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Motherboard Description SY-7VCA
10
1-8 MEMORY
1-8.1 Main Memory
The motherboard has three DIMM sockets. SDRAM 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 SDRAM’ s size and speed. Minimum DIMM memory size is
8 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 synchronous with host CPU (66/100/133MHz) or
AGP (66MHz) for most flexible configuration
DRAM interface may be faster than CPU by 33 MHz to allow use
of PC100 memory modules with 66MHz Celeron or use of PC133
with 100MHz Pentium II or Pentium III
DRAM interface may be slower than CPU by 33 MHz to allow use
of older memory modules with newer CPUs (e.g., PC66 memory
modules with 100MHz Pentium II or Pentium III)
Concurrent CPU, AGP, and PCI access
Supports FP,EDO, SDRAM, ESDRAM and VCM SDRAM
memory types
Different DRAM types may be used in mixed combinations
Different DRAM timing for each bank
Dynamic Clock Enable (CKE) control for SDRAM power
reduction in high speed system.
Mixed 1M/2M/4M/8M/16M/32MxN DRAMs
The 7VCA supports 3 DIMMs or 6 banks at 133MHz for 1.5GB
max memory.
Flexible row and column addresses
64-bit data width only
3.3V DRAM interface with 5V-tolerant inputs
Programmable I/O drive capability for MA, command, and MD
signals