SDRAM RAS Precharge Time

Common Options : 2, 3, 4

Quick Review

This BIOS feature sets the number of cycles required for the RAS to accumulate its charge before another row can be activated. If the RAS Precharge Time is too long, it will reduce performance by delaying all row activations. Reducing the precharge time to 2 improves performance by allowing a new row to be activated earlier.

However, the short precharge time of 2 may be insufficient for some memory modules. In such cases, the active row may lose its contents before they can be returned to the memory bank and the row deactivated. This may cause data loss or corruption when the memory controller attempts to read from the active row or write to it.

Therefore, it is recommended that you reduce the SDRAM RAS Precharge Time to 2 for better performance but increase it to 3 or 4 if you experience system stability issues after reducing the precharge time.

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