Portwell PEB-7706G2A, User Manual

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PEB-7706G2A
User’s Manual 16
1.9.1 CPU FSB and memory speed
The
PEB-7706G2A
can accept DDR SDRAM memory chips without parity.
Also note: The
PEB-7706G2A
accepts PC2100 (DDR266), PC2700 (DDR
333) and PC3200 (DDR 400) DDR SDRAM, depending on the CPU
front side bus frequency (FSB). Please refer below table for the relation-
ship between the CPU FSB and memory speed.
Table 1.8: CPU FSB and memory speed
The
PEB-7706G2A
does not support ECC (error checking and correction).
Memory modules with 9 SDRAM chips/side support ECC; modules with
8 chips/side do not support ECC.
1.9.2 Dual channel configuration
The four DIMM sockets are arranged in two channels: DIMM1 &
DIMM2 in channel A; DIMM3 & DIMM4 in channel B. To enable dual
channel operation, please install a matched pair of DIMMs in DIMM1 &
DIMM3 (green sockets). If additional memory is to be used, another
matched pair of DIMMs have to be installed in DIMM2 & DIMM4 (pur-
ple sockets).
Note: System resources such as PCI and AGP
cards require physical memory address loca-
tions that reduce available memory
addresses above 3GB. This may result in
less than 4GB of memory being available to
the operating system and applications.
Memory
Speed Processor FSB frequency Memory speed Outcome
DDR400 Pentium 4 800 MHz 400 MHz
DDR333 Pentium 4 800 MHz 320 MHz
Pentium 4 533MHz 333 MHz
Pentium 4
or Celeron 400 MHz 266 MHz
DDR266 Pentium 4 533 or 400 MHz 266 MHz
Celeron 400 MHz 266 MHz