Chapter 3
23
are [
1.4
] and [
1.1
].
(12) OS Select (For DRAM >64MB)
If your system's DRAM is larger than 64MB and you are running OS/2, select
OS/2 as the item value. Otherwise, set the item value to Non-OS/2 for all other
operating systems.
(13) HDD S.M.A.R.T. Capability
This field allows you to enable or disable the S.M.A.R.T. (Self-Monitoring,
Analysis and Reporting Technology) system that utilizes internal hard disk drive
monitoring technology. This parameter is normally disabled because the
resources used in the SMART monitoring feature may decrease system
performance.
(14) Video BIOS Shadow
These fields allow you to enable/disable the shadow feature for the Video
BIOS and the appropriate memory segment. Available options are [
Disabled
]
and [
Enabled
].
(15) Small Logo(EPA) Show
This setup allows photo that is EPA Logo.
(16) HDD Instant Recovery
This setup allows you to Enable/Disable your Hard Drive Instant Recovery.
3-3 Advanced Chipset Features
By choosing the [
Advanced Chipset Features
] option from the CMOS Setup Utility
menu (Figure 3-1), the screen below is displayed. This sample screen contains the
manufacturer's default values for the motherboard.
Figure 3-4 Advance Chipset Features
All of the above settings have been determined by the motherboard manufacturer and
should not be changed unless you are absolutely sure of what you are doing.
Explanation of the DRAM timing and chipset features setup is lengthy, highly technical
and beyond the scope of this manual. Below are some abbreviated descriptions of the
functions in this setup menu.
DRAM Clock/Drive Control
DRAM Clock
This selecting option allows you to control the DRAM speed.
Drive Control
The function allows you to enable or disable the DRAM timing by SPD. When
Chapter 3
24
set to Manual, you can select the DRAM CAS Latency, Bank Interleave,
Precharge to Active(Trp), Active to Precharge(Tras), Active to CMD(Trcd),
DRAM Burst Length, DRAM Queue Depth, DRAM Command Rate, Write
Recovery Time and DRAM tWTR configuration. It is recommended to keep the
default setting for stable system operation.
Precharge to Active(Trp)
This item controls the idle clocks after issuing precharge command to the
DRAM.
Active to Precharge(Tras)
This item controls the number of DRAM clocks used for DRAM parameters.
Active to CMD(Trcd)
This item controls the latency between DRAM active command and read/write
command.
DRAM CAS Latency
This item controls the latency between DRAM read command and the time the
data actually becomes available.
DRAM Command Rate
This item controls the DRAM Addr/Cmd Rates.
AGP & P2P Bridge Control
1. AGP Aperture Size
This function determines the amount of system memory that is given to the AGP card.
Options range from 4MB to 256MB. This is a dynamic memory allotment in that the
AGP card will only use the amount of memory that it needs. The remaining memory
not in use will be available for the system to use. For example, if 16MB is allotted to
the AGP card and the card only needs 8MB, the remaining 8MB will be available for
system use.
2. AGP Driving Control/Value
The [Manual] setting allows you to manually select the AGP driving value. However,
it is recommended that you keep the default setting [Auto] to allow the system to
automatically determine the appropriate AGP driving value.
3. AGP Fast Write
Selecting [
Enabled
] to allow Fast Write Protocol for 4X/2X AGP to function.
4. AGP Master 1 WS Write/Read
It is recommended to keep the default setting for stable system operation.
5. DBI Output for AGP Trans
Available options: [
Disabled
]/[
Enabled
]
CPU & PCI Bus Control
1. PCI 1/2 Master 0 WS Write
When Enabled, writes to PCI bus are executed with zero wait states.
2. PCI 1/2 Post Write
Enabling this function will enhance the system efficiency.
3. Vlink 8X Support
Available options: [
Disabled
]/[
Enabled
]
4. PCI Delay Transaction
The chipset has an embedded 32-bit posted write buffer to support delay transactions
cycles. Select Enabled to support compliance with PCI specification version 2.1.
Memory Hole
Enabling this function will reserve the memory address space between 15MB and
16MB for ISA expansion cards. However, enabling this function will result in not
allowing the system to have access to memory above 16MB. Please note that some
expansion cards require this setting to be enabled. The default setting is Disabled. If
