Asus P5S-MX SE - Manual (Page 29)

ASUS P5S-MX SE 1-17
Notes on memory limitations
• Due to chipset limitation, this motherboard can only support up to
4 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.
32-bit 64-bit
Windows ® XP Windows ® XP x64 Edition
Windows ® 2003 server Windows ® 2003 server x64 Edition
• Some old-version DDR2-667 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, DDR2-667 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 4MB reduction in total
memory when enabling ASUS Thermostat function under Single Channel
mode, and 8MB reduction under Dual Channel Mode.