This article covers I/O Crest 4ポート SATA III PCI-e 2.0 x1 コントローラーカード Marvell 9215 非RAID ロープロファイルブラケット付き SI-PEX40064.

Overview

The I/O Crest SI-PEX40064 is a 4-port SATA III controller card that fits into a PCI Express x1 slot. It uses the Marvell 88SE9215 chipset and is designed as a simple port expansion card without RAID functionality. A low-profile bracket is included, making it suitable for compact cases.
This product is ideal for users who have run out of SATA ports on their motherboard and need a cost-effective way to add four more. Despite using PCIe 2.0 x1, it supports SATA 6Gbps transfer speeds, which is sufficient for most HDDs and SATA SSDs. Priced around ¥7,000–¥8,000, it sits firmly in the entry-level expansion card segment.

Connectivity & Compatibility

The card uses a PCI Express x1 (version 2.0) interface and is compatible with x2, x4, x8, and x16 slots. It supports SATA 6Gbps, 3Gbps, and 1.5Gbps hard drives and SSDs. Four internal SATA ports are provided, each operating on an independent channel.
Four 16-inch SATA cables are included for connecting drives. The low-profile bracket is pre-installed, allowing installation in slim or small-form-factor cases without additional purchases. A driver CD and manual are also included.

Product Info

This card has been on the market for several years and remains available through retailers like online retailers. The current price is approximately ¥7,382 (tax included). Warranty is typically one year from the manufacturer. Accessories include four SATA cables, a driver CD, a low-profile bracket, and a manual.
Market positioning is entry-level. It lacks RAID support and hardware cache, focusing purely on port expansion. Competing products often use ASMedia chips, but the Marvell 88SE9215 is known for stability and long-term reliability.

Best Use Cases

  • DIY PC builders needing extra SATA ports: If your motherboard's SATA ports are full and you want to add more HDDs or SSDs for storage, this card is a straightforward solution. It works especially well for bulk storage drives.
  • Users with small-form-factor cases: The included low-profile bracket allows installation in Mini-ITX or MicroATX cases where space is tight. As long as a PCIe x1 slot is available, it can fit even behind a graphics card.
  • Home server or NAS builders: The card is recognized as a standard SATA controller by operating systems, making it compatible with FreeNAS, TrueNAS, or Windows Storage Spaces. Since it does not support hardware RAID, software RAID must be used.
    This card is not suitable for users who need hardware RAID or high-bandwidth NVMe expansion. Also, because PCIe 2.0 x1 offers roughly 500MB/s total bandwidth, connecting multiple fast SSDs may cause a bottleneck.

Product Disclosure (Amazon)

  • Manufacturer: IO Crest
  • Seller: Amazon US
  • Fulfilled by: Amazon US
  • Model: SI-PEX40064
  • ASIN: B00AZ9T3OU
  • Note: This article covers a manufacturer-made product based on Amazon listing details.