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Green PCB adapter card with PCIe x4 slot M.2 connector and floppy power cable

JMT

JMT LM-141X-V1.0 M.2 to PCI-E X4 Adapter Card

SKU CH-14E8-VCCEE

Converts an M.2 NGFF M-key slot into a PCI-E x4 connection for desktop or laptop expansion

  • In the box1 x PCI-E 4X to NGFF M.2 B+M Key Adapter Card 1 x Floppy 4 P
  • Converts M.2 NGFF to PCI-E X4 slot
  • Driver-free operation across Windows and Linux
  • Floppy 4-pin power for stable delivery
  • Fits 2260 and 2280 module lengths
  • Supports up to 4.0 GB/s throughput

M.2 to PCI-E X4 Adapter Card

The JMT LM-141X-V1.0 converts an M.2 NGFF M-key slot into a standard PCI-E X4 female socket. It targets builders who want to install a PCI-E expansion card inside a desktop or laptop that only offers an M.2 Socket 3 interface. The board includes fixed mounting holes for 2260 and 2280 form-factor modules. No software drivers are required for operation.

Fits into a build with an M-key slot

Installation uses the supplied screw and screwdriver to secure the adapter into the M.2 Socket 3 PCIe-based slot. A floppy 4-pin to Molex power cable is included to provide stable auxiliary power for the connected PCI-E card. The adapter is transparent to the operating system and supports Windows, Win CE and Linux without extra configuration.

Replaces a direct PCI-E slot when none is free

This adapter upgrades a system by unlocking an otherwise unused M.2 Socket 3 lane for general PCI-E X4 expansion. The jump is worth it when a builder needs to add a PCI-E 1x or 4x card but lacks an open full-size slot. It does not support M.2 SATA modules or sockets wired for other keyings.

How it compares

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

Price $11.99
Cheaper than about 90% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameWBTUO
Model nameLM-141X-V1.0
In the box
In the box1 x PCI-E 4X to NGFF M.2 B+M Key Adapter Card 1 x Floppy 4 Pin to Molex Power Cable 1 x Screw 1 x Screwdriver

Questions about this item

What is the maximum data-transfer rate this adapter can sustain?

The card supports data transfer up to 4.0 GB/s over a PCIe x4 link.

How much heat or power draw should I expect when the adapter runs continuously?

The board is passive with no fan; it draws auxiliary power through the included floppy 4-pin to Molex cable for stable operation.

Which M.2 module lengths does the board physically accommodate?

Two fixed mounting holes are spaced for 2260 and 2280 form-factor modules.

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