Memory - SOYO SY-P4VSA User Manual

Motherboard Description

1-8 MEMORY

Main Memory
The motherboard has three DIMM sockets. RAM can be installed in one,
two, or three sockets. Using the serial presence detect (SPD) data structure,
programmed into an E²PROM on the DIMM, the BIOS can determine the
SDR RAM's size and speed. Minimum DIMM memory size is 64 MB;
maximum DIMM memory size is 256/512 MB. Memory size and speed can
vary between sockets.
The motherboard supports the following memory features:
– DRAM interface pseudo-synchronous with host CPU (100/133 MHz) for
most flexible configuration
– DRAM interface may be faster than CPU by 33 MHz to allow use of 133
MHz memory with 100 MHz FSB clock
– Concurrent CPU, AGP, and V-Link access
– Supports SDR SDRAM memory types
– Dynamic Clock Enable (CKE) control for SDRAM power reduction in
high speed systems
– Mixed 1M / 2M / 4M / 8M / 16M / 32M / 64MxN DRAMs
– Supports 6 banks up to 3 GB DRAMs (512Mb x8/x16 DRAM technology)
for registered SDR modules
– Supports 8 banks up to 2 GB DRAMs (512Mb x8/x16 DRAM technology)
for unbuffered SDR modules
– Flexible row and column addresses. 64-bit data width only
– LVTTL 3.3V DRAM interface with 5V-tolerant inputs for SDR SDRAM
– Programmable I/O drive capability for MA, MD, and command signals
– Dual copies of MA and control signals for improved drive
– Two-bank interleaving for 16Mbit SDRAM support
– Two-bank and four bank interleaving for 64Mbit SDRAM support
– Supports maximum 8-bank interleave (i.e., 8 pages open simultaneously);
banks are allocated based on LRU
– Seamless DRAM command scheduling for maximum DRAM bus
utilization
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SY-P4VSA