Asus P7H55 Owner's Manual download pdf (Page 51)

Chapter 2: BIOS information 2-13

The following two items appear only when you set the Ai Overclock Tuner item to

[Manual], [D.O.C.P.] or [X.M.P.].

BCLK Frequency [XXX]

Allows you to adjust the Internal Base Clock (BCLK). Use the <+> and <-> keys to adjust the

value. You can also type the desired value using the numeric keypad. The values range from

80 to 500.

PCIE Frequency [100]

Allows you to set the PCI Express frequency. Use the <+> and <-> keys to adjust the PCIE

frequency. The values range from 100 to 200.

DRAM Frequency [Auto]

Allows you to set the DDR3 operating frequency.

Conguration options: [Auto] [DDR3-800MHz] [DDR3-1066MHz] [DDR3-1333MHz]

The DRAM Frequency conguration options vary with the BCLK Frequency item settings.

Selecting a very high DRAM frequency may cause the system to become unstable! If this

happens, revert to the default setting.

QPI Frequency [Auto]

Allows you to set the QPI operating frequency.

Conguration options: [Auto] [4270MHz] [4800MHz]

2.4.6 DRAM Timing Control [Auto]

The items in this menu allow you to set the DRAM timing control features.

The conguration options for some of the following items vary depending on the DIMMs

you install on the motherboard.

1st Information: 9-9-9-24-4-74-10-7-20

The values vary depending on your settings of the following sub-items:

DRAM CAS# Latency [Auto]

Conguration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [10 DRAM Clock] [11

DRAM Clock]

DRAM RAS# to CAS# Delay [Auto]

Conguration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [9 DRAM Clock] [15

DRAM Clock]

DRAM RAS# PRE Time [Auto]

Conguration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [9 DRAM Clock] [15

DRAM Clock]

DRAM RAS# ACT Time [Auto]

Conguration options: [Auto] [3 DRAM Clock] [4 DRAM Clock] – [30 DRAM Clock] [31

DRAM Clock]

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Asus P7H55 Owner's Manual Page 51