This article covers 【10GbE-NIC + M.2 SSD コンボアダプタ】 Synology E10M20-T1 [10GbE.

Overview

The Synology E10M20-T1 is a combo expansion card designed for select Synology NAS models, combining a 10GbE RJ-45 network interface with dual M.2 NVMe SSD slots in a single PCIe 3.0 x8 card. This allows you to add high-speed networking and SSD caching without occupying multiple expansion slots. The 10GbE port delivers up to 10 Gbps over standard Cat6a cabling, while the two M.2 slots (supporting 2280 and 22110 form factors) can be used for read/write cache or as dedicated storage volumes, depending on DSM configuration.

Connectivity & Compatibility

The card uses a PCIe 3.0 x8 host interface and is compatible only with specific Synology NAS models, including the SA3600, SA3400, RS820RP+, RS820+, DS2419+, DS1819+, RS2818RP+, DS3018xs, and DS1618+. It is not a universal PCIe card for standard PCs. The M.2 slots support NVMe SSDs only (no SATA M.2). For 10GbE networking, a Cat6a or higher Ethernet cable is recommended. The card includes a low-profile bracket for installation in compact NAS chassis.

Product Info

Released around 2020, the E10M20-T1 is positioned as a mid-to-high-end accessory for Synology's business and prosumer NAS lineup. It carries a standard two-year warranty when purchased through authorized channels. The package includes the card, a low-profile bracket, and a quick installation guide. SSDs and network cables are sold separately. At around ¥47,300 ( Japan), it is more expensive than a standalone 10GbE NIC, but the inclusion of dual M.2 slots makes it a space-efficient solution for users who need both high-speed networking and SSD caching.

Best Use Cases

  • Building a 10GbE NAS environment: If your Synology NAS supports this card, you can upgrade to 10GbE networking and add NVMe caching simultaneously. Ideal for small offices with multiple users accessing large files. - Improving NAS responsiveness with NVMe cache: For NAS used as a database server or VM host, adding NVMe cache drastically reduces latency. The dual M.2 slots allow RAID1 cache configurations for redundancy. - Maximizing limited PCIe slots: In NAS models with only one PCIe slot, this combo card is the only way to get both 10GbE and M.2 expansion. However, compatibility is strictly limited to the listed models, so check your NAS model before purchasing.

Product Disclosure (Amazon)

  • Manufacturer: Synology
  • Seller: イートレンド [適格請求書発行事業者登録済]
  • Fulfilled by: イートレンド [適格請求書発行事業者登録済]
  • ASIN: B089RHK7CF
  • Note: This article covers a manufacturer-made product based on Amazon listing details.