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Review Summary
Accidents happen where life happens. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failure, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
Our claims process is simple & easy and our customer service team is happy to help.
Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for purchase Internationally or in U.S. Territories.
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PCIe 3.0 x8 (x4 link)
Low Profile and Full Height
32 Degree F to 104 Degree F (0 Degree C to 40 Degree C)
-5 Degree F to 140 Degree F (-20 Degree C to 60 Degree C)
5% to 95% RH
IEEE 802.3ad Link Aggregation
IEEE 802.3ae 10Gbps Ethernet
IEEE 802.3by 25Gbps Ethernet
25 Gbps
TCP Segmentation Offload (TSO), Large Send Offload (LSO), Receive Side Scaling (RSS), Generic Receive Offload (GRO), Generic Segmentation Offload (GSO), 1.5 - 9 KB Jumbo Frame, Offloaded storage over Ethernet, Non-offloaded storage over Ethernet, Auto-negotiation between 10Gb/s and 25Gb/s, TCP/UDP Checksum Offload, Transmit side scaling (TSS)
FS series:FS6400, FS3600, FS3400, FS3017, FS2017, FS1018
SA series:SA3600, SA3400, SA3200D
UC series:UC3200
21 series:RS4021xs+, RS3621xs+, RS3621RPxs, RS1221RP+, RS1221+, DS1821+, DS1621xs+, DS1621+
19 series:RS1619xs+
18 series:RS3618xs, DS3018xs
17 series:RS18017xs+, RS4017xs+, RS3617xs+, RS3617RPxs, DS3617xs
2.72 x 6.61 x 0.68" (69 x 168 x 17.3mm)
846504003839
Maximize Bandwidth for Heavy-Duty Applications
The Synology E25G21-F2 is a dual-port 25GbE SFP28 network interface card that lets you boost network bandwidth and performance. Handle higher quantities of data traffic for increased users and the most data-intensive workloads.
Throughput: Dual-port 25GbE SFP28
Flexibility: Optical SR, Optical LR, and DAC support
Compatibility: Purpose-built for Synology servers
Maximize throughput within minutes
Easy installation
Upgrade Synology systems with faster networking speeds. Thorough validation ensures seamless integration with DSM.
Link Aggregation
Combine the E25G21-F2's two 25GbE ports into a Link Aggregation group to enable higher simultaneous throughput, port failover, and load balancing.
High-performance connectivity upgrade
The E25G21-F2 adapter gives you more connectivity options with support for SR and LR transceivers and DAC options. Dual 25GbE SFP28 ports help remove network bandwidth limitations, while backwards compatibility with 10GbE SFP+ equipment reduces installation and implementation costs. CPU offloading technologies reduce network transfer overhead on the host system's processor to boost system performance