E25G21-F2 Synology E25G21-F2 Network Adapter at discount

E25G21‑F2 Specifications

Synology Dual‑Port 25 GbE SFP28 PCIe Network Adapter

Manufacturer: Synology
Manufacturer Model: E25G21‑F2
Product Line: Synology Network Expansion Cards
Product Series: Dual‑Port 25 GbE (SFP28) Adapter
Product Type: Internal PCIe Network Interface Card (NIC)
Product Name: Synology E25G21‑F2 Dual‑Port 25 GbE Adapter

KEY FEATURES:

Network Ports: 2 × 25 GbE SFP28 — Dual high‑bandwidth connections for heavy‑duty workloads.

Backward Compatibility: Supports 10 GbE SFP+ modules for flexible installation.

Host Bus Interface: PCI Express 3.0 ×8 for high throughput.

Bracket Options: Low‑profile & full‑height included.

Offload Technologies: Reduces CPU overhead during intensive transfers.

Warranty: 5‑year limited warranty.

PERFORMANCE:

Maximum Data Rate: 25 Gbps per port (50 Gbps total, full duplex).

IEEE Standards Compliance:

IEEE 802.3by (25 Gbps Ethernet)

IEEE 802.3ae (10 Gbps Ethernet)

IEEE 802.3ad (Link Aggregation).

Supported Features:

Jumbo Frames (1.5 KB to 9 KB)

TCP/UDP checksum offload

TCP Segmentation Offload (TSO)

Large Send Offload (LSO)

Generic Receive/Segmentation Offload (GRO/GSO)

Receive Side Scaling (RSS)

Transmit Side Scaling (TSS)

Auto‑negotiation between 10 Gb/s and 25 Gb/s.

ENVIRONMENTAL & RELIABILITY:

Operating Temperature: 0 °C to 40 °C (32 °F to 104 °F).

Storage Temperature: ‑20 °C to 60 °C (‑5 °F to 140 °F).

Relative Humidity: 5 % to 95 % RH (non‑condensing).

Designed for enterprise NAS environments with high throughput and reliability.

PHYSICAL:

Form Factor: Internal PCIe expansion card.

Slot Required: PCI Express 3.0 ×8 (compatible with ×8 or ×16 slots).

Dimensions (H × W × D): 69 mm × 168 mm × 17.3 mm.

Typical