Graphics Card\BIOS settings
Posted on 2006-11-30
here is my question:
I have purchased a Graphics Card - 256MB Sapphire Radeon 925 AGP
My machine is running with an Intel Pentium 4 1.7Gh chip and two memory modules !Gb and 256Mb showing 127953 memory on Norton monitor
When fitting it to the AGP slot on my motherboard the only thing it suggested was ensuring that previous card or onboard graphics were disabled and setting put for this one.
In the Bios for my motherboard which is an ASUS P4S333-VM I found various setting as below which do I change or use for optimum performance.
In the advanced menu there are two further sub-menus:
in PCI configuration I found Primary VGA BIOS (PCI VGA Card) which allows me to select the primary graphics card - PCI VGA, AGP VGA, or On-board
so I obviously chose AGP VGA Card
in Chip Configuration I have found four settings which I'm not entirely sure about, posted at the foot of this quesiton is my manual.
AGP Capability I think should be set to 4X to get max benefit from card
AGP Fast Write I'm not sure about
Onboard VGA should now be set at minimum [4MB] as card is handling main video output
Graphics aperture is confusing me.
if I set it at [4MB] then Norton says I have 1310240 Total Physical memory and 854152 free Physical memory
if I set it at [256MB] which coincides with number for card then Norton says I have 1310240 Total Physical memory and 821108 free Physical memory
So do I lose memory with this card if I set to 256 or should I set to a lower figure as aperture is not needed so high.
Thank you for your time
SDRAM RAS Precharge Time [3T]
This item controls the idle clocks after issuing a precharge command tothe SDRAM.
The SDRAM RAS Precharge Time parameter appears only when youset the SDRAM Configuration to [User Defined].
SDRAM RAS Active Time [6T]
This item allows you to select the RAS Active Time. Configuration options:[7T] [6T] [5T]
The SDRAM RAS Active Time parameter appears only when you setthe SDRAM Configuration to [User Defined].
SDRAM Command Lead-off Time [Auto]
This item allows you to select the SDRAM Head-off Time. Configurationoptions: [Auto] [2T] [1T]
The SDRAM CAS Latency parameter appears only when you set theSDRAM Configuration to [User Defined].
;,aphics Aperture Size [64MB]
This feature allows you to select the size of mapped memory for AGPgraphic data. Configuration options: [4MB] [8MB] [16MB] [32MB] [64MB][128MB] [256MB]
:-A6R Capability [4X Mode]
This motherboard supports the AGP 4X interface that transfers video dataat 1066MB/s. AGP 4X is backward-compatible, so you may keep thedefault [4X Mode] even if you are using an AGP 1 X or 2X video card.When set to [IX Mode], the AGP interface only provides a peak datathroughput of 266MB/s even if you are using an AGP 2X/4X card. Whenset to [2X Mode], the AGP interface provides a peak data trhoughput ofonly 533MB/s even if you are using an AGP 4X card.
Configuration options: [1 X Mode] [2X Mode] [4X Mode]
MiO'Fast Write Capability [Disabled]
Configuration options: [Disabled] [Enabled]
Onboard VGA Shared Memory Size [32M]
Configuration options: [4MB] [8MB] [16MB] [32MB] [64MB]
Video Memory Cache Mode [UC]
USWC (uncacheable, speculative write combining) is a new cachetechnology for the video memory of the processor. It can greatly improvethe display speed by caching the display data. You must set this to UC(uncacheable) if your display card does not support this feature, otherwisethe system may not boot. Configuration options: [UC] [USWC]MemoryHole At 15M-16M [Disabled]
This field allows you to reserve an address space for ISA expansion cards.Setting the address space to a particular setting makes that memoryspace unavailable to other system components. Expansion cards can onlyaccess memory up to 16MB. Configuration options: [Disabled] [Enabled]
PCI 2.1 Support [Enabled]
This field allows you to enable or disable the PCI 2.1 features. Keep thedefault setting [Enabled] if you installed PCI 2.1 compliant cards. Set to[Disabled] if you installed any card that is not PCI 2.1 compliant.Configuration options: [Disabled] [Enabled]
Onboard PCI IDE Enable [Both]
This field allows tou to enable either the primary IDE channel or secondaryIDE channel, or both. You can also set both channels to [Disabled].Configuration options: [Both] [Primary] [Secondary] [Disabled]
4-18Chapter4: BIOSSetupASUS P4S333-VMmotherboard user guide4-19