities. Both can carry data, displays, and power, but the wording on a product specification matters more than the connector.
Free tools Windows power users keep installed
One-click scans. No signup required.
Intel summarizes the Thunderbolt requirement this way: “Thunderbolt™ 4 certification requires support for power, data, and video with constant 40 Gbps bandwidth.” That is a certification floor, not a promise that every connected device will transfer files at 40Gbps. A slower cable, peripheral, display mode, or negotiated protocol can reduce the link.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
USB4 speed tiers: read the number beside the standard
USB-IF product and packaging guidance identifies USB4 20Gbps and USB4 40Gbps performance labels. A product described only as “USB4” leaves the buyer to find the actual rate in the detailed specification. USB-IF’s current USB4 overview, in the USB4 version 2.0 context, describes operation up to 80Gbps over 80Gbps-certified cables. That is an upper capability of the newer specification context, not evidence that every product sold as USB4 reaches 80Gbps.
| Label or context | What it establishes | What it does not establish |
|---|---|---|
| USB4 20Gbps | A USB-IF performance label for a 20Gbps-class USB4 product. | It does not imply 40Gbps or 80Gbps operation, Thunderbolt features, or a particular display mode. |
| USB4 40Gbps | A USB-IF performance label for a 40Gbps-class USB4 product. | It does not guarantee that the host, cable, and peripheral will all negotiate 40Gbps. |
| USB4 version 2.0 context | USB-IF’s overview describes up to 80Gbps over 80Gbps-certified cables. USB-IF lists the USB4 Specification version 2.0 date as April 2, 2026. | It does not make existing USB4 ports, cables, docks, or computers 80Gbps-capable. |
USB4 dynamically shares its link among data and display protocols. The usable data rate can therefore vary with the number and type of displays, storage traffic, tunneling overhead, and the implementation in the host and accessory. Treat the printed rate as a capability class rather than a file-copy benchmark.
What Thunderbolt 4 guarantees—and what it still leaves to the system
Thunderbolt 4 certification specifies 40Gbps bandwidth and minimum support for data, power, and video. Intel lists support for up to two 4K displays or one 8K display, and up to 100W laptop charging. Intel also lists up to 15W for computer-powered accessories. These are “up to” capabilities: the computer’s graphics hardware, display inputs, dock design, charger, and cable determine the mode that actually works.
Recommended Free Tools
High-resolution displays can require Display Stream Compression (DSC), and Intel notes that some computers and monitors may need it. A Thunderbolt 4 label does not override a host’s graphics limits or a monitor’s supported refresh rate. Check the complete display specification before assuming that two 4K screens will run at your desired refresh rate.
Thunderbolt 4 is therefore easier to shop for when you need a known baseline. USB4 can match or exceed that bandwidth in the appropriate tier, but USB4 alone does not impose the same minimum feature set on every product.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Compatibility is negotiated across the whole connection
When standards are mixed, devices negotiate a mode they can all support. Intel describes the result as the lowest common capability among the connected USB and Thunderbolt devices. A 40Gbps computer connected through a 20Gbps cable to a 20Gbps enclosure will operate at the lower rate. Replacing the cable cannot make a 20Gbps port faster.
USB-IF describes USB4 backward compatibility with USB 3.2, USB 2.0, and Thunderbolt 3. That statement means a USB4 product can support those legacy connections under the specified conditions; it does not mean that every USB4 port includes every Thunderbolt feature. USB-IF’s Thunderbolt 3 compatibility requirements, dated January 2021, define conditions a USB4 product must fulfill to claim Thunderbolt compatibility. For older Thunderbolt equipment, use the computer and accessory maker’s exact compatibility statement rather than assuming that any USB-C or USB4 combination will work.
