3. Installing Thermal Sensor

The Thermal Sensor Connector (CN12 & CN1) provides you to use the thermal sensor to detect the CPU temperature of the components on the motherboard.

GND

Sensor

4. SW3 Select CPU Type

This motherboard supports DUAL processors for Intel PentiumII / Pentium!!!, and Celeron CPU (applied to PPGA package only, must lower than 300MHz). Please refer to the following table for detail. It is not recommended to change the default setting, unless the system fails to boot and you’re trying to troubleshoot.

5. SW1 Setting CPU FSB Frequency & Ratio

When you are using the Intel® engineer sample CPU with DX34/DX34Plus, the SW1 allows you select the CPU ratio from 2x to 9.5 x. You can adjust the SW1 to get the correct CPU working ratio and frequency.

ONOFF

1

SW1

Warning: We strongly recommend you do not overclocking your CPU and system for get more system reliability.

 

 

Bit1

 

Bit2

 

Bit3

 

Bit4

 

Ratio

 

Frequency

 

Frequency

 

 

 

 

 

 

 

 

 

(FSB100)

 

(FSB133)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

On

 

On

 

On

 

On

 

X2

 

200

 

266

 

 

 

 

On

 

Off

 

On

 

On

 

X2.5

 

250

 

333

 

 

 

 

On

 

On

 

Off

 

On

 

X3

 

300

 

400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

OFF

ON

SW3

2

1

 

 

2

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

ON

 

 

 

 

 

 

 

 

 

 

 

(Default)

 

 

 

Processor CPU Package

Configuration

PentiumII

 

 

Single Processor Pentium!!!

All

Default

Celeron

 

 

PentiumII

All

Default

Dual Processor Pentium!!!

PPGA

Set the SW3 to OFF

Celeron

Celeron

FC-PGA

Not Supported

 

 

On

 

Off

 

Off

 

On

 

X3.5

 

350

 

466

 

 

 

 

On

 

On

 

On

 

Off

 

X4

 

400

 

533

 

 

 

 

On

 

Off

 

On

 

Off

 

X4.5

 

450

 

600

 

 

 

 

On

 

On

 

Off

 

Off

 

X5

 

500

 

667

 

 

 

 

On

 

Off

 

Off

 

Off

 

X5.5

 

550

 

733

 

 

 

 

Off

 

On

 

On

 

On

 

X6

 

600

 

800

 

 

 

 

Off

 

Off

 

On

 

On

 

X6.5

 

650

 

866

 

 

 

 

Off

 

On

 

Off

 

On

 

X7

 

700

 

933

 

 

 

 

Off

 

Off

 

Off

 

On

 

X7.5

 

750

 

1000

 

 

 

 

Off

 

On

 

On

 

Off

 

X8

 

800

 

1066

 

 

 

 

Off

 

Off

 

On

 

Off

 

X8.5

 

850

 

1133

 

 

 

 

Off

 

On

 

Off

 

Off

 

X9

 

900

 

1200

 

 

 

 

Off

 

Off

 

Off

 

Off

 

X9.5

 

950

 

1266

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 3
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AOpen DX34 PLUS manual Installing Thermal Sensor, SW3 Select CPU Type, SW1 Setting CPU FSB Frequency & Ratio

DX34 PLUS, DX34 specifications

The AOpen DX34 and DX34 Plus are notable examples of early computer motherboards designed for the Intel Pentium processors. Launched in the mid-1990s, these motherboards catered to the growing demand for robust and versatile PC platforms, emphasizing compatibility, performance, and expandability.

One of the primary features of the AOpen DX34 is its support for Intel’s Socket 5, which was designed for the Pentium series of CPUs. This allowed users to harness the power of early Pentium processors with clock speeds initially ranging from 60MHz to 120MHz. The DX34 Plus model further enhanced this capability, supporting faster processors and offering better thermal management solutions.

The DX34 series is built upon the Intel 440FX chipset, widely praised for its stability and performance at the time. This chipset provided essential features such as integrated support for Level 2 cache, which significantly improved data processing speeds by storing frequently accessed information closer to the CPU. The inclusion of the PCI (Peripheral Component Interconnect) bus provided compatibility with a range of expansion cards, allowing users to configure their systems according to their needs.

Another noteworthy characteristic of the AOpen DX34 and DX34 Plus is their memory support. The motherboards accommodated up to 512MB of EDO (Extended Data Out) DRAM, utilizing three DIMM slots. This made the boards suitable for numerous applications, from gaming to business tasks, ensuring optimal performance as software demands increased.

In terms of connectivity, the AOpen DX34 series featured several expansion slots, including PCI, ISA, and a few ISA bus slots, allowing users to add sound cards, network cards, and more. These expansions offered flexibility and customization, making it easier to upgrade systems as technology evolved.

Overall, the AOpen DX34 and DX34 Plus represent a significant step in the evolution of computer technology during their era. With their focus on processor support, robust memory options, and versatile expansion capabilities, these motherboards laid the groundwork for more advanced computing solutions in the years that followed. They exemplify the innovation and engineering that helped shape the modern PC landscape, and their influence can still be felt in contemporary hardware designs.