# item.guide
Side-by-Side Comparison USB

USB 3.2 Gen 2x2 vs. USB4 2.0

Comparing 2 standards across 6 specifications. 6 key differences identified.

Comparing:
USB 3.2 Gen 2x2
USB4 2.0
USB 3.2 Gen 2x2 →

USB 3.2 Gen 2x2, part of the USB 3.2 specification released in September 2017, is the only tier in the 3.2 family that's genuinely new hardware rather than a renamed predecessor -- it doubles Gen 2's 10 Gbit/s by running two lanes simultaneously, reaching 20 Gbit/s, but only over USB-C connectors and cables wired for it.

View full USB 3.2 Gen 2x2 spec sheet →
USB4 2.0 →

USB4 2.0, released September 2022, doubles USB4's ceiling to 80 Gbit/s symmetric -- or an asymmetric 120/40 Gbit/s split favoring one direction for high-bandwidth uses like external displays. It requires new cables explicitly rated for the higher speed; existing USB4 v1 cables aren't guaranteed to reach it.

View full USB4 2.0 spec sheet →

Specification Comparison Table

6 Parameters
Parameter / Spec
USB 3.2 Gen 2x2
USB4 2.0
Released
September 2017 September 2022
Connector Required
USB-C only (dual-lane wiring not present in USB-A/B) USB-C only, with cables explicitly rated for USB4 2.0 speeds
Max Bandwidth / Data Rate
20 (2 lanes x 10 Gbit/s each) Gbit/s —
Marketing Name
USB 20Gbps —
Data Rate (symmetric)
— 80 Gbit/s
Data Rate (asymmetric)
— 120 / 40 (split favoring one direction) Gbit/s

Other Alternatives to Compare

Compare USB 3.2 Gen 2x2 vs. Micro-USB → Compare USB 3.2 Gen 2x2 vs. Mini-USB → Compare USB 3.2 Gen 2x2 vs. USB 1.1 → Compare USB 3.2 Gen 2x2 vs. USB 2.0 → Compare USB 3.2 Gen 2x2 vs. USB 3.2 Gen 1 → Compare USB 3.2 Gen 2x2 vs. USB 3.2 Gen 2 → Compare USB 3.2 Gen 2x2 vs. USB Power Delivery → Compare USB 3.2 Gen 2x2 vs. USB-A → Compare USB 3.2 Gen 2x2 vs. USB-B → Compare USB 3.2 Gen 2x2 vs. USB-C → Compare USB 3.2 Gen 2x2 vs. USB4 →