128GB DDR5-6400 RDIMM — used server RAM prices

Registered ECC memory (RDIMM) rated at 6400 MT/s — sellers also list this speed as PC5-51200. 128GB sticks fit current DDR5 server platforms (Xeon Scalable Sapphire Rapids and later, EPYC Genoa and later). 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 every 6 hours.

$41.89/GB

median $/GB (single sticks, fixed price)

$30.67/GB

cheapest live $/GB

$3926

cheapest single stick, shipped

live listings

Price trend — daily median $/GB, single sticks

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

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

Listing	Config	Price shipped	$/GB
128GB DDR5 RDIMM 6400MHz 4Rank 3DS/TSV RAM Memory for ASUS Pro WS WRX90E-SAGE SE Opens in a new window or tab Brand New	1×128GB	$3926.00	$30.672
Lot of 8 128GB DDR5 RDIMM 6400MHz 4Rankx4 RAM Memory ASUS Pro WS WRX90E-SAGE SE Opens in a new window or tab Brand New	8×128GB	$31408.00	$30.672
Kingston 128GB DDR5-6400 CL52 ECC RDIMM Server Memory KCS-UC564D4-128G Opens in a new window or tab Brand New	1×128GB	$4003.67	$31.279
LOT OF 4 MTC40F2047S1RC64BB1 Micron 128GB DDR5-6400MHz ECC RDIMM 2Rx4 Memory Opens in a new window or tab Pre-Owned	4×128GB	$16200.00	$31.641
MTC40F2047S1RC64BB1 Micron 128GB PC5-51200 DDR5-6400MHz ECC RDIMM 2Rx4 Memory Opens in a new window or tab Pre-Owned	1×128GB	$4095.00	$31.992
MICRON 128GB (1X128GB) 2RX4 PC5-6400B RDIMM SERVER MEMORY MTC40F2047S1RC64BB1 Opens in a new window or tab Pre-Owned	1×128GB	$4199.00	$32.805
Micron 128GB 2Rx4 PC5-6400B DDR5 ECC RDIMM Memory MTC40F2047S1RC64BB1 Opens in a new window or tab Brand New	1×128GB	$4340.19	$33.908
MTC40F2047S1RC64BB1 MICRON 128GB (1X128GB) 2RX4 PC5-6400B RDIMM MEMORY Opens in a new window or tab Pre-Owned	1×128GB	$4599.00	$35.930
Micron DDR5 ECC RDIMM 128GB 2RX4 PC5-6400B-RAA-1211-XT Opens in a new window or tab New (Other)	1×128GB	$4906.47	$38.332
Micron DDR5 ECC RDIMM 128GB 2RX4 PC5-6400B-RAA-1211-XT Opens in a new window or tab Open Box	1×128GB	$4950.00	$38.672
Lot of 8 128GB DDR5 RDIMM 6400MHz 4Rankx4 RAM Memory ASUS Pro WS WRX90E-SAGE SE Opens in a new window or tab Brand New	8×128GB	$40589.91	$39.639
MTC40F2047S1RC64BB1 Micron 128GB DDR5-6400MHz PC5-51200 ECCReg RDIMM CL52 Memory Opens in a new window or tab Pre-Owned	1×128GB	$5100.00	$39.844
MICRON 128GB DDR5 6400MHz PC5-51200 CL52 2Rx4 ECC RDIMM Opens in a new window or tab Open Box	1×128GB	$5249.99	$41.016
128GB DDR5 RDIMM 6400MHz 4Rank 3DS/TSV RAM Memory for ASUS Pro WS WRX90E-SAGE SE Opens in a new window or tab Brand New	1×128GB	$5254.16	$41.048
Brand New Hynix HMCT04MHBRC 128GB DDR5-6400 ECC RDIMM Server RAM (READY STOCK) Opens in a new window or tab Brand New	1×128GB	$5350.00	$41.797
SAMSUNG DDR5 EC8 RDIMM 128GB 2Rx4 PC5-6400B-RA1-1211-XT M321RAJA0MB2-CCPKC Opens in a new window or tab New (Other)	1×128GB	$5374.25	$41.986
SAMSUNG DDR5 EC8 RDIMM 128GB 2Rx4 PC5-6400B-RA1-1211-XT M321RAJA0MB2-CCPKC Open Box	1×128GB	$5699.00	$44.523
SAMSUNG 128GB 6400MHz DDR5 RAM EC8 RDIMM 2Rx4 PC5-6400B-RA1-1211-XT Open Box	1×128GB	$5699.00	$44.523
SAMSUNG 128GB DDR5 6400 EC8 RDIMM 2Rx4 PC5-6400B-RA1-1211-XT M321RAJA0MB2-CCPKC Opens in a new window or tab Open Box	1×128GB	$5699.00	$44.523
SAMSUNG 128GB 6400MHz DDR5 RAM EC8 RDIMM 2Rx4 PC5-6400B-RA1-1211-XT Open Box	1×128GB	$5699.00	$44.523
Brand New Samsung M321RAJA0MB2-CCP 128GB DDR5-6400 ECC RDIMM Server RAM Opens in a new window or tab Brand New	1×128GB	$5937.50	$46.387
256GB (2x128GB) ECC Registered DDR5 6400MT/s PC5-51200R Server Memory Kit Opens in a new window or tab Brand New	2×128GB	$11990.00	$46.836
512GB (4x128GB) ECC Registered DDR5 6400MT/s PC5-51200R Server Memory Kit Opens in a new window or tab Brand New	4×128GB	$23980.00	$46.836
Micron 128GB DDR5 6400MHz ECC RDIMM 128GB 2RX4 PC5-6400B-RAA-1211-XT Open Box	1×128GB	$6499.00	$50.773
Micron DDR5 ECC RDIMM 128GB 2RX4 PC5-6400B-RAA-1211-XT Opens in a new window or tab Open Box	1×128GB	$6499.00	$50.773
Micron 128GB DDR5 6400MHz ECC RDIMM 128GB 2RX4 PC5-6400B-RAA-1211-XT Opens in a new window or tab Open Box	1×128GB	$6499.00	$50.773
M321RAJA0MB2-CCP SAMSUNG 128GB (1X128GB) 2RX4 PC5-6400B RDIMM SERVER MEMORY Opens in a new window or tab Brand New	1×128GB	$6599.00	$51.555
M321RAJA0MB2-CCP Samsung 128GB DDR5-6400MHz PC5-51200 RDIMM CL52 ECC Reg Memory Opens in a new window or tab Brand New	1×128GB	$8009.00	$62.570
Crucial 128GB DDR5 RDIMM 2Rx4 6400 CL52 (32Gbit) (Single Pack) Opens in a new window or tab Brand New	1×128GB	$9616.31	$75.127

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

128GB DDR5 RDIMM at other speeds

Other DDR5-6400 RDIMM capacities

64GB DDR5-6400 RDIMM · $37.10/GB