User`s guide

Frequently Asked Questions
B-7
immediately resume to your original work without the long time waiting from
bootup, entering Win95 and running Winword. The AX5T with Intel TX
chipset can support ACPI.
Q: What is ATX Soft Power On/Off and Momentary Switch?
A: The Soft Power On of the ATX specification means to provide a standby
current for special circuit to wait for wakeup event when main power is off.
For example, Infrared wakeup, modem wakeup, or voice wakeup. Currently,
the most simple usage is to provide standby current for power switch circuit
so that power switch can turn on/off the main power through soft power
control pin. The ATX power specification does not mention anything about
the power switch type. You can use toggle or momentary switch, note that
ACPI specification requires momentary switch for power state control. All
the AOpen ATX MBs support momentary switch and AX5T/AX58/AX6L
support modem wakeup (Modem Ring-On).
Soft Power Off me ans to turn off system through software, Windows 95
Shutdown function can be used to verify if your mainboard supports soft
power off. AOpen AX5T/AX58/AX6F/AX6L support soft power off.
Q: What is the AGP (Accelerated Graphic Port)?
A: AGP is a PCI-like bus interface targeted for high-performance 3D graphic.
AGP supports only memory read/write operation and single-master single-
slave one-to-one only. The AGP uses both rising and falling edge of the
66MHz clock and produces 66MHz x 4byte x 2 = 528MB/s data transfer rate.
The AOpen AX6L MB are designed to support AGP via the new Intel
Klamath LX chipset.
Q: Which Pentium chipset has the best performance?
A: The performance difference of chipset depends on what kind of DRAM they
use and the DRAM timing they support. (They all use PBSRAM, so that the
difference is very little at 2nd level cache.)
The following table lists the read timing of current available chipsets. The
four digital represents the clocks needed for 1st-2nd-3rd-4th QWord. Notice
that the Intel HX + EDO or SIS 5571+ EDO are almost the same as VX +
SDRAM and the TX + SDRAM has the best performance among Pentium
chipsets. Please note AP57 does not support SDRAM.
P5 Chipset Model PBSRAM FPM EDO SDRAM