Intel(R) Corporation

Intel® Desktop Board CN430TX

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Software and drivers
Bios and drivers

Product Documentation
icon Technical Product Specification
icon Specification Update

Compatibility
Supported processors

The Intel® Desktop Board CN430TX supports these Intel® Pentium® Processors:

Processor Family

Processor Speed

Pentium Processors

90 MHz
100 MHz
120 MHz
133 MHz
150 MHz
166 MHz
200 MHz

Pentium Processors
With MMX™ Technology

166 MHz
200 MHz
233 MHz

Changing the processor requires changes in several jumper settings.

Warning: Processors not specifically listed by type and rated speed may have requirements that are not supported by the motherboard's design. Use of these processors may result in improper operation, damage to the motherboard or processor, or reduced product life.

System memory

Important Notes

System Memory Combinations

The motherboard has two 168-pin DIMM sockets. Memory can be installed in one or two sockets. Minimum memory size is 8 MB. The maximum memory size is 256MB. The BIOS automatically detects memory type, size, and speed so no jumper settings are required.

The motherboard supports the following:

  • 168-pin 3.3 V DIMMs with gold-plated contacts
  • 60 and 66 MHz bus speeds
  • 60ns 3.3V EDO DRAM
  • 60ns unrestricted CAS Latency 2 unbuffered 4-clock 3.3V SDRAM
  • Caching for the first 64 MB of main memory
  • 64-bit data path
The motherboard supports single- or double-sided DIMMs in the following sizes:

DIMM Size Type Configuration Technology
8 MB 60ns EDO 1M x 64 16 M bit
16 MB 60ns EDO 2M x 64 16 M bit
32 MB 60ns EDO 4M x 64 16 M bit
64 MB 60ns EDO 8M x 64 16 M bit
128 MB 60ns EDO 16M x 64 64 M bit
8 MB CAS Latency 2 SDRAM 1M x 64 16 M bit
16 MB CAS Latency 2 SDRAM 2M x 64 16 M bit
32 MB CAS Latency 2 SDRAM 4M x 64 16 M bit
64 MB CAS Latency 2 SDRAM 8M x 64 64 M bit
128 MB CAS Latency 2 SDRAM 16M x 64 64 M bit

Memory type, size, and speed can vary between sockets, so EDO and SDRAM can be installed on the same motherboard. Parity (x 72) DIMMs can be installed but are not recommended for the following reasons:

The motherboard does not provide parity checking or ECC Parity DIMMs cause excessive capacitive loading on memory data and address lines.

DIMM Vendors - Web Sites

The list below contains vendors that have tested their memory for Intel® Desktop Board CN430TXs, and that have their products listed on their own website. Please visit their sites to obtain information on their products.

DIMM Vendors - EDO DIMMs
EDO DRAM improves memory read performance by holding the memory data valid until the next CAS# falling edge, unlike fast page mode DRAM, which tri-states the memory data when CAS# negates to pre-charge for the next memory cycle. With EDO DRAM, the CAS# pre-charge overlaps the data-valid time, which allows CAS# to negate earlier while still satisfying the memory data-valid window. EDO DIMMs should meet the Intel 60ns 64-bit 3.3v unbuffered EDO DIMM v1.2 specification.

The following tables list DIMMs that have been tested. DIMMs that are not listed should also function properly as long as their specifications are compatible with the devices listed below. In general, DIMM devices that are faster than those specified for a given platform will work, although no extra performance will be realized.

Vendor* Test Vendor Part Number
1M x 64 (8MB), Non-parity, 60ns
Micron Technology  Full MT4LD164AG-6X
2M x 64 (16MB), Non-parity, 60ns
Micron Technology Full MT8LD264AG-6X
4M x 64 (32MB), Non-parity, 60ns
Micron Technology  Full  MT16LD464AG-6X
8M x 64 (64MB), Non-parity, 60ns
Micron Technology Full MT8LD864AG-6X
16M x 64 (128MB), Non-parity, 60ns
None at this time.    

DIMM Vendors - SDRAM DIMMs
Synchronous DRAM (SDRAM) is designed to improve main memory performance. Unlike fast page or EDO DRAM, SDRAM is synchronous with the memory clock. This simplifies the timing design and increases memory speed because all timing is dependent on the number of memory clock cycles. SDRAM DIMMs should meet the Intel 4-clock 66 MHz 64-bit unbuffered SDRAM DIMM v1.0 specification.

Caution The board does not support SDRAM DIMMs with an n x 4 DRAM base due to loading anomalies. For example, a DIMM that uses sixteen 16Mbit x 4 devices should not be used.
Note The Intel CN430TX Motherboard supports unbuffered, 4-clock 3.3V SDRAM DIMMs only. Buffered, 5V, or 2-clock SDRAM DIMMs cannot be used.

The following tables list DIMMs that have been tested. DIMMs that are not listed should also function properly as long as their specifications are compatible with the devices listed below. In general, DIMM devices that are faster than those specified for a given platform will work, although no extra performance will be realized.

