Historical Archive - Intel® AN430TX Motherboard

Compatibility

Supported processors

The Intel® AN430TX Motherboard 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

The motherboard has two 168-pin DIMM sockets. Memory can be installed in one or two sockets. Minimum memory size is 8 MB. Maximum memory size is 128 MB for EDO and 256 MB for SDRAM. 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
60 ns 3.3V EDO DRAM
66 Mhz unrestricted CAS Latency 2 unbuffered 4-clock 3.3V SDRAM
Caching for the first 64 MB of main memory
64-bit data path
Single- or double-sided DIMMs in the following sizes:

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

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® AN430TX Motherboards, 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 precharge for the next memory cycle. With EDO DRAM, the CAS# precharge 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.

Caution

Due to loading anomalies, using EDO DIMMs with a n x 4 DRAM base in the Intel AN430TX Motherboard is not recommended. For example, a DIMM that uses sixteen 16 Mbit x 4 devices should not 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	Comments
1H x 64 (8 MB)	Unbuffered EDO	Non-parity-60ns	None
2H x 64 (16 MB)	Unbuffered EDO	Non-parity - 60ns	None
Micron Technology	Full	MT8LSDT264AG-662C1	None
Micron Technology	Full	MT8LD264AG-6	None
NEC	Full	MC452AB645F-A10	None
Unigen	Full	UG52W6628GSG-6	None
4M x 64 (32 MB)	Unbuffered EDO	Non-parity-60ns	None
Micron Technology	Full	MT16LSDT464AG-662C1	None
Unigen	Full	UG54W6646HSG-5	None
8M x 64 (64 MB)	Unbuffered EDO	Non-parity-60ns	None
Unigen	Full	UG58W6646HSG-5	None
Unigen	Full	UG58W6646HSG-5	None

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 16 Mbit x 4 devices should not be used.

Note

The Intel AN430TX Motherboard supports unbuffered, 4-clock 3.3V SDRAM DIMMs only. Buffered, 5V, or 2-clock SDRAM DIMMs cannot be used.

Vendor*	Test	Vendor Part Number	Comments
1M x 64 (8 MB)	Unbuffered SDRAM	Non-parity-66Mhz	None
2M x 64 (16 MB)	Unbuffered SDRAM	Non-parity - 66MHz	None
Hitachi	Full	HB526264DB	None
Micron Technology	Full	MT8LSDT264AG-66CL2	Rev B only
NEC	Full	MC452AB644FA67	None
Texas Instruments	Full	TM2SN64EPU-12A	None
4M x 64 (32 MB)	Unbuffered SDRAM	Non-parity-66MHz	None
Micron Technology	Full	MT16LSDT464AG-66CL2	None
NEC	Full	MC454AD644F-A10	None
Unigen	Full	UG54S6608GSG-G0	None
8 x 64 (64 MB)	Unbuffered SDRAM	Non-parity-66MHz	None
NEC	Full	MC458CB644F-A10	None
16 x 64 (128 MB)	Unbuffered SDRAM	Non-parity-66MHz	None

DIMM Vendors - SDRAM ECC DIMMs
Error checking and correcting (ECC) memory detects multiple-bit errors and corrects single-bit errors. When ECC memory is installed, the BIOS supports both ECC and non-ECC mode. ECC mode is enabled in the Setup program. The BIOS automatically detects if ECC memory is installed and provides the Setup option for selecting ECC mode. If any non-ECC memory is installed, the Setup option for ECC configuration does not appear and ECC operation is not available.

The following table describes the effect of using Setup to put each memory type in each supported mode. Whenever ECC mode is selected in Setup, some performance loss occurs. Memory Error Detection Mode Established in Setup ProgramECC Disabled ECC EnabledNon-ECC DIMM No error detection N/A ECC DIMM No error detection Single-bit error correction, multiple-bit error detection

Vendor*	Test	Vendor Part Number	Comments
2M x 64 (16 MB)	Unbuffered SDRAM	ECC-66MHz	None
4M x 72 (32 MB)	Unbuffered SDRAM	ECC-66MHz	None
8Mbit x 72 (64 MB)	Unbuffered SDRAM	ECC-66MHz	None
Micron Technology	Full	MT9LSDTAG-662D3	None
4M x 72 (82 MB)	Unbuffered SDRAM	ECC-66MHz	None
16Mbit x 72 (128 MB)	Unbuffered SDRAM	ECC-66MHz	None

Installation and use

Last known issues: Contact your system provider for any bus mastering drivers specific to your configuration. Additional Intel® Bus Master IDE information can be found on the developer.intel.com site.

Processors Supported
The Intel® AN430TX Motherboard supports 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.

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.

Windows* 95 power-down issues
Intel has received reports from users who have experienced system hangs or long delays when shutting down from Windows 95. See shutdown issues with Windows* 95 below for more information.

