USB4.0 vs. Thunderbolt 4 Cables: What’s the Difference?
Ever stared at a USB-C cable, confused whether it’s USB4.0 or Thunderbolt 4? You’re not alone. These two standards share the same USB-C port but differ drastically in performance, compatibility, and use cases. Let’s cut through the jargon and help you pick the right cable for your devices. USB4.0 vs. Thunderbolt 4: Key Differences at a Glance Feature USB4.0 Cables Thunderbolt 4 Cables Protocol Base Open standard (USB-C) Intel’s enhanced USB4.0 40Gbps protocol Minimum Bandwidth 20Gbps (optional 40Gbps) 32Gbps (mandatory; max 40Gbps) Power Delivery (Min) 7.5W 15W (double USB4.0) Cable Length & Speed ≤2m: 40Gbps; >2m: drops to 20Gbps ≤2m: 40Gbps; >2m: maintains 40Gbps Cable Labeling “USB 20” or “USB 40” logo Lightning bolt with “4” logo Interoperability Works with Thunderbolt 4 ports (limited by USB4 specs) Works with USB4 ports (performs at USB4 speeds) 1. Protocol Basics: Why They Look the Same (But Aren’t) Both use the universal USB-C connector, but their ...