RisR5 v3 - Dual M.2 + PCIe x4

🔧 Upgraded version of a popular M.2 riser for Lenovo Tiny5 M920x / M920q / P330 Tiny – Add Dual NVMe + PCIe Expansion

Unlock the full potential of your Lenovo ThinkCentre M920x, M920q or ThinkStation P330 Tiny with the RisR5 v3.0 — a compact PCIe riser that adds:

• 2x M.2 NVMe slots (J1 & J2) – each with full PCIe x4 lanes

• 1x PCIe x4 slot – for high-speed peripherals or even more storage

• 3-pin fan connector – power a cooling fan directly for better airflow and thermal performance

Perfect for turning your small form factor PC into a home lab server, NAS, or Proxmox box.

💪 New Upgrade v3.0 is more reliable and includes:

• Improved tolerance of the pins and connector, preventing accidental short circuit when inserted

• Updated power management

• More rigid mounting kit with better fit and metal threads securing disks

Note: the photo showing correct and incorrect insertion applies to earlier versions only. The v3 connector is redesigned and eliminates this problem.

🚀 System Configuration Example

• M920x: Up to 4 NVMe drives total

• M920q: Up to 3 NVMe drives total

• Plus: PCIe x4 slot usable for network cards, USB controllers, or a fifth NVMe driveusing an adapter

• It is possible to install even a sixth drive in the WiFi slot. However, it requires a separate adapter, and it will work only with PCIe x1 lane speed.

⚠️ PCIe Bifurcation Required

To enable both NVMe slots (J1 & J2) and the PCIe x4 slot:

• You must solder two resistors on the motherboard to enable PCIe bifurcation

• Without the mod: Only J1 will function

• This mod is safe and reversible with basic soldering tools. Step-by-step guide with photos: RisR5 bifurcation guide on GitHub

• M720q: only J1 works, as its board can't be bifurcated

• The two required resistors are included with the hardware kit.

📦 What's Included

• Assembled RisR5 v3.0 board

• (Optional) Hardware kit (select variant):

  • Drive brackets with metal threads

  • Plastic spacer to mount the riser to the chassis

  • Resistors required for bifurcation

  • All required screws

🔧 Optional Upgrade Brackets

Complete your M920 build with these custom 3D-printed brackets designed to work with the PCIe riser:

• 💨 35 mm Rear Fan Bracket – mounts a rear fan to improve airflow over NVMe and SATA drives.

• 💾 mSATA Drive Bracket – replaces the 2.5" SSD tray to save space and fit a small mSATA SSD.

These brackets help maximise cooling and storage flexibility while keeping your build compact and tidy.

RisR5 is based on j4cbo's open-source Tiny5 M.2 riser.