Dell PowerEdge 2600 - Manual (Page 8)

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Compatibility Considerations
Processors
A system board that uses up to two Intel Xeon™ 533-MHz front-side bus microprocessors is now
available. The 533-MHz front-side bus processors have 604 pins, support internal operating speeds
of at least 2.0 GHz, and include an internal cache of at least 512 KB. The Xeon 400-MHz front-side
bus processors have 603 pins.
The Xeon 400-MHz and 533-MHz front-side bus processors cannot be used together in the same
system. If both processor speeds are installed, the system will not boot and no error message is
displayed. Power is not applied to the processors so that they will not be damaged.
Memory
PC 1600 (DDR200) memory modules are not compatible with the Xeon 533-MHz front-side bus
processor. If installed, these memory modules prevent a system with this processor from performing
a POST and result in a memory-configuration error beep code of 1-3-2.
System BIOS Version
If your system uses the Xeon 533-MHz front-side bus processor, your system BIOS must be
version A04 or higher. BIOS versions below A04 are not compatible with this processor.