The P4 Mainboard Series
Page 31
DRAM Timing
This field enables/disables you from selecting the values for following six
fields manually. These (six) fields determine the DRAM read/write timing. If
you select
By SPD
then those fields will be automatically configured by the
system BIOS. (The performance parameters of the installed memory chips
(DRAM) determines the value in those fields.) If you select Manual you will
need to enter the values for those fields. You should not change the values
of those fields from the factory setting unless you have installed new mem-
ory that has a different performance rating than the original DRAMs.
SDRAM CAS Latency
Before SDRAM can execute a read command that it receives, there is a de-
lay time, which is measured in clock cycles (CLK). Some memory modules
are unable to deal with short delay times. We recommend that you set this
delay time between 2 and 2.5 CLK’s (the default is 2.5). If your system be-
comes unstable we recommend that you increase the delay time.
AGP & P2P Bridge Control
When you press enter the following menu will appear:
The option
“AGP Mode”
'''#%'@.980
AGP Aperture Size
This field selects the size of the Accelerated Graphics Port (AGP) aperture.
The aperture is a portion of the PCI memory address range dedicated for
graphics memory address space. Host cycles that hit the aperture range
are forwarded to the AGP without any translation. The default is 64MB. You
may increase this memory when you need to have faster access for 3D
graphics applications (e.g. games).
AGP Driving Control
The recommended setting for this field is the default “Auto”. If you have an
unstable AGP card you may use this field to choose the appropriate set-
tings. If you do need to tune the timing, please consult your AGP Card
manual or Vendor.
AGP Driving Value
This item allows you to adjust the AGP driving force.
AGP Master 1 WS Write
When Enabled, writes to the AGP are executed with one-wait states.
AGP Master 1 WS Read
When Enabled, reads to the AGP are executed with one-wait states.
()(,'?
()
() &
@
() ='
()+6
()66
()6:
$,
'
23(4$8&8',"!
()@4 &
E5F
E 1F
E('F
(
EF
EF
EF
Managing The PC BIOS
