Written 22 Aug 2026. Specs from the maker pages linked below. Prices from those stores. I haven't used these.
Connect a 10G NAS and four faster PCs without a used Cisco chassis: QNAP QSW-2104-2S
Connect a 10G NAS and four faster PCs without putting a used Cisco chassis in the closet. The QSW-2104-2S is a fanless unmanaged box for that job.
US SKU: QSW-2104-2S-US / QSW-2104-2S-A-US. Two 10G SFP+ plus four 2.5G RJ45. Maker max 12 W. Fanless ventilated metal. Class B. Distinct from the CRS305 (SFP+ only) and from the 8-port 2.5G unmanaged myth post. The 8-port copper shopping list is still 2.5G switch.
Amazon ASIN B0BFC6QFRL snap $116. B&H listing $79.99 (was $129.99, $50 off) when fetched. Older Amazon ASIN B09B9CJQ2D exists for the same model family. Confirm the US letter suffix.
What to buy
| Box | What it is | Street, 22 Aug 2026 | Buy if |
|---|---|---|---|
| QNAP QSW-2104-2S | 2× 10G SFP+ + 4× 2.5G, unmanaged, fanless, 12 V / 1 A, max 12 W, 2-year. | Amazon B0BFC6QFRL snap $116. B&H $79.99 when fetched. | NAS on a 10G DAC, four 2.5G endpoints, no VLAN tax. New. Not a used Cisco 10G chassis. |
| MikroTik CRS305-1G-4S+IN | 4× SFP+ only. SwOS/RouterOS. Fanless. | Maker $149 / Amazon ~$136. | Every hop is already SFP+. |
Skip
Skip the used Cisco 10G Catalyst / Nexus for this mix of ports. Skip expecting lifetime paper. QNAP is two years on the hardware spec. Skip a random used optic; buy a new DAC in DAC + named X710. The used-vs-new heater test is still here.
Sources
QNAP QSW-2104-2S hardware spec (12 W, 12 V / 1 A, fanless, 2-year). Amazon B0BFC6QFRL. B&H 1733420-REG. Street moves.