8GB DDR4-2666 UDIMM — used server RAM prices

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. 8GB 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 median comes from single-stick, fixed-price listings only, so multi-stick lots and auction bids can't skew it. Refreshed from live eBay listings twice daily.

$16.24/GB

median $/GB (single sticks, fixed price)

$5.07/GB

cheapest live $/GB

$42

cheapest single stick, shipped

133

live listings

Price trend — median $/GB, single sticks

Price history builds with every scrape — this chart fills in as DIMMsum keeps watching the market.

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

Listing	Config	Price shipped	$/GB
New Listing {4x} SK Hynix 8GB DDR4 RAM 1Rx8 PC4-2666V-ED2-11 ECC UDIMM HMA81GU7CJR8N-VK Pre-Owned	4×8GB	$162.32	$5.073
SK Hynix 8GB 1Rx8 PC4-2666V-ED2-11 ECC Unbuffered Memory P/N: HMA81GU7CJR8N-VK Pre-Owned	1×8GB	$41.99	$5.249
New Listing {2x} SK Hynix 8GB DDR4 RAM 1Rx8 PC4-2666V-ED2-11 ECC UDIMM HMA81GU7CJR8N-VK Pre-Owned	2×8GB	$87.32	$5.458
Synology 8GB DDR4-2666 ECC UDIMM RAM Pre-Owned	1×8GB	$45.17	$5.646
8GB 1Rx8 PC4-2666V-ED2-11 ECC UDIMM Server RAM HMA81GU7DJR8N-VK SK Hynix Pre-Owned	1×8GB	$51.34	$6.418
4 LOT SK Hynix 8GB 1Rx8 PC4-2666V-ED2-11 ECC Unbuffered Server HMA81GU7CJR8N-VK Pre-Owned	4×8GB	$251.90	$7.872
NVTEK 8GB (1X8GB) DDR4 2666MHZ PC4-21300 1Rx8 1.2V CL19 288-PIN N0N-ECC UDIMM Brand New	1×8GB	$65.99	$8.249
Micron 8GB DDR4 2666 ECC UDIMM RAM 1Rx8 PC4-21300 MTA9ASF1G72AZ-2G6E1 288pin Pre-Owned	1×8GB	$69.40	$8.675
Synology 8GB DDR4 2666 MHz ECC UDIMM RAM NAS Server Memory Open Box	1×8GB	$70.00	$8.750
Samsung 8GB DDR4 2666 MHz PC4-21300 ECC Unbuffered DIMM 1Rx8 Server Memory RAM Pre-Owned	1×8GB	$73.00	$9.125
Samsung 8GB DDR4 2666 ECC UDIMM RAM PC4-2666V-ED2 M391A1K43BB2-CTD for DELL HP Pre-Owned	1×8GB	$73.00	$9.125
OWC 64GB (8x8GB) DDR4 2666MHz 1Rx8 ECC Unbuffered UDIMM 288pin Memory RAM Brand New	8×8GB	$593.92	$9.280
OWC 32GB (4x8GB) DDR4 2666MHz 1Rx8 ECC Unbuffered UDIMM 288pin Memory RAM Brand New	4×8GB	$297.71	$9.303
OWC 16GB (2x8GB) DDR4 2666MHz 1Rx8 ECC Unbuffered UDIMM 288pin Memory RAM Brand New	2×8GB	$149.83	$9.364
OWC 8GB DDR4 2666MHz 1Rx8 ECC Unbuffered UDIMM 288pin Memory RAM Brand New	1×8GB	$74.99	$9.374
4ZC7A08696 8GB ECC UDIMM DDR4-2666 PC4-21300 Memory Lenovo ThinkSystem System Brand New	1×8GB	$77.00	$9.625
16GB 2x8GB DDR4-2666MHz ECC UDIMM CT16G4WFD8266 Compatible Replacement RAM Brand New	2×8GB	$156.00	$9.750
NEW SNPD715XC/8G AA335287 Dell 8GB 1RX8 DDR4 PC4-2666 ECC UDIMM Server Memory Brand New	1×8GB	$78.88	$9.860
NEW SNPD715XC/8G AA335287 Dell 8GB 1RX8 DDR4 PC4-2666 ECC UDIMM Server Memory Brand New	1×8GB	$79.88	$9.985
Synology 8GB DDR4-2666 ECC UDIMM PC4-21300 NAS Server Memory D4EC-2666-8G - Good Pre-Owned	1×8GB	$79.99	$9.999
D4EU01-8G 8GB DDR4-2666 ECC UDIMM RAM Replacement Synology FlashStation FS2500 Brand New	1×8GB	$80.00	$10.000
3TQ39AA 8GB ECC UDIMM DDR4-2666 PC4-21300 Memory for HP Z2 Tower G4 Workstation Brand New	1×8GB	$80.00	$10.000
MEM-DR480L-HL01-EU26 8GB ECC UDIMM DDR4-2666 PC4-21300 Memory Compatible Brand New	1×8GB	$80.00	$10.000
