Abit SR7-8X, Руководство пользователя

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Introducing the BIOS
User’s Manual
4-15
Figure 4-5B. Advanced DRAM Control Setup Menu Screen Shot
DRAM CAS# Latency:
Three options are available: 2T 2.5T 3T. The default setting is 2.5T . You can select SDRAM CAS
( C olumn A ddress S trobe) latency time according your SDRAM specification.
Timing Setting Mode:
Six options are available: Safe Normal Fast Turbo Ultra Manual. The default setting is
Normal . If you choose the Manual , the following items will be available.
DDR RAS Precharge Time:
Three options are available: 2T 3T 4T. The default setting is 3T . This item is to set SDR/DDR
SDRAM RAS precharge time. It can define the SDRAM precharge to ACT command period.
tRP timing value (Precharge time – time from precharge command to when back can be activated).
DDR RAS to CAS Delay:
Three options are available: 2T 3T 4T. The default setting is 3T . This item is to set SDR/DDR
SDRAM RAS to CAS delay. It can define the SDRAM ACT to Read/Write command period.
tRCD timing value = RAS to CAS latency + rd/wr command delay