Chapter 2. System-Board Features
L2 Cache
The IntelliStation E Pro computer is equipped with a Pentium II microprocessor with MMX technology and
512 KB of L2 cache. The L2 cache ECC function is automatically enabled when ECC memory is installed.
If nonparity memory is installed, the L2 cache ECC is disabled. (For information on overriding these
settings, refer to Configuration/Setup Utility Program in the
IntelliStation E Pro User Guide.)
System Memory
The system memory interface is controlled by the 440BX chip set. Synchronous dynamic random access
memory (SDRAM) is standard.
The maximum amount of system memory is 768 MB. For memory expansion, the system board provides
three dual inline memory module (DIMM) connectors. DIMM sizes of 16MB, 32MB, 64MB, 128MB, and
256MB with a speed of 100 MHz are supported. The amount of memory preinstalled varies by model.
Memory DIMM Options
Important
Be sure to observe the following guidelines when adding memory DIMM options to your computer.
The IntelliStation E Pro does not support EDO memory.
Only 168-pin, 100 MHz, 3.3v industry standard memory DIMMs are supported.
There are two types of memory DIMMs available for the IntelliStation E Pro computer:
Registered
Memory technology and Unregistered Memory technology.
Registered Memory DIMMs are not compatible with Unregistered Memory DIMMs.
The 256 MB ECC Memory DIMM is
Registered Memory technology.
Only the 256 MB ECC Registered Memory DIMM (IBM OBI Part Number 01K1132) is supported on
the IntelliStation E Pro computer.
The 16 MB, 32 MB, 64 MB, and 128 MB DIMMs are
Unregistered Memory technology.
When adding additional memory DIMMs, be sure that all installed memory DIMMs are of the same
type. For example:
– All installed DIMMs are Registered Memory
- or -
– All installed DIMMs are Unregistered Memory
For information on the pin assignments for the memory module connectors, see “Memory Connectors” on
page 50.
The following figure shows some possible configurations for the supported DIMMs.
Note: Values in the following table are represented in megabytes (MB).
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Technical Information Manual
