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Black adaptor cable with 9-pin male and 20-pin female connectors

Qin Bo Electronics

Qin Bo Electronics QBU20M29F USB 2.0 9-pin to USB 3.0 20-pin adaptor cable

SKU CH-79M1-WT2WB

Connects a USB 3.0 20-pin header device to a USB 2.0 9-pin motherboard header at 480 Mbps over a 4.65 inch cable

  • Connection typeLighting Connector to USB A
  • Product typeAdaptor Extension Cable
  • Product colorBlack
  • DetailsLet your USB 3.0 20pin device connected the USB 2.0 9 pin mo
  • Key featuresLet your USB 3.0 20pin device(such as Drive panel, floppy pa
  • Connect USB 3.0 20-pin devices to USB 2.0 9-pin motherboard headers
  • USB 3.0 devices operate at USB 2.0 480 Mbps data transfer speed
  • 65-inch cable length fits compact internal routing
  • Black colour matches standard motherboard aesthetics
  • Converter adapts 20-pin header to 9-pin housing for drive or floppy panels

USB 2.0 9-pin to USB 3.0 20-pin adaptor

This adaptor cable connects a motherboard USB 2.0 9-pin header to a USB 3.0 20-pin front-panel or drive device. It is intended for builders who need to use newer front-panel ports on an older header. The cable measures 4.65 inches in length. Data speed is limited to USB 2.0 rates.

Thermals noise and power

The passive cable draws no external power and generates no audible noise during operation. It adds negligible thermal load inside the chassis. No active cooling or additional power connectors are required.

Speed limitation

USB 3.0 devices connected through this adaptor operate at 480 Mbps, the maximum speed of the USB 2.0 header. Buyers who need full USB 3.0 bandwidth should not use this cable.

How it compares

Measured against everything we stock in USB Cords & Extension Cables, at today’s prices. Recalculated every night.

Price $3.99
Cheaper than about 96% of the 15,227 comparable items (median $14.99).

Specifications

Product
Brand nameEn-Labs
Model nameQBU20M29F
Product typeAdaptor Extension Cable
Product colorBlack
Ports & slots
Connection typeLighting Connector to USB A

Questions about this item

How do I connect the 9-pin male header to my motherboard without bending the pins?

Align the keyed 9-pin male connector with the USB 2.0 header on the motherboard, press straight down until fully seated, then attach the 20-pin female end to your USB 3.0 front-panel device; the 4.65 inch cable allows slack for routing.

Will the USB 3.0 20-pin device eventually need a different adapter to regain 5 Gbps speed?

Yes — this adaptor limits traffic to USB 2.0 480 Mbps, so restoring full USB 3.0 performance later requires a motherboard with a native 20-pin USB 3.0 header or a separate PCIe USB 3.0 card.

What throughput ceiling appears first when copying large files continuously through this cable?

The USB 2.0 480 Mbps signalling rate is the hard limit; sustained transfers will not exceed this bandwidth regardless of the attached USB 3.0 device capability.

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