Chapter 4: AMI BIOS
4-9
Hysteresis Temperature (Closed Loop Only)
Temperature Hysteresis is the temperature lag (in degrees Celsius) after the
preset DIMM temperature threshold is reached before Closed Loop Throt-
tling begins. The options are Disabled,
1.5
o
C
, 3.0
o
C, and 6.0
o
C.
Guardband Temperature (Closed Loop Only)
This is the temperature applied to the DIMM temperature threshold. Each
step is in 0.5oC increment. The default is
[006]
.
Inlet Temperature
This is the temperature detected at the chassis inlet. Each step is in 0.5
o
C
increment. The default is
[070]
.
Temperature Rise
This is the temperature rise to the DIMM thermal zone. Each step is in
0.5
o
C increment. The default is
[020]
. Press "+" or "-" on your keyboard to
change this value.
Air Flow
This is the air fl ow speed to the DIMM modules. Each step is one mm/sec.
The default is
[1500]
.
Altitude
This feature defi nes how many meters above or below sea level the system
is located. The options are
Sea Level or Below,
1~300, 301~600, 601~900,
901~1200, 1201~1500, 1501~1800, 1801~2100, 2101~2400, 2401~2700,
2701~3000.
DIMM Pitch
This is the physical space between each DIMM module. Each step is in
1/1000 of an inch. The default is
[400]
.
North Bridge Confi guration
This feature allows the user to confi gure the settings for the North Bridge chip.
Crystal Beach/DMA (Direct Memory Access)
This feature works in conjunction with the Intel I/O AT (Acceleration Technology)
to accelerate the performance of TOE devices. (
Note
: A TOE device is a special-
ized, dedicated processor that is installed on an add-on card or a network card to
handle some or all packet processing of this add-on card.) When this feature is set
to Enabled, it will enhance overall system performance by providing direct memory
access for data transferring. The options are Enabled and
Disabled.
