Abit IT7-MAX2, User Manual

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3-12 Chapter 3
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DRAM RAS# Precharge:
This item controls the idle clocks after issuing a precharge command to the DRAM.
DRAM Data Integrity Mode:
Two options are available: ECC and Non-ECC. The default setting is
Non-ECC
. This option is used to
configure the type of DRAM in your system. ECC is “Error Checking and Correction”. Choose the ECC
option only when your memory is ECC type.
Dram Read Thermal Mgmt:
This option controls the thermal management of DRAM module. The default setting is Disabled .
System BIOS Cacheable:
You can select Enabled or Disabled. The default setting is Enabled . When you select Enabled allows
caching of the system BIOS ROM at F0000h-FFFFFh, resulting in better system performance. However,
if any program writes to this memory area, a system error may result.
Video BIOS Cacheable:
You can select Enabled or Disabled. The default setting is Enabled . Enabled allows caching of the video
BIOS, resulting in better system performance. However, if any program writes to this memory area, a
system error may result.
Video RAM Cacheable:
Two options are available: Enabled and Disabled. The default setting is Disabled . Enabled allows you to
get faster video RAM executing speed via the L2 cache. You must check your VGA adapter
documentation to see if any compatibility problem will occur.
Memory Hole At 15M-16M:
Two options are available: Enabled and Disabled. The default setting is
Disabled
. This option is used to
reserve the memory block 15M-16M for ISA adapter ROM. Some special peripherals need to use a
memory block located between 15M and 16M, and this memory block has a size of 1M. We recommend
that you disable this option.
Delayed Transaction:
Two options are available: Enabled and Disabled. The default setting is Disabled . Set the option to
enabled or disabled PCI 2.1 features including passive release and delayed transaction for the chipset.
This function is used to meet the latency of PCI cycles to or from the ISA bus. This option must be
enabled to provide PCI 2.1 compliance. If you have an ISA card compatibility problem, you can try to
enable or disable this option for optimal results.
AGP Aperture Size:
The options are: 4, 8, 16, 32, 64, 128, and 256MB. The default setting is 64MB . This option specifies the
amount of system memory that can be used by the AGP device. 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. See www.agpforum.org for AGP information.
IT7-MAX2