Intel Pentium 4 Processor in the 478-pin Package / Intel 850 Chipset Platform Family Design Guide

Memory Interface Routing
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Intel
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Pentium
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4 Processor / Intel
®
850 Chipset Family Platform Design Guide 109
6.1.9 533 MHz (PC1066) Rambus RIMM Module Thermal
Consideration
533 MHz (PC1066) RIMM modules will generate more heat than 400 MHz (PC800) RIMM
modules. System designers should insure proper airflow to prevent overheating of memory or
other components in the system environment when using PC1066 RIMM modules.