| Connection chain | Likely negotiated outcome | Buyer’s verification task |
|---|---|---|
| USB4 40Gbps host, USB4 40Gbps cable, USB4 40Gbps storage | A 40Gbps-class USB4 link, subject to the storage device’s implementation and workload. | Confirm all three specifications state 40Gbps. |
| Thunderbolt 4 host, Thunderbolt-certified cable, Thunderbolt 4 dock | Thunderbolt 4 features within the host, dock, display, and power limits. | Check display modes, charging output, and the dock’s own port mix. |
| USB4 host and Thunderbolt 4 peripheral | Compatibility depends on the host’s stated Thunderbolt support; USB4 alone is not proof of it. | Look for an explicit Thunderbolt compatibility claim for that model. |
| Thunderbolt 4 host and older USB device | A legacy USB mode at the device’s supported rate. | Check the device generation and whether it needs a special adapter or driver. |
Displays: resolution, refresh rate, and compression matter
Video consumes part of the link and is not specified by the connector shape. Before buying a dock or adapter, write down the exact target: number of displays, resolution, refresh rate, color format if relevant, and whether HDR or DSC is required. Then compare that target with the computer’s graphics specification and the dock’s display-output table.
Thunderbolt 4’s Intel-defined capability is up to two 4K displays or one 8K display. “Up to” includes important conditions: a host may have fewer graphics outputs, a monitor may accept only certain refresh rates, and a dock may divide bandwidth among several ports. USB4 hosts vary even more because the standard does not require one universal display configuration for every product.
If a display works at a lower resolution but not at the requested refresh rate, test the chain in order: connect the display directly to the computer, use the cable specified for that mode, remove other high-bandwidth devices, and confirm whether the host or monitor requires DSC. A successful lower mode proves that some video path exists, not that the advertised maximum is available.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Charging and power delivery are separate checks
Data-rate labels do not tell you how much power a port can deliver. USB4 products may support USB Power Delivery at different wattages, so read the computer, dock, charger, and cable specifications together. Confirm both the laptop’s required input wattage and the charger or dock’s output profile.
Intel lists up to 100W laptop charging for Thunderbolt 4 and up to 15W for computer-powered accessories. Those figures describe the Thunderbolt 4 feature set; the specific computer and power supply still govern the wattage delivered. A dock connected to a low-power charger can provide less power than the dock’s maximum, and some laptops accept charging only through designated ports.
When a laptop battery drains while connected to a dock, compare three figures: the laptop’s stated input requirement, the dock’s maximum power-delivery output, and the charger’s capacity after the dock reserves power for itself and attached devices. The USB-C plug can remain physically compatible even when the power budget is insufficient.
Cables: the most overlooked part of the link
Choose a cable whose stated performance matches the intended connection. USB-IF’s guidance names USB4 20Gbps and USB4 40Gbps product performance labels and describes operation up to 40Gbps over 40Gbps-certified cables. The USB4 version 2.0 overview adds the 80Gbps context over 80Gbps-certified cables.
For Thunderbolt functions, use a Thunderbolt-certified cable rated for the required speed. Check its length and whether it is active or passive when the manufacturer specifies those distinctions. Longer or differently constructed cables may have different limits. A cable cannot add Thunderbolt support to a USB4-only host, increase a 20Gbps port to 40Gbps, or supply missing charging capability.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
- Match the cable’s printed or documented rate to the host and peripheral rate.
- Verify certification when a dock, display chain, or older Thunderbolt accessory requires it.
- Check the cable length against the maker’s stated bandwidth and display limits.
- For charging, confirm the cable’s supported power, not just its data label.
A buying checklist that prevents expensive mismatches
- Inventory the computer port. Find the exact computer model specification and identify each port’s protocol, maximum rate, display support, and charging capability. Do not infer Thunderbolt support from the processor family or the USB-C shape.
- Define the job. Decide whether you need fast storage, an external display, laptop charging, a dock with several accessories, or all of these at once. Each function can have a different requirement.
- Read the accessory specification. For a dock, enclosure, monitor, or adapter, check the required host protocol, maximum data rate, display combinations, and power input or output. Look for a model-specific compatibility list.
- Select the cable. Buy the stated USB4 20Gbps, USB4 40Gbps, USB4 80Gbps-context, or Thunderbolt-certified cable appropriate to the connection. Confirm length and power rating.
- Validate the display mode. Compare the complete target mode—screen count, resolution, refresh rate, and DSC requirement—with both host and dock specifications.
- Validate the power budget. Compare the laptop’s input requirement with the charger, dock output, and cable rating. Treat “up to 100W” as a ceiling, not a guaranteed delivery for every setup.
