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ASUS P3V133 User’s Manual 57
4. BIOS SETUP
4. BIOS SETUP
CPU-DRAM Back-Back Transaction [Disabled]
Configuration options: [Enabled] [Disabled]
Delayed Transaction [Enabled]
When [Enabled], this frees the PCI Bus when the CPU is accessing 8-bit
ISA cards that normally consume about 50-60 PCI Clocks without PCI de-
layed transaction. Select [Disabled] for ISA cards that are not PCI 2.1 com-
pliant. Configuration options: [Enabled] [Disabled]
PCI to DRAM Prefetch [Disabled]
Configuration options: [Disabled] [Enabled]
Byte Merge [Disabled]
To optimize the data transfer on PCI, this merges a sequence of individual
memory writes (bytes or words) into a single 32-bit block of data. However,
byte merging may only be done when the bytes within a data phase are in a
prefetchable address range. Configuration options: [Disabled] [Enabled]
MD to HD Delay [Auto]
Configuration options: [Auto] [0 T] [1 T]
DRAM Operating Frequency [Auto]
By default, the BIOS automatically detects the DRAM type and allows the
DRAM to run at its optimal frequency. You may also set this in conjunction
with the Front Side Bus (FSB)/external frequency. For example, when you
set the external frequency to 133MHz, selecting [2/3 FSB] allows your
DRAM to run at 100MHz. Configuration options: [Auto] [FSB] [2/3 FSB]
AGP Capability [2X Mode]
This motherboard supports the AGP 2x interface, which transfers video data
at 533MB/s. Since AGP 2x is backward-compatible, you may leave the
default [2X Mode] on no matter you are using an AGP 1x or 2x video card.
When set to [1X Mode], the AGP interface will only provide a peak data
throughput of 266MB/s even if you are using an AGP 2x card. Configura-
tion options: [1X Mode] [2X Mode]
Graphics Aperture Size [64MB]
This feature allows you to select the size of mapped memory for AGP graphic
data. Configuration options: [4MB] [8MB] [16MB] [32MB] [64MB]
[128MB] [256MB]
Video Memory Cache Mode [UC]
USWC (uncacheable, speculative write combining) is a new cache technol-
ogy for the video memory of the processor. It can greatly improve the dis-
play speed by caching the display data. You must set this to UC (uncacheable)
if your display card cannot support this feature; otherwise your 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
that require it. Configuration options: [Disabled] [Enabled]
Chip Configuration