Asus P4XP-X User Manual - Page 50

Memory Hole At 15M-16M [Disabled]

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CKx8 Strength Control [2.00x] This item controls the drive strength of the DDR SDRAM clock signal for an x8 device. It is recommended to keep the default setting for stable system operation. Configuration options: [0.75x] [1.00x] [1.25x] [1.50x] [2.00x] [2.50x] [3.00x] [4.00x] DQ DQS Strength Control [2.00x] This item controls the drive strength of the DDR SDRAM signals DQ and DQS. It is recommended to keep the default setting for stable system operation. Configuration options: [0.75x] [1.00x] [1.25x] [1.50x] [2.00x] [2.50x] [3.00x] [4.00x] Graphics Aperture Size [128MB] This feature allows you to select the size of mapped memory for AGP graphic data. Configuration options: [128MB] [256MB] AGP Capability [4X Mode] This motherboard supports the AGP 4X interface that transfers video data at 1066MB/s. AGP 4X is backward-compatible, so you may keep the default [4X Mode] even if you are using an AGP 1X video card. When set to [1X Mode], the AGP interface only provides a peak data throughput of 266MB/s even if you are using an AGP 4X card. Configuration options: [1X Mode] [4X Mode] Video Memory Cache Mode [UC] USWC (uncacheable, speculative write combining) is a new cache technology for the video memory of the processor. It can greatly improve the display speed by caching the display data. You must set this to UC (uncacheable) if your display card does not support this feature, otherwise the system may not boot. Configuration options: [UC] [USWC] Memory Hole 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 memory space unavailable to other system components. Expansion cards can only access memory up to 16MB. Configuration options: [Disabled] [Enabled] Delay Transaction [Enabled] When set to [Enabled], this feature frees the PCI bus when the CPU is accessing 8-bit ISA cards. This process normally consumes about 50-60 PCI clocks without PCI delayed transaction. Set this field to [Disabled] when using ISA cards that are not PCI 2.1 compliant. Configuration options: [Disabled] [Enabled] Onboard PCI IDE [Both] This field allows you to enable either the primary IDE channel or secondary IDE channel, or both. You can also set both channels to [Disabled]. Configuration options: [Both] [Primary] [Secondary] [Disabled] 2-20 Chapter 2: BIOS information

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2-20
Chapter 2: BIOS information
CKx8 Strength Control [2.00x]
This item controls the drive strength of the DDR SDRAM clock signal for an x8
device. It is recommended to keep the default setting for stable system operation.
Configuration options: [0.75x] [1.00x] [1.25x] [1.50x] [2.00x] [2.50x] [3.00x] [4.00x]
DQ DQS Strength Control [2.00x]
This item controls the drive strength of the DDR SDRAM signals DQ and DQS. It is
recommended to keep the default setting for stable system operation.
Configuration options: [0.75x] [1.00x] [1.25x] [1.50x] [2.00x] [2.50x] [3.00x] [4.00x]
Graphics Aperture Size [128MB]
This feature allows you to select the size of mapped memory for AGP graphic data.
Configuration options: [128MB] [256MB]
AGP Capability [4X Mode]
This motherboard supports the AGP 4X interface that transfers video data at
1066MB/s. AGP 4X is backward-compatible, so you may keep the default [4X
Mode] even if you are using an AGP 1X video card. When set to [1X Mode], the
AGP interface only provides a peak data throughput of 266MB/s even if you are
using an AGP 4X card. Configuration options: [1X Mode] [4X Mode]
Video Memory Cache Mode [UC]
USWC (uncacheable, speculative write combining) is a new cache technology for
the video memory of the processor. It can greatly improve the display speed by
caching the display data. You must set this to UC (uncacheable) if your display
card does not support this feature, otherwise the system may not boot.
Configuration options: [UC] [USWC]
Memory Hole 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 memory space unavailable to
other system components. Expansion cards can only access memory up to 16MB.
Configuration options: [Disabled] [Enabled]
Delay Transaction [Enabled]
When set to [Enabled], this feature frees the PCI bus when the CPU is accessing
8-bit ISA cards. This process normally consumes about 50-60 PCI clocks without
PCI delayed transaction. Set this field to [Disabled] when using ISA cards that are
not PCI 2.1 compliant. Configuration options: [Disabled] [Enabled]
Onboard PCI IDE [Both]
This field allows you to enable either the primary IDE channel or secondary IDE
channel, or both. You can also set both channels to [Disabled]. Configuration
options: [Both] [Primary] [Secondary] [Disabled]