- Check legacy equipment explicitly. If a Thunderbolt 3, USB 3.2, or USB 2.0 device is important, confirm the exact backward-compatibility statement and any adapter requirement.
- Plan for the weakest link. The final mode is limited by the lowest capability in the host, cable, peripheral, display, and power chain.
Which standard fits common workloads?
| Workload | What matters most | How to choose |
|---|---|---|
| External NVMe storage | Sustained data rate, enclosure controller, thermal design, and cable rating. | Choose a USB4 40Gbps-class or Thunderbolt 4 path only when the computer, enclosure, and cable all support it; do not equate link rate with guaranteed file-copy speed. |
| One high-resolution monitor | Host graphics output, resolution, refresh rate, DSC, and the monitor input. | Verify the exact mode in the computer and dock specifications. USB4’s generic label is insufficient. |
| Several displays and peripherals | Dock bandwidth allocation, display topology, USB port speeds, and power delivery. | Thunderbolt 4’s defined minimums can simplify selection, but confirm the dock’s specific display table and charger requirement. |
| Laptop charging through a dock | USB Power Delivery profile, charger wattage, dock overhead, and cable power rating. | Compare all four figures; a high data-rate label does not guarantee adequate charging. |
| Mixed legacy accessories | Backward compatibility and required adapters. | Use the manufacturer’s compatibility statement for the exact USB or Thunderbolt generation. |
Common buying mistakes and fixes
Assuming every USB-C port is Thunderbolt
Symptom: A Thunderbolt dock or enclosure is not detected, or it falls back to a basic USB mode. Fix: Check the computer’s model-specific port table for Thunderbolt support; USB-C appearance is not evidence.
Buying a generic cable for a maximum-rate setup
Symptom: Storage negotiates at a lower speed or a display loses signal at its maximum mode. Fix: Replace the cable with one whose certification and rate match the required USB4 or Thunderbolt connection, and verify its length.
Reading “up to” as a guaranteed operating mode
Symptom: A setup supports one 4K screen but not two, or charges more slowly than expected. Fix: Check host graphics, dock bandwidth allocation, charger capacity, and the exact display and power conditions.
Expecting a cable to upgrade an endpoint
Symptom: A new 40Gbps or 80Gbps cable produces no speed increase on an older port. Fix: Treat the cable as one component of the chain; the host and peripheral must also support the desired tier.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Generalizing Thunderbolt 3 compatibility
Symptom: An older Thunderbolt accessory works inconsistently or not at all with a USB4 computer. Fix: Consult the exact maker-stated compatibility for both devices. USB-IF’s Thunderbolt 3 requirements describe conditions for a USB4 product to claim compatibility, not a universal guarantee for every model.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Practical decision rule
Choose Thunderbolt 4 when you want a clearly defined 40Gbps baseline and the certification’s minimum data, display, and power features align with your system. Choose a USB4 product when its exact performance label and feature list meet your needs; USB4 40Gbps can be an excellent match, while an unspecified USB4 port requires further checking. The newer USB4 version 2.0 context reaches up to 80Gbps with certified equipment, but that capability should be treated as a product-specific specification rather than an assumption about all USB4 hardware.
Before paying, verify the protocol and rate on the computer, accessory, and cable; verify display mode and charging wattage; then check any legacy-device compatibility statement. This whole-chain inspection is more reliable than choosing by the USB-C shape or by a single headline speed.
Frequently Asked Questions
Why do two USB4 ports on the same computer sometimes behave differently?
Manufacturers can implement different rates or functions on individual ports. Consult the model’s port diagram or specification for each connector instead of assuming they are equivalent.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteCan I use a USB4 cable with a Thunderbolt 4 device?
Only if the cable and the connected host and device support the required Thunderbolt mode. For guaranteed Thunderbolt functions, use a Thunderbolt-certified cable and follow the device maker’s compatibility statement.
Why does my external drive show a lower speed than the port label?
The negotiated link follows the lowest capability in the host, cable, enclosure, and drive, and real transfers also depend on the storage controller, thermals, and workload.
Does an adapter change USB4 into Thunderbolt 4?
An adapter can provide a physical or protocol bridge only when its specifications explicitly support the required standard. A passive plug or generic USB-C adapter cannot create missing Thunderbolt capability.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
