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Green PCB PCIe card with silver bracket and single blue USB-C port

RIITOP

RIITOP USB 3.2 Gen 2x2 20Gbps Type-C PCIe Adapter Card

SKU CH-536R-NAV78

Adds one 20 Gbps USB-C port with 15 W power delivery via PCIe 3.0 x4 using an ASMedia ASM3242 controller

  • Product typeController Card
  • Add a 20Gbps USB-C port for NVMe drives
  • Deliver up to 15W power to charge devices
  • ASMedia ASM3242 controller uses PCIe 3.0 x4 lanes
  • Multiple INs support cuts bandwidth loss on hubs
  • Works with Windows, Linux and macOS auto drivers

Add 20 Gbps USB-C to a desktop

The RIITOP USB 3.2 Gen 2x2 PCIe adapter installs in a PCIe 3.0 x4 slot and adds a single Type-C port that delivers up to 20 Gbps throughput. The ASMedia ASM3242 controller enables fast access to NVMe drives and other high-speed peripherals while providing up to 15 W of power for charging devices.

ASM3242 controller and UASP support

The host controller uses four PCIe 3.0 lanes and supports Multiple INs to reduce bandwidth loss when several devices share a hub, provided the hub also supports the feature. UASP support further improves storage performance, and the card remains backward compatible with USB 3.1, 3.0 and 2.0 devices.

Storage speed and compatibility limits

The 20 Gbps link comfortably handles NVMe solid-state drives and external SSD enclosures at near-native speeds. The port supplies 5 V at 3 A for power-hungry peripherals but does not support DisplayPort Alt Mode, so video output over USB-C is not possible.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $27.99
Cheaper than about 55% of the 891 comparable items (median $30.99).

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Specifications

Product
Product typeController Card

Questions about this item

Will the ASM3242 controller or the 15W USB-C port need replacement after heavy daily use?

The ASM3242 controller is a solid-state PCIe 3.0 x4 device with no moving parts, so it does not wear out. The USB-C port is rated for 15W (5V/3A) power delivery and standard mating cycles; no scheduled replacement is required.

What limits sustained 20Gbps throughput first — the PCIe 3.0 x4 link or the ASM3242 controller?

The PCIe 3.0 x4 interface provides approximately 32Gbps of raw bandwidth, while the ASM3242 host controller caps USB traffic at 20Gbps. Therefore the controller is the first limit under continuous load.

How much heat and power does the card draw when the USB-C port runs at 15W all day?

The card draws its operating power from the PCIe slot and delivers up to 15W (5V/3A) to attached devices. Total heat output equals the slot power plus the 15W port load; no active cooling is fitted.

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