Bit 64-bit – Asus P5B User Manual
Page 42
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Chapter 2: Hardware information
• If you install four 1 GB memory modules, the system may detect less than
3 GB of total memory because of address space allocation for other critical
functions. This limitation applies to Windows XP 32-bit version operating
system since it does not support PAE (Physical Address Extention) mode.
• If you install Windows XP 32-bit version operating system, we recommend
that you install less than 3GB of total memory.
Notes on memory limitations
• Due to chipset limitation, this motherboard can only support up to
8 GB on the operating systems listed below. You may install a maximum of
2 GB DIMMs on each slot, but only DDR2-533 and DDR2-667 2 GB density
modules are available for this configuration.
• Some old-version DDR2-800/667 DIMMs may not match Intel
®
’s
On-Die-Termination (ODT) requirement and will automatically downgrade to
run at DDR2-533. If this happens, contact your memory vendor to check the
ODT value.
• Due to chipset limitation, DDR2-800 with CL=4 will be downgraded to run
at DDR2-667 by default setting. If you want to operate with lower latency,
adjust the memory timing manually.
• Due to chipset limitation, DDR2-667 with CL=3 will be downgraded to run
at DDR2-533 by default setting. If you want to operate with lower latency,
adjust the memory timing manually.
P5B Premium Series Motherboard Qualified Vendors Lists (QVL)
DDR2-800MHz capability
Size
Vendor
Chip No.
SS/
DS Part No.
DIMM support
A*
B*
C*
512MB
KINGSTON K4T51083QC
SS KVR800D2N5/512
v
v
v
1024MB
KINGSTON K4T51083QC
DS KVR800D2N5/1G
v
v
v
1024MB
KINGSTON Heat-Sink Package
DS KHX6400D2LL/1G
v
v
v
1024MB
KINGSTON Heat-Sink Package
SS KHX6400D2LLK2/1GN
v
v
v
2048MB
KINGSTON Heat-Sink Package
DS KHX6400D2K2/2G
v
v
v
512MB
Qimonda
HYB18T256800AF25F
DS HYS64T64020HU-25F-A
v
v
v
256MB
Qimonda
HYB18T512160BF25F
SS HYS64T32000HU-25F-B
v
v
v
512MB
Qimonda
HYB18T512800BF25F
SS HYS64T64000HU-25F-B
v
v
v
1024MB
Qimonda
HYB18T512800BF25F
DS HYS64T128020HU-25F-B
v
v
v
512MB
SAMSUNG EDD339XX
SS M378T6553CZ3-CE7
v
v
v
256MB
SAMSUNG K4T51163QC-ZCE7
SS M378T3354CZ3-CE7
v
v
v
512MB
SAMSUNG ZCE7K4T51083QC
SS M378T6553CZ3-CE7
v
v
v
1024MB
SAMSUNG ZCE7K4T51083QC
DS M378T2953CZ3-CE7
v
v
v
512MB
Hynix
HY5PS12821BFP-S5
SS HYMP564U64BP8-S5
v
v
v
32-bit
64-bit
Windows 2000 Advanced Server
Windows XP Professional x64 Edition
Windows Vista x64 Edition