16GB DDR4-2666 UDIMM — used server RAM prices

As of October 19, 2026, a used 16GB DDR4-2666 UDIMM costs $9.06/GB shipped ($145 a stick) at the low end of eBay's market: one in ten of the 146 live single-stick listings ask that or less. The median ask is $11.80/GB. The low end was $9.16/GB on Sep 4, so it's down 1% since.

Unbuffered ECC memory (ECC UDIMM — the ECC that fits desktop-socket boards, not interchangeable with RDIMMs) rated at 2666 MT/s — sellers also list this speed as PC4-21300 or 2666V. 16GB sticks fit DDR4 ECC-capable desktop-socket boards (AM4 Ryzen on ASRock/ASUS boards and Ryzen PRO, Xeon E3 v5/v6 and E-2100/E-2200, C236/C246, and NAS units like Synology/QNAP). Prices below include shipping. The low end is the 10th-percentile ask: one in ten single-stick listings ask that much per GB or less, so it's a price you can find near the top of a search sorted by price. It and the median come from single-stick, fixed-price listings only, so multi-stick lots and auction bids can't skew them. Refreshed from live eBay listings twice daily.

Price trend — $/GB, single sticks

50 cheapest live listings (fixed price, parts-only excluded)

eBay affiliate disclosure: The listing links below lead to eBay. DIMMsum may earn a commission if you make a purchase.

Compare interactively on the live $/GB scatter — median market lines, Pareto frontier, and every spec side by side.

16GB DDR4 UDIMM at other speeds

• 16GB DDR4-2133 UDIMM · low end $7.81/GB
• 16GB DDR4-2400 UDIMM · low end $8.30/GB
• 16GB DDR4-2933 UDIMM · low end $9.37/GB
• 16GB DDR4-3200 UDIMM · low end $9.81/GB

Other DDR4-2666 UDIMM capacities

• 8GB DDR4-2666 UDIMM · low end $9.60/GB
• 32GB DDR4-2666 UDIMM · low end $8.75/GB