ASROCK P55 Extreme User Manual page 57

CPU Ratio Setting
If the ratio status is unlocked, you will find this item appear to allow you
changing the ratio value of this motherboard.
QPI Frequency
Use this option to adjust QPI (QuickPath Interconnect) frequency. Configu-
ration options: [Auto], [4.800GT] and [4.266GT]. The default value is [Auto].
DRAM Frequency
If [Auto] is selected, the motherboard will detect the memory module(s)
inserted and assigns appropriate frequency automatically. You may select
[Auto], [400MHz (DDR3 800)], [533MHz (DDR3 1066)], [667MHz (DDR3
1333)], [800MHz (DDR3 1600)], [933MHz (DDR3 1866)] or [1066MHz (DDR3
2133)].
XMP Technology
Use this option to adjust XMP memory. Configuration options: [Profile 1] and
[Profile 2]. The default value is [Auto].
DRAM Timing Control
Use this item to control DRAM Timing.
BIOS SETUP UTILITY
Advanced
DRAM Timing Control
DRAM tCL
DRAM tRCD
DRAM tRP
20 [Auto]
DRAM tRAS
48 [Auto]
DRAM tRFC
DRAM tWR
DRAM tWTR
DRAM tRRD
DRAM tRTP
21 [Auto]
DRAM tFAW
DRAM Command Rate
DRAM Enhanced Training
v02.54 (C) Copyright 1985-2005, American Megatrends, Inc.
DRAM tCL
Use this item to adjust the means of memory accessing. Configuration
options : [Auto], [6] to [11].
DRAM tRCD
This controls the number of DRAM clocks for TRCD. Configuration options:
Configuration options: [Auto], [3] to [15].
DRAM tRP
This controls the number of DRAM clocks for TRP. Configuration options:
Configuration options: [Auto], [3] to [15].
DRAM tRAS
This controls the number of DRAM clocks for TRAS. Configuration options:
DRAM tCL
8 [Auto]
8 [Auto]
8 [Auto]
Min = 6
8 [Auto]
Max = 11
4 [Auto]
6 [Auto]
5 [Auto]
Select Screen Select Screen
Select Item Select Item
+- +- Change Option Change Option
[Auto]
F1 F1 General Help General Help
[Auto] F9 F9 Load Defaults Load Defaults
F10 F10 Save and Exit Save and Exit
ESC ESC Exit Exit
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