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 10Gb Ethernet Adapter 1 RJ45 Port (E10G18-T1)

Synology 10Gb Ethernet Adapter 1 RJ45 Port (E10G18-T1)

Product ID: 257379865

Details

Brand
Synology
Colour
Silver
Compatible devices
Desktop
Hardware interface
Ethernet
Product dimensions
8.6L x 6.8W x

⚡10Gbps blazing speed

🔄Auto-negotiation across 5 speeds

🛡️5-year warranty peace of mind

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Description

⚡ Upgrade your network, upgrade your hustle.

BLAZING 10 GB E SPEED - Experience ultra-fast data transfers that keep your workflow lightning quick.
COMPACT SLEEK DESIGN - A slim, silver profile that fits perfectly into any professional desktop setup.
ROCK SOLID RELIABILITY - Backed by a 5-year warranty, ensuring your investment is future-proof and worry-free.
PLUG AND PLAY RJ 45 CONNECTOR - Integrate smoothly with your existing Ethernet infrastructure—no rewiring needed.
SEAMLESS BACKWARD COMPATIBILITY - Effortlessly connect at 10Gbps, 5Gbps, 2.5Gbps, 1Gbps, or 100Mbps without missing a beat.

The Synology E10G18-T1 is a high-performance 10Gb Ethernet adapter featuring a single RJ-45 port, supporting IEEE 802.3an/BZ standards. It offers seamless auto-negotiation across multiple speeds (10Gbps down to 100Mbps), ensuring compatibility with existing network setups. Designed for professionals seeking ultra-fast, reliable connectivity, it comes with a 5-year warranty and a compact form factor ideal for desktop integration.

Specifications

ASIN	B07G9N9KJT
Best Sellers Rank	#44,540 in Computers ( See Top 100 in Computers ) #95 in Network Cards
Brand	Synology
Built-In Media	1 x E10G18-T1
Color	Silver
Compatible Devices	Desktop
Compatible Operating System Family	Linux
Customer Reviews	4.6 4.6 out of 5 stars (356)
Data Link Protocol	Ethernet, IEEE 802.3
Data Transfer Rate	6 Gigabits Per Second
External Testing Certification	Não aplicável
Global Trade Identification Number	00846504003105
Hardware Interface	Ethernet
Item Dimensions L x W x H	8.6L x 6.8W x 1.4H centimeters
Item Type Name	Synology 10Gb Ethernet Adapter 1 RJ45 Port (E10G18-T1)
Item Weight	0.14 Pounds
Manufacturer	Synology
Mfr Part Number	E10G18-T1
Model Number	E10G18-T1
UPC	846504003105

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