Hardware Installation
2.2.1 Determining the Memory Size of a RIMMTM Module
The memory size of a RIMMTM module will depend on the memory size of a device and the number of devices used; and the memory size of a device will depend on the RDRAM technology used.
RDRAM Technology | Memory Size of a Device |
64Mbit/72Mbit | 8MB |
128Mbit/144Mbit | 16MB |
256Mbit/288Mbit | 32MB |
For example, if a module that uses the 64Mbit/72Mbit technology has 8 devices - then the memory size of a device multiplied by the number of devices will be the total memory size of the module.
8MB | x | 8 | = | 64MB |
(memory size of |
| (8 devices on the |
| (memory size of |
1 device in a |
| module) |
| the module) |
64Mbit/72Mbit |
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technology) |
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2.2.2 Determining the Maximum System Memory Size
The maximum memory size supported by the system will depend on the memory size of a device (relevant to its RDRAM technology) multiplied by 32. Why 32? This is because a system has only 1 Rambus Channel and a Rambus Channel supports up to 32 devices only.
RDRAM Technology | Mem. Size of a Device x 32 Devices = Max. Memory |
64Mbit/72Mbit | 8MB x 32 = 256MB |
128Mbit/144Mbit | 16MB x 32 = 512MB |
256Mbit/288Mbit | 32MB x 32 = 1GB |
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2.2.3 Important Installation Instructions
Important:
Certain rules must be followed when installing RIMMTM modules to obtain optimum system performance.
Rule 1. The RIMMTM module with the most devices must be installed into the RIMM1 socket.
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