American Megatrends MAN-772 manual Type of System Supported System Memory Socket

Overview, Continued

CPU Thermal Monitor The Apollo IV motherboard includes a special heat sensor under the CPU that monitors the CPU temperature. This heat sensor generates an SMI (System Management Interrupt) when the CPU temperature is too hot. The SMI can be set to turn on the external cooling fan and/or lower the CPU clock frequency. You are waned that the CPU is overheating. The CPU is returned to normal operating conditions when the CPU temperature returns to normal. This feature can only be implemented if a power supply with a soft-off power controller is installed in the computer. See the American Megatrends DMI Wizard 95 User’s Guide for additional information about this feature.

SDRAM The Apollo IV motherboard provides two 168-pin DIMM system memory sockets that support SDRAM (Synchronous Dynamic Random Access Memory). SDRAM increases the CPU-to-memory data transfer rate to 528 MBs. This rate is normally 264 MBs if EDO DRAM is installed. The integrated I2C controller optimizes the memory timing parameters.

System Memory The motherboard supports up to 256 MB of system memory mounted on the motherboard as follows:

Type of System	Type of System	Supported System
Memory Socket	Memory	Memory
four 72-pin SIMM	Fast Page Mode or	8 MB, 16 MB, 32 MB,
sockets	EDO DRAM	64 MB, or 128 MB
two 168-pin DIMM	EDO DRAM or	8 MB, 16 MB, 32 MB,
sockets	SDRAM	64 MB, or 128 MB

Cont’d

Chapter 1 Hardware Installation 3