Asus P5KC Motherboard Installation Guide - Page 88
DRAM Frequency [Auto], DRAM Timing Control [Auto]
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DRAM Frequency [Auto] Allows you to set the DDR2/DDR3 operating frequency. The configuration options vary depending on the DIMMs you install on the motherboard. (For DDR3 DIMMs) Configuration options: [Auto] [DDR3-800MHz] [DDR3-833MHz] [DDR3-1000MHz] [DDR3-1066MHz] [DDR3-1111MHz] [DDR3-1333MHz] (For DDR2 DIMMs) Configuration options: [Auto] [DDR2-667MHz] [DDR2-800MHz] [DDR2-889MHz] [DDR2-1066MHz] Selecting a very high DRAM frequency may cause the system to become unstable! If this happens, revert to the default setting. DRAM Timing Control [Auto] Configuration options: [Auto] [Manual] • The following sub-items apprear only when you set the DRAM Timing Control item to [Manual]. • The configuration options for some of the following items vary depending on the DIMMs you install on the motherboard. CAS# Latency [6] Configuration options: [3]~[6] RAS# to CAS# Delay [5 DRAM Clocks] Configuration options: [3 DRAM Clocks]~[10 DRAM Clocks] RAS# Precharge [5 DRAM Clocks] Configuration options: [3 DRAM Clocks]~[10 DRAM Clocks] RAS# Activate to Precharge [15 DRAM Clocks] Configuration options: [3 DRAM Clocks]~[34 DRAM Clocks] TWR [Auto] Configuration options: [Auto] [1 DRAM Clocks]~[15 DRAM Clocks] TRFC [Auto] Configuration options: [Auto] [20 DRAM Clocks] [25 DRAM Clocks] [30 DRAM Clocks] [35 DRAM Clocks] [42 DRAM Clocks] TWTR [Auto] Configuration options: [Auto] [1 DRAM Clocks]~[15 DRAM Clocks] TRRD [Auto] Configuration options: [Auto] [1 DRAM Clocks]~[15 DRAM Clocks] TRTP [Auto] Configuration options: [Auto] [1 DRAM Clocks]~[15 DRAM Clocks] 4-18 Chapter 4: BIOS setup