184 pin Rambus RDRAM memory
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184-pin Rambus 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"
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
It will show the difference between PC800, PC1066 and RIMM4200.
There are 3 independent attributes that define which specification a RAMBUS
module belongs to:
||45ns, 40ns, 32ns.
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.
Here's a side by side comparison of 16-bit and 32-bit RAMBUS modules:
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.
For Installation Help please see "How
to Install Guides"