Samsung MR16R1624DF0-CM8 128MB RDRAM RIMM PC800-40 800MHz Memory Module

Samsung MR16R1624DF0-CM8 128MB RDRAM RIMM PC800-40 800MHz Memory Module

This Samsung MR16R1624DF0-CM8 is a 128MB RDRAM (Rambus DRAM) RIMM module rated at PC800-40 (800MHz). It carries Samsung's silver inline heat spreader — a standard feature of RDRAM modules, which run notably warmer than conventional DRAM and include a "HOT SURFACE" warning label. The part number, capacity, and speed rating are clearly printed on the label and confirmed in the photos.

Specifications & What's Included

• Manufacturer: Samsung
• Part Number: MR16R1624DF0-CM8
• Capacity: 128MB
• Memory Type: RDRAM (Rambus DRAM)
• Form Factor: RIMM (Rambus Inline Memory Module)
• Speed: PC800-40 (800MHz bus)
• Country of Manufacture: South Korea
• Date Code: 0325
• Heat spreader: Silver metal inline spreader (standard for RDRAM)
• Quantity: 1 module

Applications

RDRAM was Intel's high-bandwidth memory technology of the early 2000s, used exclusively with certain Pentium 4-era chipsets — most notably the Intel 820, 840, 850, and 850E. Systems built on these chipsets require RIMM modules and cannot use standard SDRAM or DDR; RDRAM and RIMM slots are not interchangeable with any other memory standard. The PC800-40 rating means the module runs at an 800MHz bus with a 40ns access latency, which was the primary RDRAM speed tier for consumer and workstation Pentium 4 platforms from roughly 2000–2003. Note that Intel 820 and 850 boards require RIMM modules to be installed in pairs, and unused slots must be populated with CRIMM (Continuity RIMM) passthrough modules to maintain the Rambus channel. This module is suited for upgrading or repairing Pentium 4 workstations and servers that used Intel 850/850E-based motherboards, as well as certain early Xeon platforms using the Intel 860 chipset.