8GB 1Rx8 PC4-2666 ECC UDIMM Supermicro 110C-FHN4T 510T-ML Memory RAM Brand New	1×8GB	$84.78	$10.598
SK Hynix 8GB DDR4 2666 ECC UDIMM RAM 1Rx8 PC4-21300 HMA81GU7CJR8N-VK 288pin Pre-Owned	1×8GB	$86.50	$10.813
Samsung 8GB 1Rx8 PC4-2666V-E DDR4 UDIMM ECC Memory M391A1K43BB2-CTDQ Pre-Owned	1×8GB	$87.59	$10.949
NEW 879505-B21 879526-091 HPE 8GB 1RX8 DDR4 PC4-2666 UDIMM ECC Server RAM Memory Brand New	1×8GB	$88.88	$11.110
SK Hynix 8GB DDR4 2666 ECC UDIMM RAM 1Rx8 PC4-21300 288p for HP DELL Lenovo Acer Pre-Owned	1×8GB	$89.20	$11.150
NEW 879505-B21 879526-091 HPE 8GB 1RX8 DDR4 PC4-2666 UDIMM ECC Server RAM Memory Brand New	1×8GB	$89.88	$11.235
Synology 8GB DDR4-2666 ECC UDIMM RAM Open Box	1×8GB	$90.00	$11.250
Synology RAM DDR4-2666 ECC UDIMM 8GB (D4EC-2666-8G) for Synology NAS servers Open Box	1×8GB	$90.99	$11.374
32GB 4x8GB DDR4-2666MHz ECC UDIMM RAM Replacement Synology RackStation RS Series Brand New	4×8GB	$375.00	$11.719
16GB 2x 8GB 1Rx8 PC4-21300 DDR4 2666 MHz ECC UNB UDIMM Server Memory RAM Brand New	2×8GB	$189.00	$11.813
32GB (4x8GB) DDR4 2666MHz PC4-21300 288-PIN ECC UDIMM SERVER/WORKSTATION RAM KIT Brand New	4×8GB	$378.15	$11.817
Samsung 8GB DDR4 2666 ECC UDIMM RAM PC4-2666V Open Box	1×8GB	$95.00	$11.875
16GB (2x8GB) DDR4 2666MHz PC4-21300 288-PIN ECC UDIMM SERVER/WORKSTATION RAM KIT Brand New	2×8GB	$195.75	$12.234
SNPY7N41C/8G - Dell Compatible 8GB PC4-21300 DDR4-2666MHz 1Rx8 1.2V ECC UDIMM Brand New	1×8GB	$98.40	$12.300
879505-B21 - HP Compatible 8GB PC4-21300 DDR4-2666MHz 1Rx8 1.2V ECC UDIMM Brand New	1×8GB	$98.40	$12.300
879526-091 - HPE Compatible 8GB PC4-21300 DDR4-2666Mhz 1Rx8 1.2v ECC UDIMM Brand New	1×8GB	$98.40	$12.300
840755-091 - HP Compatible 8GB PC4-21300 DDR4-2666MHz 1Rx8 1.2V ECC UDIMM Brand New	1×8GB	$98.40	$12.300
SNPD715XC/8G - Dell Compatible 8GB PC4-21300 DDR4-2666MHz 1Rx8 1.2V ECC UDIMM Brand New	1×8GB	$98.40	$12.300
A9845650 - Dell Compatible 8GB PC4-21300 DDR4-2666MHz 1Rx8 1.2V ECC UDIMM Brand New	1×8GB	$98.40	$12.300
3TQ39AA - HP Compatible 8GB PC4-21300 DDR4-2666Mhz 1Rx8 1.2v ECC UDIMM Brand New	1×8GB	$98.40	$12.300
4X70Z50946 - Lenovo Compatible 8GB PC4-21300 DDR4-2666Mhz 1Rx8 1.2v ECC UDIMM Brand New	1×8GB	$98.40	$12.300
3TQ39AT - HP Compatible 8GB PC4-21300 DDR4-2666MHz 1Rx8 1.2V ECC UDIMM Brand New	1×8GB	$98.40	$12.300
4UY11UT - HP Compatible 8GB PC4-21300 DDR4-2666MHz 1Rx8 1.2V ECC UDIMM Brand New	1×8GB	$98.40	$12.300
4X70S69155 - Lenovo Compatible 8GB PC4-21300 DDR4-2666Mhz 1Rx8 1.2v ECC UDIMM Brand New	1×8GB	$98.40	$12.300
Samsung 8GB DDR4 2666 MHz PC4-21300 ECC Unbuffered DIMM 1Rx8 Server Memory RAM Open Box	1×8GB	$99.00	$12.375
8GB 1Rx8 PC4-21300 ECC UDIMM (HPE 879526-091 Equivalent) DDR4 Server Memory RAM Brand New	1×8GB	$99.00	$12.375
Micron 8GB DDR4-2666 PC4-21300 ECC UDIMM Server Memory RAM Open Box	1×8GB	$99.00	$12.375

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

8GB DDR4-2666 UDIMM — used server RAM prices

Price trend — median $/GB, single sticks

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

8GB DDR4 UDIMM at other speeds

Other DDR4-2666 UDIMM capacities