Jetway Computer J7F2 - Manual (Page 32)

28
3-6-1 DRAM Timing Setting
Phoenix – AwardBIOS CMOS Setup Utility
DRAM Timing Setting
Item Help
System performance By SPD
RAS Active Time 13T
RAS Precharge Time 3T
RAS to CAS Delay 3T
DRAM CAS Latency 4.0T
Bank Interleave Disabled
Write Recovery Time 5T
DRAM Command Rate 2T
Menu Level >>
↑↓→← Move Enter:Select Item +/-/PU/PD:Value F10:Save ESC:Exit F1:General Help
F5:Previous Values F6:Optimized Defaults F7:Standard Defaults
DRAM CAS Latency
When synchronous DRAM is installed, the number of clock cycles of CAS latency depends
on the DRAM timing. The settings are: 2T, 2.5T 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.
RAS-to-CAS Delay
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.