Tyan Computer TIGER S5350 - Manual (Page 42)

Tiger i7320 S5350 Chapter 3: BIOS Setup
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thermal monitor’s control circuit, when active, lowers the CPU temperature by
throttling the internal CPU clock speed. This is done with a 50% duty-cycle, which
means that a 2GHz CPU will then effectively run at a 1GHz clock speed. Due to the
fast response time of the thermal monitor circuit (~50ns) the CPU will only be
‘throttled’ for a very brief period. Once the CPU-die temperature is within safe
operating limits again it’ll set back to the 2GHz clock speed it originally operated at.
• Thermal Monitor 2: Thermal Monitor 2 decreases or increases the CPU clock and
core voltage according to the CPU load. This information is read from the five VID
pins of the CPU. Accordingly, the CPU temperature is also automatically decreased,
when the core voltage is decreased. This improves the CPU lifespan. The states
switch is so fast that the performance decrease is insignificant.
Enabled / Disabled
Set Max Ext CPUID=3
Sets Max CPUID extended function value to 3.
Disabled / Enabled
3.4.4 I/O Device Configuration
This setting allows you to configure I/O devices.
Serial Port A:
This defines how the first serial port is detected and configured.
Disabled / Enabled
Base I/O Address:
Set the base I/O address for serial port A.
3F8 / 2F8 / 3E8 / 2E8
Interrupt:
Set the interrupt for serial port A.
IRQ3 / IRQ4