NTM6900 / WTM7026 Technical Reference
CPU F
AN
C
ONNECTION
O
PTIONS
The motherboard uses a 4-wire fan mounted on each CPU heat sink to ensure proper system operation.
These CPU fans connect to P28 for CPU1 and P31 for CPU2. Like the system fan connectors, these fans
make use of the ACPI soft control lines via jumpers W2 and W4. Jumper W4 is associated with P28 and
W2 works with P31. The factory default settings for W2 and W4 is CLOSED which enables speed control
for the CPU fans. If jumpers W2 and W4 are removed, the speed of the CPU fans will not be accurately
controlled.
Today’s processors have internal logic to prevent excessive temperatures from damaging the
CPUs should a failure occur with the system’s ACPI control signals. The
Advanced Setup
chapter in the
manual contains information on the motherboard’s ACPI BIOS settings. Motherboards that have BIOS
revision TTIRYF27 or later support the speed control functionality for the CPU fans.
S
YSTEM
F
AN
C
ONNECTION
O
PTIONS
The four chassis fan connections on the NTM6900 and WTM7026 motherboards are labeled: P25, P26,
P27 and P30. A system fan speed control jumper (W7, W6, W5 and W3) is associated with each system
fan connector and the position of this jumper determines speed control operation. Speed control operation
is a function of the fan type used in the chassis design. Three-wire fans and four-wire fans with a PWM
control line will behave differently depending on the jumper settings. These jumper settings are shown in
the system fan speed control table. The
Advanced Setup
chapter in the manual contains information on the
motherboard’s ACPI BIOS settings.
System Fan Speed Control Operation
P25 –> W7
P26 –> W6
P27 –> W5
P30 –> W3
4-Wire-System Fans
System fan speed controlled via ACPI soft
control commands
* = Factory default W# jumper setting
Closed* -
No
effect, system
fan speed max.
Closed* -
No
effect, system
fan speed max.
Closed* - System fan
under ACPI control
Closed* - System fan
under ACPI control
System fan speed runs at max speed all of
the time
Open –
No
effect, system
fan speed max
Open –
No
effect, system
fan speed max
Open –
System fan
speed range limited –
Not Recommended
Open –
System fan
speed range limited –
Not Recommended
3-Wire System Fans
System fan speed controlled via ACPI soft
control commands
* = Factory default W# jumper setting
Closed* -
No
effect, system
fan speed max.
Closed* -
No
effect, system
fan speed max.
Closed* - System fan
runs at max. speed
Closed* - System fan
runs at max. speed
System fan speed runs at max speed all of
the time
Open –
No
effect, system
fan speed ma
x
Open –
No
effect, system
fan speed max
Open –
System fan has
some limited speed
control
Open –
System fan has
some limit
ed speed
control
System fans connected to connectors P25 and P26 will always run at full speed because the W7
and W6 control jumpers have no effect regardless of position. Alternatively, system fans
connected to P27 or P30 may vary in speed based on the temperature sensor readings and the
associated ACPI soft control signal commands. The
Advanced Setup
chapter in the manual
contains information on the motherboard’s ACPI BIOS settings. Motherboards that have BIOS
revision TTIRYF27 or later support the speed control functionality for the system fans.
PCI E
XPRESS
O
PTION
C
ARD
S
LOT
C
ONFIGURATIONS
There are six PCI Express® option card slots supported on Trenton’s Extended ATX motherboards.
Five of
these slots (PCIe7, PCIe6, PCIe5, PCIe4 and PCIe2) support either PCI Express 2.0 or 1.1 option cards.
PCIe3 is a PCI Express slot dedicated to supporting PCIe 1.1 option cards. Slots 2, 4 and 6 are x16
mechanical slots driven with x8 PCIe electrical links. Slots 3, 5, and 7 are x8 mechanical slots driven with
x4 PCIe electrical links.
PCI C
ARD
S
LOT
C
ONFIGURATION
There is an additional PCI slot supported on the motherboard to enable a mix of option card bus
technologies. The PCI card slot is labeled PCI-1 and the slot is configured with a 32-bit/33MHz parallel
PCI bus interface. The motherboard’s PCI slot supports 5V or Universal PCI cards.
TRENTON Technology Inc.
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