Asus P5B - Manual (Page 38)

2- Chapter 2: Hardware information
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 DDR2-5 and DDR2-667 2 GB density
modules are available for this configuration.
2-bit 6-bit
Windows ® 2000 Advanced Windows ® XP Professional x6
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 DDR2-5. If this happens, contact your memory vendor to check the
ODT value.
• Due to chipset limitation, DDR2-800 with CL= 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= will be downgraded to run
at DDR2-5 by default setting. If you want to operate with lower latency,
adjust the memory timing manually.