DDR5 RDIMM 128GB · 6400 MT/s

Current asking prices

Median asking price

$6,590

Observed range

$5,324–$9,929

7 listings· 6 sellers· Updated Sep 7, 2026

Market signals

Derived from observed listings across all SKUs in this class.

▶What do OEM / Original / Compatible mean?

OEMCertified by a server vendor (Dell, HPE, Lenovo). May carry firmware locks and qualifications. Priced higher for vendor support and warranty alignment.

OriginalThe underlying component manufacturer's part, without OEM server-vendor branding or firmware lock. Typically the market pricing reference — platform compatibility should still be verified.

CompatibleThird-party alternatives meeting the same spec. Often 15–40% cheaper. May trigger vendor warnings on OEM-locked platforms — verify before substituting.

Market Spread

60%

Wide spread. Market is fragmented or condition differences are significant.

Liquidity

Medium

7 samples. Reasonable basis for price benchmarking.

▶What do the signal colors mean?

Favorable — Tight spread, meaningful discount, or strong liquidity.

Neutral — Normal market conditions. No action flag.

Investigate — Wide spread, inverted pricing, or low sample count.

High alert — Very wide spread or significant price anomaly.

Insufficient — Too few samples to produce a reliable signal.

Market price confidence

The figures below reflect observed market pricing across multiple sellers and SKUs. Ranges and typical bands help distinguish outliers from defensible market prices.

OEM

Confidence: low

OEM pricing is typically negotiated directly with vendors and is not reflected in spot market listings.

Original

Confidence: medium

$5323.99 – $8052

Typical market band

Observed range: $5323.99 – $9929
Median: $6589.99
7 listings • 2 SKU(s)

Compatible

Confidence: low

Pricing inferred from adjacent market tiers

OEM and original parts are rarely transacted directly in open markets.

How to interpret this

Prices within the typical market band represent common, defensible market rates.
Listings near the lower bound may reflect limited stock, condition differences, or less-established sellers.
Prices above the typical band often reflect vendor qualification, warranty, or support premiums.

Known part numbers in this market

2 part numbers tracked. Not a guarantee of compatibility — verify against your platform.

Manufacturer	MPN	Certification
Samsung	M321RAJA0MB2-CCP	Original	View SKU →
SK Hynix	HMCT04MHBRC	Original	View SKU →

▶How to read OEM, Original, and Compatible

OEM parts carry vendor certification (and often firmware locks) — highest support assurance, highest price. Original parts are the underlying manufacturer's modules without OEM branding — usually the best balance of cost and compatibility. Compatible parts are third-party alternatives — lower cost, but verify against your platform's policies first.

Read the full pricing methodology →

Technical specifications

Parts grouped into this market share these core specifications. Exact manufacturer, branding, and warranty terms vary by SKU — see the part numbers below.

DDR generation

DDR5

Form factor

RDIMM

Capacity

128 GB

Speed

6400 MT/s

ECC

Yes

Status

active

Emerging high-speed tier

Data Sources

Aggregate market metrics may incorporate public market observations. MSI does not publicly identify those sources unless an authorized data relationship exists.

Signals are observations from available data at a point in time — not advice. Verify independently before transacting. Disclaimer

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Nearby memory markets

Closely related server memory markets — nearby speeds and capacities.

DDR5 RDIMM 128GB · 5600 MT/s→DDR5 RDIMM 128GB · 4800 MT/s→DDR5 RDIMM 96GB · 6400 MT/s→DDR5 RDIMM 64GB · 6400 MT/s→DDR5 RDIMM 48GB · 6400 MT/s→DDR5 RDIMM 32GB · 6400 MT/s→DDR5 RDIMM 256GB · 6400 MT/s→DDR5 LRDIMM 128GB · 4800 MT/s→

Browse all server memory markets →