Vendor* Test Vendor Part Number
1M x 64 (8MB), Non-Parity, 4CLK, 66MHz
NEC Full MC451AB644F-A67
2M x 64 (16MB), Non-Parity, 4CLK, 66MHz
Micron Technology Full MT8LSDT264AG-66CL2
Micron Technology Full MT8LSDT264AG-66CL2_BDie
NEC Full MC452AB644F-A67
Samsung Full KMM366S203BTN-G2
4M x 64 (32MB), Non-Parity, 4CLK, 66MHz
Micron Technology Full MT16LSDT464AG-66CL2
Micron Technology Full MT16LSDT464AG-66CL2_BDie
NEC Full MC454AD644F-A67
Samsung Full KMM366S424ATL-G2
TI Full TM4SN64EPU-12A
8M x 64 (64MB), Non-Parity, 4CLK, 66MHz
NEC Full MC458CB644F-A10
Samsung  Full  KMM366S823AT1-G2
16M x 64 (128MB), Non-Parity, 4CLK, 66MHz
Micron Technology Full MT16LSDT1664AG-66CL
Samsung Full KMM366S1623AT1-G2


Installation and use
Last known issues

Processors Supported
The Intel® Desktop Board CN430TX supports the Intel® Pentium® processors at 90, 100, 120, 133, 150,166 and 200 MHz, as well as Pentium processors with MMX® technology running at 166, 200 and 233 MHz. Changing the processor requires changes in several jumper settings. See additional information on processors supported in the compatibility section above.

Warning: Processors not specifically listed by type and rated speed may have requirements that are not supported by the motherboard's design. Use of these processors may result in improper operation, damage to the motherboard or processor, or reduced product life.

System Memory
Information on system memory requirements and a list of tested parts for the Intel® Desktop Board CN430TX is listed in the compatibility section above.

UltraDMA drives under Windows* 95
UltraDMA drives are supported under Windows 95, but you may need the Intel® Chipset Software Installation Utility to enable Windows 95 to recognize the advanced features of the Intel® 82371AB PIIX4 IDE Controller.

Windows* 95 with CD-ROM or second hard drive
Having problems with Windows* 95 and a CD-ROM or second hard drive? There are two known issues that may be affecting your system: you may need to update Windows* 95 to recognize the Intel® 82371AB PIIX4 IDE Controller, or your IDE CD-ROM may not comply with the ATAPI specification.

Yellow question marks in Configuration Manager
Seeing yellow question marks in the Windows 95 Configuration Manager next to the entries for the PCI-ISA bridge and the Power Management PIIX4 device? This suggests you may need to run the Intel® Chipset Software Installation Utilityto update Windows 95 to recognize the IDE Controller

Gold-plated DIMMs
Only gold-plated DIMMs should be used with the Intel CN430TX Motherboard.

Power supply requirements
The Intel® Desktop Board CN430TX requires a power supply that meets the NLX 1.2 specification. See the Intel® Desktop Board CN430TX Technical Product Specification above for any additional considerations.

NLX chassis, I/O shields and riser cards
Intel® Desktop Board CN430TXs fit in a standard NLX chassis, whose vendor should also supply the required mounting rails. Intel supplies I/O shields for its NLX motherboards, but riser cards (which are chassis-dependent) must be separately sourced. The developer.intel.com site is the gateway to complete information about the NLX form factor.

Will my ATA-66 hard drive work on the Intel® Desktop Board CN430TX?
The IDE controller integrated into the Intel® Desktop Board CN430TX supports Ultra DMA modes 0,1, and 2. Ultra DMA mode 2, also known as ATA-33 or Ultra DMA 33, is the highest speed transfer mode supported by the Intel® Desktop Board CN430TX. The motherboard hardware cannot support the maximum transfer rate of the ATA-66 drives. A drive that complies with the ATA-66 specification will run timings up to Ultra ATA-33 on the Intel® Desktop Board CN430TX.

Additional information

For technical support, contact your place of purchase -- which will have the most current information about your specific product or configuration. You also can check the Intel FAQ for that product.

What Pentium® processors are supported on the Intel CN430TX Motherboard? The Intel® Desktop Board CN430TX supports Pentium® processors at 90, 100, 120, 133, 150, 166 and 200 MHz, as well as Pentium processors with MMX™ technology running at 166, 200 and 233 MHz. Changing the processor requires changes in several jumper settings.

Warning: Processors not specifically listed by type and rated speed may have requirements that are not supported by the motherboard's design. Use of these processors may result in improper operation, damage to the motherboard or processor, or reduced product life.

How should the switches and jumpers be set on my motherboard?
On-board switches and jumpers control the configuration options and other features of the motherboard. Check the jumpers document for the Intel® Desktop Board CN430TX.

Does the Intel® Desktop Board CN430TX support UltraDMA drives under Windows* 95? Some versions of Windows* 95 are unable to completely identify the 82371AB (PIIX4) and 82439TX (MTXC) components on the Intel® Desktop Board CN430TX. A utility is available to update the MSHDC.INF and MACHINE.INF files. After this utility has been run, the enhanced functions of the PIIX4 IDE controller can be accessed.

Why do I get a yellow question mark in Windows* 95's Device Manager? Even after the INF update utility has been run, a single yellow question mark icon (PCI Card) may still remain under the Other Devices section in the Windows 95 Control Panel / System Properties / Device Manager. This yellow question mark indicates that the USB function of the PIIX4 component has been identified, but Windows 95 does not have a driver for this function. There is no current method to remove this yellow question mark from the Device Manager screen. This yellow question mark does not indicate any problems with the system, but simply that the USB function of the PIIX4 controller is not active.

Does the Intel® Desktop Board CN430TX support USB keyboard and mouse devices with legacy operating systems?
Not at this time. Only Plug and Play (PnP) operating systems such as Windows* 95 currently support USB keyboard and mouse devices. BIOS support for these USB devices is required for non-PnP (legacy) operating systems. A BIOS upgrade is planned that will support USB keyboard and mouse devices with legacy operating systems.