🥟 DIMMsum

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 twice daily.

$43.50/GB
median $/GB (single sticks, fixed price)
$0.09/GB
cheapest live $/GB
$4010
cheapest single stick, shipped
29
live listings

Price trend — median $/GB, single sticks: asking prices vs real sold prices

asking — daily median of live listings$25.58$47.53Jul 4 asking: $41.039/GB · 122 listingsJul 5 asking: $41.048/GB · 81 listingsJul 6 asking: $41.048/GB · 81 listingsJul 7 asking: $41.892/GB · 40 listingsJul 8 asking: $41.895/GB · 37 listingsJul 10 asking: $41.913/GB · 33 listingsJul 11 asking: $41.909/GB · 33 listingsJul 12 asking: $41.462/GB · 32 listingsJul 13 asking: $41.909/GB · 33 listingsJul 14 asking: $44.523/GB · 31 listingsJul 15 asking: $44.523/GB · 28 listingsJul 16 asking: $44.523/GB · 28 listingsJul 17 asking: $44.523/GB · 30 listingsJul 18 asking: $43.264/GB · 36 listingsJul 19 asking: $43.259/GB · 36 listingsJul 20 asking: $44.523/GB · 34 listingsJul 21 asking: $44.523/GB · 35 listingsJul 22 asking: $44.523/GB · 34 listingsJul 29 asking: $44.523/GB · 17 listingsJul 30 asking: $44.523/GB · 34 listingsJul 31 asking: $44.523/GB · 34 listingsAug 1 asking: $44.523/GB · 34 listingsAug 2 asking: $44.523/GB · 35 listingsAug 3 asking: $44.523/GB · 34 listingsAug 4 asking: $47.433/GB · 36 listingsAug 5 asking: $47.433/GB · 36 listingsAug 6 asking: $44.523/GB · 38 listingsAug 7 asking: $43.468/GB · 36 listingsAug 8 asking: $43.416/GB · 18 listingsAug 9 asking: $43.479/GB · 18 listingsAug 10 asking: $44.523/GB · 19 listingsAug 11 asking: $47.531/GB · 18 listingsAug 12 asking: $44.523/GB · 19 listingsAug 13 asking: $47.505/GB · 20 listingsAug 14 asking: $47.470/GB · 20 listingsAug 16 asking: $44.523/GB · 19 listingsAug 17 asking: $44.523/GB · 19 listingsAug 18 asking: $44.523/GB · 19 listingsask $44.52Jul 4Aug 18sold — monthly median of completed sales$25.58$47.53May 2026 sold: $25.582/GB · 8 salesJun 2026 sold: $32.422/GB · 8 salessold $32.42May 2026Jun 2026

