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184 pin Rambus RDRAM memory


184 pin Rambus RDRAM memory top sellers

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184 pin Rambus (RDRAM)        
PC600 300Mhz 64MB 128MB 256MB 512MB
PC600 ECC 300Mhz 64MB 128MB 256MB 512MB
PC700 350Mhz 64MB 128MB 256MB 512MB
PC700 ECC 350Mhz 64MB 128MB 256MB 512MB
PC800 400Mhz 64MB 128MB 256MB 512MB
PC800 45ns 400Mhz   128MB 256MB  
PC800 ECC 400Mhz 64MB 128MB 256MB 512MB
PC800 40ns 533Mhz   128MB 256MB 512MB
PC800 ECC 40ns 533Mhz   128MB 256MB 512MB
PC800 400Mhz Kit     256MB 512MB
PC800 ECC 400Mhz Kit       512MB
PC1066 533Mhz 128MB 256MB 512MB
PC1066 ECC 533Mhz   256MB 512MB

184-pin Rambus RDRAM RIMM

Rambus 184 pin RDRAM RIMM
approx. 5.25” x 1.25”

The Rambus RIMM™ module is a general purpose high-performance memory module suitable for use in a broad range of applications including computer memory, personal computers, workstations, and other applications where high bandwidth and low latency are required. 

High speed 1066, 800, 711 and 600 MHz RDRAM storage
184 edge connector pads with 1mm pad spacing
Maximum module PCB size: 133.5mm x 31.75mm x 1.37mm (5.25" x 1.25" x 0.05")
Each RDRAM has 16 banks, for a total of 256, 192, 128, 96, or 64 banks on each 128MB, 96MB, 64MB, 48MB, or 32MB module respectively
Gold plated edge connector pad contacts
Serial Presence Detect (SPD) support
Operates from a 2.5 volt supply (5%)
Low power and power down self refresh modes
Separate Row and Column buses for higher efficiency

RDRAM delivers pure performance where it matters most: leading-edge applications. Whether on multimedia, network packet switching, content creation, etc., RDRAM unleashes the processing power of your system. High-bandwidth RDRAM is essential to drive top performing processors. RDRAM provides a flexible solution to meet bandwidth requirements of tomorrow's high performance systems. RDRAMs system solution scales easily from 800Mhz to 1066Mhz to 1200Mhz. Additionally, commodity RDRAM components are configurable in a range of RIMM module configurations from 16 to 32 and 64 bit data busses. These RIMM module solutions offer up to 9.6 GByte/second of memory performance while retaining standard PC form factors.

Rambus Modules, 16 bit, 32 bit, PC800, PC1066 ?

This summary will show the different Rambus modules and their relative form factors.
It will show the difference between PC800, PC1066 and RIMM4200.

There are 3 independent attributes that define which specification a RAMBUS module belongs to:

Clock speed: 800MHz, 1066MHz.
Latency: 45ns, 40ns, 32ns.
Bus width: 16-bit, 32-bit.

Clock speed:
This is the effective clock speed. The actual clock speed is 400MHz for PC800 and 533MHz for PC1066, the clock is doubled using DDR technology.

The first versions of PC800 RAMBUS used 45ns components. These parts are typically compatible with the Intel i820, i840 and i850 chipsets.
The Intel i850E chipset requires PC800 RAMBUS with 40ns components.

Bus width:
Here's a side by side comparison of 16-bit and 32-bit RAMBUS modules:

Rambus 16 bit 184 pin

As you can see the modules are physically different, a 16-bit module will not fit in a 32-bit slot, a 32-bit module will not fit in a 16-bit slot.
The 32-bit modules appear to be two 16-bit modules from the mainboard's point of view, so you do not need to install them in pairs. You do still need to install Continuity RIMMS in any empty RIMM sockets.
Currently the 32-bit modules are only available as RIMM4200, 1066MHz 32ns, which has led to the confusion that all 1066MHz modules are 32-bit.

RAMBUS Name RIMM1600 RIMM2100 RIMM3200 RIMM4200
Intel's Name PC800 PC1066 PC800 PC1066
Clock Speed 800MHz 1066MHz 800MHz 1066MHz
Latency 40/45ns 32ns 40/45ns 32ns
Bus Width 16-bit 16-bit 32-bit 32-bit

For Installation Help please see "How to Install Guides"

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