Asus EVOLUTION P5E64 WS - Manual (Page 88)

4-18 Chapter 4: BIOS setup
The configuration options for the following sub-item vary depending on the
DIMMs you install on the motherboard.
eXtreme Memory Profile [Disabled]
This item appears only when you set the Ai Overclock Tuner item to
[X.M.P.]. Allows you to select the X.M.P. mode supported by your Memory
module.
Configuration options: [Disabled] [Profile #1] [Profile #2]
4.4.2 CPU Ratio Setting [Auto]
This item allows you to set the ratio between CPU Core Clock and FSB Frequency.
The value is adjusted by typing the desired values using the numeric keypad and
press the key. You can also use the <+> and <-> keys to adjust the value.
To restore the default setting, type [auto] using the keyboard and press the
key. If an invalid ratio is set in CMOS, then actual and setpoint values may differ.
4.4.3 FSB Strap to North Bridge [Auto]
When set to [Auto], the FSB Strap will be adjusted automatically by FSB
Frequency and DRAM Frequency.
Congifuration options: [Auto] [200MHz] [266MHz] [333MHz] [400MHz]
X.M.P. DIMM Installation Recommendation
X.M.P. DIMM Frequency 1800 MHz 1800 MHz 1600 MHz 1600 MHz
Sockets
DIMM_A1 - √ - √
DIMM_B1 - √ - √
DIMM_A2 √ - √ -
DIMM_B2 √ - √ -
The following two items (FSB Frequency and PCIE Freuency) on the next
page appear only when you set the Ai Overclock Tuner item to [Manual].
To obtain the best performance of the X.M.P. 1800/1600 DIMM, install only
one DIMM on each memory channel. Refer to the table below for X.M.P. DIMM
installation recommendation.