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Motherboard Description
1-8 MEMORY
Main Memory
The motherboard has three DDR DIMM sockets. DDR RAM can be
installed in one, two, or three sockets. Using the serial presence detect (SPD)
data structure, programmed into an E²PROM on the DDR DIMM, the BIOS
can determine the DDR RAM's size and speed. Minimum DDR DIMM
memory size is 64 MB; maximum DDR 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 (100/133 MHz) or AGP
(66MHz) 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
−
Concurrent CPU, AGP, and V-Link access
−
Supports DDR RAM memory types only
−
Flexible row and column addresses. 64-bit data width only
−
2.5V SSTL-2 DRAM interface for DDR RAM
−
Optional bank-by-bank ECC (single-bit error correction and multi-bit
error detection) or EC (error checking only) for DRAM integrity
−
Supports maximum 6-bank interleave (i.e., 8 pages open simultaneously);
banks are allocated based on LRU
−
Independent DDR RAM control for each bank
−
Four cache lines (16 quadwords) of CPU to DRAM write buffers
−
Four cache lines of CPU to DRAM read prefetch buffers
−
Read around write capability for non-stalled CPU read
−
Speculative DRAM read before snoop result
−
Burst read and write operation
−
x-1/2-1/2-1/2-1-1/2-1/2-1/2 back-to-back accesses for DDR SDRAM
−
Supports DDR SDRAM CL 2/2.5 and 1T/2Tper command
−
Decoupled and burst DRAM refresh with staggered RAS timing. CAS
before RAS or self refresh
SY-K7V DRAGON Plus!
10
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