Samsung 256MB PC1066 ECC RDRAM Memory Kit (2 x 128MB)

Upgrade your compatible vintage desktop or workstation with this genuine Samsung matched pair of high-speed PC1066 Rambus RDRAM modules.

This listing includes two 128MB modules for a total capacity of 256MB.

These modules are ideal for restoring or upgrading compatible Pentium 4-era systems that require 184-pin PC1066 RIMM memory.

Specifications

• Brand: Samsung
• Total Capacity: 256MB
• Capacity per Module: 128MB
• Quantity: 2 Modules (Matched Pair)
• Memory Type: Rambus RDRAM
• Form Factor: 184-Pin RIMM
• Speed: PC1066-32P (1066MHz)
• ECC Memory
• Access Speed: 32ns
• Samsung Part Number: MR18R1624DF0-CT9

Compatible With Many Systems Using PC1066 RDRAM Including

• Dell Dimension 8250
• Dell Dimension 8200
• Dell Precision 340
• Dell Precision 350
• Intel 850 / 850E chipset systems
• Other computers requiring 184-pin PC1066 ECC RDRAM

Please verify compatibility with your motherboard or existing memory before purchasing. RDRAM systems have specific installation requirements, and memory is typically installed in matched pairs.

Condition

• Clean, genuine Samsung memory modules
• Matching pair
• No cracks or physical damage
• Exactly the modules shown in the photographs
• Ships carefully packaged in anti-static protection

What's Included

• (2) Samsung 128MB PC1066 ECC RDRAM Modules
• Total Memory: 256MB

🖥️ PC Compatibility List

These modules are compatible with Intel 850 and 850E chipset-based systems, commonly used with Pentium 4 CPUs between 2002–2003.

✅ Dell Compatible Models:

• Dell Precision Workstation 340

• Dell Dimension 8200

• Dell Dimension 8250

• Dell XPS RDRAM-based editions (2002)

✅ HP / Compaq Compatible Models:

• HP xw4000 Workstation (select configurations)

• HP Workstation x2000/x4000 series

• Compaq Evo W4000

• Compaq AP550 Workstation

✅ IBM Compatible Models:

• IBM IntelliStation M Pro 6850 / Z Pro (Intel 850E chipset)

• IBM NetVista A60 (RDRAM variant)

✅ Gateway Compatible Models:

• Gateway 700XL series

• Gateway Performance 1300 / 1400 (with RDRAM)

✅ Custom-Built and DIY Systems:

Compatible with motherboards featuring Intel 850/850E chipsets, including:

Motherboard BrandCompatible ModelsIntelD850EMV2, D850GBASUSP4T533-C, P4T-EABITTH7-IISupermicroP4STA, P4DP6

These boards support ECC RDRAM and were designed for early Pentium 4 (Socket 478) systems.

Important Compatibility Notes:

• RDRAM must be installed in matched pairs

• Empty RIMM slots require continuity RIMMs (C-RIMMs)

• Not compatible with DDR, DDR2, SDRAM, or modern systems

• ECC modules may not work in non-ECC-only motherboards — check BIOS/motherboard documentation