ASRock 990FX Extreme4 manual CAS# Latency tCL, RAS# to CAS# Delay tRCD, Row Precharge Time tRP

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CAS# Latency (tCL)

Use this item to change CAS# Latency (tCL) Auto/Manual setting. The default is [Auto].

RAS# to CAS# Delay (tRCD)

Use this item to change RAS# to CAS# Delay (tRCD) Auto/Manual setting. The default is [Auto].

Row Precharge Time (tRP)

Use this item to change Row Precharge Time (tRP) Auto/Manual setting. The default is [Auto].

RAS# Active Time (tRAS)

Use this item to change RAS# Active Time (tRAS) Auto/Manual setting. The default is [Auto].

Command Rate (CR)

Use this item to change Command Rate (CR) Auto/Manual setting. Min: 1T. Max: 2T. The default is [Auto].

RAS# Cycle Time (tRC)

Use this item to change RAS# Cycle Time (tRC) Auto/Manual setting. The default is [Auto].

Write Recovery Time (tWR)

Use this item to change Write Recovery Time (tWR) Auto/Manual setting. The default is [Auto].

Refresh Cyle Time (tRFC)

Use this item to change Refresh Cyle Time (tRFC) Auto/Manual setting. The default is [Auto].

RAS to RAS Delay (tRRD)

Use this item to change RAS to RAS Delay (tRRD) Auto/Manual setting. The default is [Auto].

Write to Read Delay (tWTR)

Use this item to change Write to Read Delay (tWTR) Auto/Manual setting. The default is [Auto].

Read to Precharge (tRTP)

Use this item to change Read to Precharge (tRTP) Auto/Manual setting. The default is [Auto].

Four Activate Window (tFAW)

Use this item to change Four Activate Window (tFAW) Auto/Manual setting. The default is [Auto].

Voltage Control

DRAM Voltage

Use this to select DRAM Voltage. The default value is [Auto].

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Contents 990FX Extreme4 Disclaimer Copyright NoticeContents Uefi Menu Bar Install Operating SystemCPU Configuration Super IO Configuration Acpi Configuration USB ConfigurationIntroduction Package ContentsSpecifications USB ConnectorSmart Switch Unique Feature Bios FeatureSupport CD HardwarePage Page Page Designed in Taipei Motherboard LayoutTable for Audio Output Connection I/O PanelLAN Port LED Indications Page Pre-installation Precautions InstallationInstallation of CPU Fan and Heatsink CPU InstallationDual Channel Memory Configurations Installation of Memory Modules DimmInstalling a Dimm Pcie Slots Installing an expansion cardExpansion Slots PCI and PCI Express Slots Requirements Slitm and Quad Slitm Operation GuideDouble-click Nvidia Settings icon on your Windows taskbar Driver Installation and SetupFor Windows XP / XP 64-bit OS For Slitm mode only Select Control Panel tab Select Nvidia Control Panel tabPage CrossFire Bridge Installing Three CrossFireXTM-Ready Graphics Cards CrossFireTM Bridge For Windows 7 / VistaTM OS Install the required drivers to your systemFor Windows XP OS \ Surround Display Information Surround Display FeatureClear Cmos Jumper Jumpers SetupJumper Setting Onboard Headers and Connectors USB 3.0 Header Besides two default USB Serial ATA3 ConnectorsOptional wireless transmitting USB 2.0 HeadersCD-ROM, DVD-ROM, TV Internal Audio Connectors This connector allows youTuner card, or Mpeg card Front Panel Audio HeaderPower LED to this header to Power LED Header Please connect the chassisIndicate system power status Power offATX Power Connector CPU Fan ConnectorsATX 12V Power Connector Please connect an ATX Power supply to this connectorFront USB 3.0 Panel Installation Guide USB 3.0 Panel Rear USB 3.0 Bracket Installation GuideSmart Switches Status Code Description 11 Dr. DebugPage Page Page What is Hot Plug Function? Serial ATA3 SATA3 Hard Disks InstallationWhat is Hot Swap Function? Hot Plug and Hot Swap Functions for SATA3 HDDsPoints of attention, before you process the Hot Plug SATA3 HDD Hot Plug Feature and Operation GuideHow to Hot Plug a SATA3 HDD Installing Windows XP / XP 64-bit With RAID Functions Driver Installation GuideSet up Uefi Make a SATA3 Driver DisketteMake a SATA3 driver diskette by following .16.1 on Use RAID Installation Guide to set RAID configuration\ RAID Installation Guide Make a SATA3 Driver Diskette Installing Windows XP / XP 64-bit Without RAID Functions Untied Overclocking Technology Uefi Menu Bar IntroductionMain Screen Navigation KeysTo jump to the Exit Screen or exit the current screen System Time HourMinuteSecondOC Tweaker Screen Multiplier/Voltage Change Dram Timing Control Power Down EnableHT Bus Speed HT Bus WidthCommand Rate CR RAS# to CAS# Delay tRCDWrite Recovery Time tWR RAS to RAS Delay tRRDNB Voltage Would you like to save current setting user defaults?HT Voltage CPU Load-line calibrationInstant Flash Advanced ScreenCool ‘n’ Quiet CPU ConfigurationSecure Virtual Machine Enhance Halt State C1EPrimary Graphics Adapter North Bridge ConfigurationSouth Bridge Configuration Storage Configuration Hard Disk S.M.A.R.T Onboard IDE & 1394 ControllerSuper IO Configuration Acpi Configuration Acpi Hpet table USB Mouse Power OnUSB 2.0 Controller USB ConfigurationUSB 3.0 Controller Legacy USB SupportChassis Fan 1 Setting CPU Fan 1 & 2 SettingChassis Fan 2 Setting Chassis Fan 3 SettingBoot Screen Security Screen Exit Screen Support CD Information Install Operating SystemRunning The Support CD Drivers MenuInstalling OS on a HDD Larger Than 2TB
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