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

ListingConfigPrice shipped$/GB
New Listing M321RAJA0MB2 Samsung 128GB PC5-6400B RDIMM Server Memory OEM Sealed Lot Of 500
Brand New
500×128GB $5500.00 $0.086
128GB DDR5 RDIMM 6400MHz 4Rank 3DS/TSV RAM Memory for ASUS Pro WS WRX90E-SAGE SE
Brand New
1×128GB $4010.00 $31.328
Kingston 128GB 6400 DDR5 RDIMM ECC CL52 Server Memory KCS-UC564D4-128G
Brand New
1×128GB $4060.05 $31.719
Lot of 8 128GB DDR5 RDIMM 6400MHz 4Rankx4 CE8 RAM Memory for SuperMico X14
Brand New
8×128GB $33709.00 $32.919
Micron 128GB 2Rx4 PC5-6400B DDR5 ECC RDIMM Memory MTC40F2047S1RC64BB1
Brand New
1×128GB $4330.91 $33.835
4 x SK Hynix 128GB DDR5 6400 PC5-51200 RDIMM EC8 RAM Memory (HMCT04AHERA297N)
Pre-Owned
4×128GB $17500.00 $34.180
4 x Micron 128GB DDR5 6400 PC5-51200 RDIMM EC8 RAM Memory (MTC40F2047S1RC64BB1)
Pre-Owned
4×128GB $17999.00 $35.154
MICRON 128GB (1X128GB) 2RX4 PC5-6400B RDIMM SERVER MEMORY MTC40F2047S1RC64BB1
Pre-Owned
1×128GB $4500.00 $35.156
A-Tech 256GB 2x 128GB 2Rx4 PC5-51200R DDR5 6400 MHz EC8 RDIMM Server Memory RAM
Brand New
2×128GB $9679.98 $37.812
128GB DDR5 PC5-51200 RDIMM (Replacement for Samsung M321RAJA0MB2-CCP) Memory RAM
Brand New
1×128GB $4839.99 $37.812
A-Tech 128GB 2Rx4 PC5-51200R DDR5 6400 MHz EC8 RDIMM 288-Pin Server Memory RAM
Brand New
1×128GB $4839.99 $37.812
A-Tech 512GB 4x 128GB 2Rx4 PC5-51200R DDR5 6400 MHz EC8 RDIMM Server Memory RAM
Brand New
4×128GB $19359.96 $37.812
Hynix 128GB DDR5-6400 PC5-51200 2Rx4 EC8 RDIMM Server Memory RAM HMCT04MHBRC470N
Open Box
1×128GB $4839.99 $37.812
Micron 128GB DDR5-6400 PC5-51200 EC8 RDIMM Server Memory RAM MTC40F2047S1RC64BB1
Open Box
1×128GB $4900.49 $38.285
128GB DDR5 RDIMM 6400MHz 4Rank 3DS/TSV RAM Memory for ASUS Pro WS WRX90E-SAGE SE
Brand New
1×128GB $5338.40 $41.706
Lot of 8 128GB DDR5 RDIMM 6400MHz 4Rankx4 CE8 RAM Memory for SuperMico X14
Brand New
8×128GB $43348.17 $42.332
SAMSUNG DDR5 EC8 RDIMM 128GB 2Rx4 PC5-6400B-RA1-1211-XT M321RAJA0MB2-CCPKC
New (Other)
1×128GB $5436.74 $42.475
SAMSUNG 128GB 6400MHz DDR5 RAM EC8 RDIMM 2Rx4 PC5-6400B-RA1-1211-XT
Open Box
1×128GB $5699.00 $44.523
256GB (2x128GB) ECC Registered DDR5 6400MT/s PC5-51200R Server Memory Kit
Brand New
2×128GB $11990.00 $46.836
512GB (4x128GB) ECC Registered DDR5 6400MT/s PC5-51200R Server Memory Kit
Brand New
4×128GB $23980.00 $46.836
MTC40F2047S1RC64BB1 Micron 128GB DDR5-6400MHz PC5-51200 ECCReg RDIMM CL52 Memory
Pre-Owned
1×128GB $6469.00 $50.539
Micron DDR5 ECC RDIMM 128GB 2RX4 PC5-6400B-RAA-1211-XT
New (Other)
1×128GB $6478.04 $50.610
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
Open Box
1×128GB $6499.00 $50.773
M321RAJA0MB2-CCP SAMSUNG 128GB (1X128GB) 2RX4 PC5-6400B RDIMM SERVER MEMORY
Brand New
1×128GB $6599.00 $51.555
NEW MTC40F2047S1RC64BB1 MICRON 128GB (1X128GB) 2RX4 PC5-6400B RDIMM MEMORY
Brand New
1×128GB $6599.00 $51.555
M321RAJA0MB2-CCP Samsung 128GB DDR5-6400MHz PC5-51200 RDIMM CL52 ECC Reg Memory
Brand New
1×128GB $7575.00 $59.180
** MTC40F2047S1RC64BB1 Micron 128GB PC5-51200 DDR5-6400MHz ECC RDIMM 2Rx4 RAM **
Brand New
1×128GB $7608.00 $59.438
SK hynix HMCT04MHBRC554N 128GB DDR5-6400 ECC Registered RDIMM Server Memory
Brand New
1×128GB $9929.00 $77.570

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

📬 Monthly used-RAM market report — median sold prices by spec, movers, and the best current deals. One email a month, nothing else.