Intel PT800DBZ, PT800DBP, VIA 8237, VIA PT800 user manual Dram Timing Settings

System BIOS Cacheable

Selecting Enabled allows caching of the system BIOS ROM at F0000h-FFFFFh, resulting in better system performance. However, if any program writes to this memory area, a system error may result. The settings are: Enabled and Disabled.

Video RAM Cacheable

Select Enabled allows caching of the video BIOS, resulting in better system performance. However, if any program writes to this memory area, a system error may result. The settings are: Enabled and Disabled.

Memory Hole

You can reserve this area of system memory for ISA adapter ROM. When this area is reserved, it cannot be cached. The user information of peripherals that need to use this area of system memory usually discusses their memory requirements. The settings are: Enabled and Disabled.

3-6-1		DRAM Timing Settings
		CMOS Setup Utility – Copyright(C) 1984-2003 Award Software
				DRAM Timing Settings
	System Performance						Item Help
					By SPD
	RAS Active Time				7T
	RAS Precharge Time			3T
	RAS to CAS Delay			3T			Menu Level >>
	DRAM CAS Latency			2.5
	Bank Interleave			Enabled
	DRAM Command Rate			2T Command
	DRAM Burst Length			8
	Write Recovery Time			2T
	Write to Read Command Delay			3T
		↑↓→← Move Enter:Select +/-/PU/PD:Value F10:Save					ESC:Exit F1:General Help
		F5:Previous Values	F6:Optimized Defaults			F7:Standard Defaults

RAS Active Time

This field let’s you insert a timing delay between the CAS and RAS strobe signals, used when DRAM is written to, read from, or refreshed. Fast gives faster performance; and Slow gives more stable performance. This field applies only when synchronous DRAM is installed in the system. The settings are: 2T and 3T.

RAS Precharge Time

If an insufficient number of cycles is allowed for the RAS to accumulate its charge before DRAM refresh, the refresh may be incomplete and the DRAM may fail to retain date. Fast gives faster performance; and Slow gives more stable performance. This field applies only when synchronous DRAM is installed in the system. The settings are: 2T and 3T.

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