Abit AN7, User Manual

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3-10 Chapter 3
3-4. Advanced Chipset Features
Enhance PCI Performance:
Two options are available: Disabled Enabled. The default setting is Disabled . This item can improve
the PCI transmission performance.
CPU Disconnect Function:
When set to [Enabled], the system will disconnect the S2K FSB on a C1 state change.
Memory Timings:
Five options are available: Optimal Aggressive Turbo By SPD Expert. The default setting is
Optimal . Choose Optimal for better memory compatibility; choose Aggressive / Turbo for better memory
performance; choose Expert for user-define. When set to By SPD , the BIOS will read the DRAM module
SPD data and automatically set to the values stored in it.
Row-active delay:
Fifteen options are available: from 1 to 15. This option specifies the row active time. This is the minimum
number of cycles between an activate command and a precharge command to the same bank.
RAS-to-CAS delay:
Seven options are available: from 1 to 7. This item is to set SDR/DDR SDRAM RAS to CAS delay. It
can define the SDRAM ACT to Read/Write command period.
Row-precharge delay:
Seven options are available: from 1 to 7. This item controls the idle clocks after issuing a precharge
command to the DRAM.
CAS Latency:
Three options are available: 2.0 2.5 3.0. The default setting is 2.5 . You can select SDRAM CAS
( C olumn A ddress S trobe) latency time according your SDRAM specification.
AN7