User Guide
ASUS P5B-VM 1-19
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 conguration.
32-bit 64-bit
Windows
®
2000 Advanced Windows
®
XP Professional x64
Server Edition
• 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. There will be 8MB reduction in total
memory when enabling ASUS Thermostat function under Single Channel
mode, and 16MB reduction under Dual Channel Mode.
• The total memory may has 8MB reduction under Single Channel mode, and
16MB reduction under Dual Channel mode because the address space is
reserved for Intel® Quiet System Technology.