Can I also use one in my computer?

TL;DR: Yes, you may use this card in your computer, but you will need to locate the correct driver. Long answer: Synology re-brands an OEM card, and you can search for those OEM drivers. The reason this card exists is so Synology can mark-up the price, as they only support their own brand in their NAS products. Some people are obsessed with protecting warranty compliance, particularly in the business world. So you would be better served finding another card. Good luck

Any alternative 10gb cards for ds1621+/ds1821+? because honestly those synology are priced way too high.

If you want both 10G network and M.2 slots, this E10M20-T from Synology with NOT work in the DS1817+ I am positive, and I suspect it would not work in the DS1621+ either....but if you go to synology website, it lists the compatible systems that it works in right there in the specs for the card. Unfortunately, I did not read that before hand...so I bought this for my DS1817+, but the m.2 slots don't work (the 10g port does though). If you want just 10g network ports...the X540-T2 works perfectly in my ds1817+ and ds1821+; you don't need the Intel version either. I have the 10Gtek version I bought here on Amazon and it works perfectly. No need to buy the Synology brand. https://www.amazon.com/dp/B01HMGWOU8?ref=ppx_yo2ov_dt_b_product_details&th=1

Does this work with my Synology DS418j?

It is not listed in the optional accessories section of DS418j in the product specs page. So I bet it will not work or it is not possible to attach one.

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Synology E10G18-T1 - Network adapter - PCIe 3.0 x4 low profile - 10Gb Ethernet x 1 - for Disk Station DS1618, RackStation RS1219, RS2418, RS2818, RS3618, RS818,RJ-45; 1 port

Product ID: 102235463

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Details

Brand
Synology
Hardware interface
Ethernet
Colour
Black
Compatible devices
Desktop Laptop
Product dimensions
8.6L x 6.8W x
Data link protocol
Ethernet

⚡10Gbps blazing speed

💾PCIe 3.0 x4 interface

🔄Auto-negotiation multi-speed

Description

🚀 Upgrade your NAS to lightning-fast 10GbE — because speed waits for no one!

BLAZING 10 GB E SPEED - Experience ultra-fast data transfers up to 10Gbps, eliminating network bottlenecks for your Synology NAS.
JUMBO FRAME SUPPORT - Supports 9KB jumbo frames to optimize large data packet transfers and reduce CPU load.
PLUG PLAY PC IE 3 0 X 4 - Low-profile design with PCIe 3.0 x4 interface for effortless installation and maximum throughput.
FUTURE PROOF YOUR NETWORK - Flexible 10GBASE-T/NBASE-T support keeps your infrastructure ready for tomorrow’s data demands.
SEAMLESS MULTI SPEED COMPATIBILITY - Auto-negotiates between 100Mbps and 10Gbps, ensuring smooth integration with existing network setups.

The Synology E10G18-T1 is a compact, single-port 10Gb Ethernet PCIe 3.0 x4 network adapter designed for Synology DiskStation and RackStation models. It supports IEEE 802.3an/bz standards with backward compatibility from 100Mbps up to 10Gbps, featuring jumbo frame support and auto-negotiation for seamless integration with existing networks. Ideal for small businesses and home users seeking to eliminate data transfer bottlenecks and future-proof their network infrastructure.

Specifications

Brand	Synology
Product Dimensions	8.61 x 6.81 x 1.37 cm; 64.86 g
Item model number	E10G18-T1
Manufacturer	Synology
Series	E10G18-T1
Colour	Black
Hard Disk Description	Mechanical Hard Disk
Hard Drive Interface	Serial ATA
Power Source	AC/DC
Operating System	Windows 10
Are Batteries Included	No
Item Weight	64.9 g
Guaranteed software updates until	unknown

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