# WisdPi PROM21 All in Expansion Card

The PROM21 All in is a flagship PCIe x4 expansion card powered directly by the AMD B650 (Promontory 21) desktop chipset. It delivers desktop-grade I/O bandwidth, massive storage capacity, and next-gen connectivity to any workstation or high-performance PC.

Standard usage

<figure><img src="/files/YjOitbv6KORSfMSd2FDj" alt=""><figcaption></figcaption></figure>

## Features

* Desktop Chipset Power: Built around the AMD B650 chipset for rock-solid stability and massive data throughput over a single PCIe x4 slot.
* Switchable Oculink Port: Features a versatile Oculink interface that multiplexes PCIe and SATA signals. Easily switch between configurations via the onboard DIP switch (SW1) to support external GPUs or enterprise storage arrays.
* Quad M.2 Storage Matrix: Equipped with 4x M.2 slots (2 on the front, 2 on the rear). Maximize your storage capacity with support for high-speed NVMe and SATA SSDs using the chipset's dedicated downstream lanes.
* High-Speed USB Hub: Rear I/O includes a blisteringly fast 20Gbps USB-C port alongside four 10Gbps USB-A ports for zero-bottleneck peripheral connections.
* Robust Power & Cooling: Features a dedicated external power connector (EXT\_PWR) to ensure stable voltage under heavy loads, paired with a custom aluminum heatsink and a dedicated cooling fan header.

## Spec

| **Feature**       | **Specification**                                                                |
| ----------------- | -------------------------------------------------------------------------------- |
| Controller        | AMD Promontory 21 (B650 Chipset)                                                 |
| Host Interface    | PCIe 4.0 x4                                                                      |
| Storage Expansion | 4x M.2 Slots (Front: M.2\_1, M.2\_3 / Rear: M.2\_2, M.2\_4)                      |
| Next-Gen I/O      | 1x Oculink Port (Multiplexed PCIe/SATA, switchable via SW1)                      |
| External USB      | <p>1x USB 3.2 Gen 2x2 Type-C (20Gbps)</p><p>4x USB 3.2 Gen 2 Type-A (10Gbps)</p> |
| Internal USB      | Front Panel Type-E header & standard USB headers                                 |
| Power Delivery    | PCIe Slot Power + `EXT_PWR` Auxiliary Power Connector                            |
| Cooling           | Aluminum Heatsink with onboard Fan Header (FAN)                                  |
| Compatibility     | x86(AMD/Intel) / ARM(Mac Silicon Series/Raspberry Pi 5) standard PCIe            |
| Size              | 175x70mm                                                                         |

## IO

<figure><img src="/files/LsDc2hS4XntOzQoFmjcT" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/00yCVFDHP1Zs4uv3uR2o" alt=""><figcaption></figcaption></figure>


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