Lian Li LIANLI PW-PCI-420 PCIe Gen4.0 Review: Specs, Pros and Cons

What stands out

• Includes two USB 3.0 Type-A ports and one USB 3.1 Type-C port
• Supports PCIe Gen4.0 for high-speed data transfer
• Compatible with SFX and SFX-L power supplies
• Provides 2.5-inch and 3.5-inch drive bays

Who it fits

Key specs explained

Color: black

This finish helps the module blend with standard PC cases and internal components. You get a uniform look without mismatched colors. Black is common for internal hardware, so it rarely draws attention. This matches most graphics cards and cases, keeping your build looking clean and professional without needing extra covers.

External I/O Ports: USB 3.0 (Type-A) x 2, USB 3.1, Type-C x 1, Audio / Mic

You get direct access to two USB Type-A ports, one Type-C port, and audio jacks. This lets you plug in drives or headsets without opening your case. The Type-C option supports modern devices. Audio ports allow for quick mic or headphone swaps. This is useful for compact builds where rear access is limited.

Maximum Length 15.6 inches (395 mm)

This dimension sets the reach of the connection. You need enough space between your PCIe slot and the front panel. If your case is small, this length ensures the cable does not stretch too far. It fits well in mini-ITX setups. Check your case dimensions to ensure this length provides the necessary slack for cable management.

Depth 5.1 inches (130 mm) (SFX/SFX-L)

This limit applies when using SFX or SFX-L power supplies. You must ensure your power supply fits within this depth constraint. It prevents the PSU from blocking the riser cable. Compact cases often use these smaller power units. Verify your specific PSU model fits within this 5.1-inch boundary to avoid physical interference with the cable installation.

Weight: 4.59 ounces

This weight indicates the physical mass of the module. It is light enough to not strain mounting points but heavy enough to feel solid. You do not need extra support brackets for this weight. It is comparable to small accessories. This mass helps it stay in place during transport or minor case movements without sliding around.

Design and Build Details

According to the listing, this module features a black finish. This color choice helps it blend with standard PC cases and internal components. You get a uniform look without mismatched colors. Black is common for internal hardware, so it rarely draws attention. This matches most graphics cards and cases, keeping the build cohesive. The model number is G89.PW-PCI420.IN, and the specific color code is black 19-3911tcx. These identifiers help you verify you are purchasing the exact variant required for your O11 Dynamic MINI case.

The physical dimensions are precise. The unit measures 7.87 inches in length, 2.36 inches in width, and 0.39 inches in height. This compact footprint is essential for small form factor builds. It allows the module to fit into tight spaces without interfering with other components. The weight is listed at 4.59 ounces. This light weight ensures the cable assembly does not strain the PCIe slot or case structure.

Layout considerations include a maximum length of 15.6 inches. This limits how far the external ports can sit from the main board. You must account for depth, with a maximum of 5.1 inches for SFX or SFX-L power supplies. Height is capped at 6.7 inches. These constraints define where you can place the unit. The design prioritizes fitment within strict compact case boundaries over extended reach.

Setup and everyday use

Setting up this Lian Li PW-PCI-420 requires careful planning around your case dimensions. The listing specifies a maximum cable length of 15.6 inches, or 395 mm. You must ensure your build has enough space for this length. The module also has a depth limit of 5.1 inches, or 130 mm, when using SFX or SFX-L power supplies. Height is restricted to 6.7 inches, or 170 mm. These limits are critical for compact builds. You need to check your CPU cooler and graphics card clearance before installation. The physical module itself measures 7.87 inches in length, 2.36 inches in width, and 0.39 inches in height. It weighs 4.59 ounces. This size fits into standard PCIe slots. Once installed, you gain access to external ports. The unit provides two USB 3.0 Type-A ports, one USB 3.1 Type-C port, and combined audio and microphone jacks. You can connect peripherals directly to the front or side of your case without reaching inside. The listing notes support for two 3.5-inch bays and two 2.5-inch bays. This helps organize storage drives near the I/O module. The PCIe Gen 4.0 interface ensures fast data transfer for connected devices. You simply plug in your USB drives or audio equipment. The black finish keeps the setup looking clean. This product is designed for users who need convenient external connectivity in small form factor PCs. It simplifies access to ports that would otherwise be hidden inside the case.

Before You Buy This Riser

Before you buy, verify your case supports the O11 Dynamic MINI form factor. The listing notes a maximum cable length of 15.6 inches. You must ensure your build has enough space for this length. Check your power supply size and CPU cooler height. The module limits depth to 5.1 inches if you use an SFX or SFX-L unit. Height restrictions apply at 6.7 inches. You also need to check storage bay availability. The listing mentions two 3.5-inch bays and two 2.5-inch bays. Plan your drive placement carefully. This risable cable connects to a PCIe slot. It provides external USB and audio ports. Keep the cable clean. Dust can accumulate on the exposed connectors. Use compressed air regularly. This module fits alongside other compact graphics card solutions. It helps manage cable clutter in small builds. You get a uniform look with the black finish. It matches most internal hardware. Ensure your motherboard supports PCIe Gen4.0 for optimal performance. This product is not a standalone graphics card. It is an accessory for your existing setup.

Check before you buy

• Verify your case supports the O11 Dynamic MINI form factor.
• Check power supply size and CPU cooler height limits.
• Ensure you have two 3.5-inch and two 2.5-inch bays.
• Confirm your motherboard supports PCIe Gen4.0 for best results.

The product at a glance

1

Lian Li PW-PCI-420 PCIe Gen4.0 Riser Cable

Best for: Compact builds needing extra USB and audio ports

Dimensions

7.87 × 2.36 × 0.39 inches

Weight

4.59 ounces

View on Amazon: Lian Li PW-PCI-420 PCIe Gen4.0 Riser Cable Affiliate link

This Lian Li riser cable connects a GPU to a motherboard via PCIe Gen4.0. It extends external I/O ports, including two USB 3.0 Type-A ports, one USB 3.1 Type-C port, and audio jacks. The cable measures 15.6 inches long with a 5.1-inch depth limit for SFX power supplies. It fits cases with available 3.5-inch and 2.5-inch bays for mounting the I/O module.

Pros

• Supports PCIe Gen4.0 x4 connectivity
• Includes USB 3.0 Type-A and Type-C ports
• Adds front audio and microphone jacks
• Fits SFX and SFX-L power supplies

Cons

• Maximum cable length is 15.6 inches
• Requires available 3.5-inch or 2.5-inch drive bays
• Height limit is 6.7 inches

Good fit if

• You need extra USB and audio ports on a small build
• You use an SFX power supply
• You have space for a 3.5-inch drive bay

Skip if

• You require a longer cable than 15.6 inches
• Your case lacks 3.5-inch or 2.5-inch bays
• Your GPU height exceeds 6.7 inches

Verdict: Lian Li PW-PCI-420 PCIe Gen4.0 Riser Cable adds convenient USB and audio ports for compact builds using SFX power supplies. It suits users who need external connectivity in small form factor cases.

Specifications side by side

Frequently asked questions

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