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Green PCB add-in card with two horizontal M.2 slots and two vertical SATA ports, plus a low-profile bracket

STARTECH

STARTECH PEXM2SAT3422 RAID controller 2× M.2 SATA 2× SATA III PCIe x4

SKU CH-K0TN-9M80B MPN PEXM2SAT3422

Adds two M.2 SATA SSDs and two SATA III ports via PCIe x4 with hardware RAID 0, 1, 10 and JBOD support

  • Interface typeM.2 SATA (NGFF) SATA
  • Internal connectors2 - M.2 (NGFF; B-Key) Receptacle 2 - SATA (7 pin; Data) Plug
  • Transfer speedSerial ATA 3.0 specification - SATA I/II/III (1.5/3/6 Gbit/s
  • Supported RAID modesJBOD - (Just a Bunch of Disks) RAID 1 (Mirrored Disks) RAID
  • Supported operating systemsWindows 10 (32-bit or 64-bit), 8 / 8.1 (32-bit or 64-bit), 7
  • Supported platforms0.15 lb (0.07 kg)
  • Adds two M.2 SATA SSDs and two SATA III ports via PCIe x4
  • Hardware RAID 0, 1, 10 and JBOD modes supported
  • Compatible with Windows, macOS 10.8+ and Linux 3.5
  • Low-profile bracket and M.2 screws included in the box
  • Compact 4.70" x 7.10" card fits tight server chassis

M.2 SATA RAID controller

The StarTech PEXM2SAT3422 adds two M.2 NGFF B-key slots and two SATA III ports through a PCIe x4 connection. It targets builders who want hardware RAID across SATA M.2 drives and legacy SATA disks in a single card. The board supports JBOD, RAID 0, RAID 1 and RAID 10 modes for redundancy or speed. Windows, macOS and Linux drivers cover current and older releases.

PCIe x4 add-in card fit

The card occupies one PCIe x4 slot and includes a low-profile bracket for compact chassis. Two M.2 mounting screws secure the drives while a 4-pin SP4 power connector feeds them directly. Two native SATA III ports remain free for additional hard drives or SSDs without port multipliers. No extra power cables or adapters are required beyond the slot and SP4 header.

Sustained RAID workloads

Hardware RAID offloads parity calculation from the CPU during long mirror or stripe operations. NCQ support keeps command queues full across all four attached drives. SATA 6 Gbps links deliver consistent throughput for backup, recovery or hybrid-drive caching tasks. The controller maintains stability over extended transfers without thermal throttling or driver resets.

How it compares

Measured against everything we stock in RAID & Drive Controller Cards, at today’s prices. Recalculated every night.

Price $73.99
Cheaper than about 67% of the 219 comparable items (median $155.99).

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Specifications

Product
Brand nameStarTech.com
Model namePEXM2SAT3422
Product type1 - PCI Express x4 Male
Performance
Transfer speedSerial ATA 3.0 specification - SATA I/II/III (1.5/3/6 Gbit/s)
Storage
Supported RAID modesJBOD - (Just a Bunch of Disks)
RAID 1 (Mirrored Disks)
RAID 0 (Striped Disks)
RAID 10 (1+0; Striped set of Mirrored Subset)
Ports & slots
Interface typeM.2 SATA (NGFF)
SATA
Internal connectors2 - M.2 (NGFF; B-Key) Receptacle
2 - SATA (7 pin; Data) Plug
1 - SP4 (4 pin; Small Drive Power) Male
Size & build
Product dimensions4.7 in × 0.8 in × 7.1 in
Shipping weight0.18 kg
Package size246 × 157 × 43 mm
Compatibility
Supported operating systemsWindows 10 (32-bit or 64-bit), 8 / 8.1 (32-bit or 64-bit), 7 (32-bit or 64-bit)
Windows Server 2012, 2008 R2
Mac OS 10.8 and later (tested up to 10.11)
Linux 3.5
Supported platforms0.15 lb (0.07 kg)
In the box
In the box1 - M.2 SSD RAID controller card
1 - low-profile bracket
2 - M.2 mounting screws
1 - quick-start guide

Questions about this item

Does the PCIe x4 slot provide enough bandwidth for four SATA 6 Gbps drives simultaneously?

The card uses a PCIe x4 interface and each SATA port runs at up to 6 Gbps, so the slot can saturate all four ports at once.

How loud or hot does the card get when all four drives run continuously?

The controller is passively cooled with no fan, so it adds no audible noise; heat output is low enough for standard case airflow.

What extra cable or connector is required to power the M.2 and SATA drives?

A 4-pin SP4 power connector on the card supplies drive power; you need a matching lead from your power supply.

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