Audio drivers and Windows* NT* 4.0
If you have difficulty installing audio drivers with Windows NT 4.0, check the installation instructions found in the included README.TXT file. These steps must be followed exactly to successfully install the drivers.

Optional graphics memory
Intel® AN430TX Motherboard with the optional ATI Rage* II+ graphics controller come with 2 MB of video memory installed. It is not possible to install additional video memory on this motherboard.

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.

Booting from large IDE hard drives
Some large IDE drives may not initialize quick enough for the system to boot. Try setting the "Quick Boot" option in the BIOS Setup utility to disable. Another option is to warm boot the system by pressing CTRL-ALT-DELETE when the "No Operating System Found" message appears.

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 Utility to update Windows 95 to recognize the IDE Controller.

USB device cannot be disabled
It is not possible to disable the USB Device in the PIIX4 IDE Controller. This device always will appear in the Windows 95 Configuration Manager. The resources cannot be released for use by other devices.

Motherboard won't power up
If the motherboard won't power up, or the fan turns on for one second then shuts down, ensure you are using a momentary switch for the sleep/resume feature. The result may be the board getting stuck in sleep mode. Use the correct type of switch and remove the battery for 20 minutes to clear the flip-flop that controls sleep mode.

Turning power off during POST
Turning your system power off may take up to four seconds while the BIOS is performing the Power On Self Test (POST). Simply depress and hold the power on/off button until the system powers down.

Will my ATA-66 hard drive work on the Intel® AN430TX Motherboard?
The IDE controller integrated into the Intel® AN430TX Motherboard 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® AN430TX Motherboard. 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® AN430TX Motherboard.

Additional information

What Intel® Pentium® processors are supported on the Intel® AN430TX Motherboard?
The Intel® AN430TX Motherboard 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.

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 do I upgrade to the latest BIOS for the Intel® AN430TX Motherboard?
BIOS upgrade files are available above in the software and drivers section. The BIOS identifier for the Intel® AN430TX Motherboard is 4A3NT0X0.86A.

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® AN430TX Motherboard.

Why does does my Intel® AN430TX Motherboard not power-up?
The Intel® AN430TX Motherboard requires 3.3 volts from the power supply. A momentary switch should be used for the for the power on/off switch and the sleep/resume switch.

Why doesn't my CD-ROM or second IDE hard drive work with Windows* 95?
There are two known issues involving CD-ROM drives:

The retail version of Microsoft Windows* 95 may not recognize the Intel 82371AB PIIX4 IDE controller used on Intel motherboards, causing the BIOS to disable the secondary IDE channel. This can result in IDE devices (such as CD-ROM drives) not being detected or disappearing after the system is rebooted. Windows 95 also may fail to recognize a CD-ROM drive that does not comply with the ATAPI specification.

Is it possible to have a second serial port on the Intel® AN430TX Motherboard?
The Intel® AN430TX Motherboard has one serial port located on the ATX I/O back panel and a motherboard header for cabling a second serial port.

Does the Intel® AN430TX Motherboard 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® AN430TX Motherboard. 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® AN430TX Motherboard 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.

Should I use DIMMs with tin- or gold-plated contacts on the Intel® AN430TX Motherboard?
Only gold-plated DIMMs should be used with the Intel® AN430TX Motherboard. Do NOT use DIMMs with tin-plated contacts with this board. The original Intel® AN430TX Motherboard Technical Product Specification (order code 282955-001) erroneously mentions tin-plated DIMMs.

Why doesn't my Intel® AN430TX Motherboard boot from a large hard drive?
Large IDE hard drives may fail to initialize before the system boots. This issue is planned to be resolved in a future BIOS by adding a "Hard Disk Pre-Delay" option to the "Main" menu in BIOS CMOS Setup. This will allow you to modify the time which the BIOS waits for the IDE hard drive to initialize.

You may be able to boot your system by setting the "Quick Boot" option to "Disable" in BIOS CMOS Setup. Another option is to "warm boot" the system by pressing the <ctrl> <alt> <del> keys simultaneously when the "No Operating System Found" message appears.

Windows* 95 Shutdown Issues

Intel has received reports from users who have experienced system hangs or long delays when shutting down from Windows* 95. If you are seeing this issue, please try the following:

Verify that you are using the latest system BIOS.
Go into BIOS Setup, press [F9] and select 'Yes' to reset the default BIOS values
Change other Setup options as needed
Go to the Advanced menu and change the "Reset Configuration Data" entry to 'Yes'
Press [F10] and select 'Yes' to save these changes

If you are using Windows 95, you should also verify that you have installed the Intel® Chipset Software Installation Utility into your system.

Intel's PIIX Bus Master IDE driver also may be a factor in this issue. Contact your place of purchase to find out if this driver is installed on your system. To determine if your problem is related to the Intel PIIX Bus Master IDE driver, remove the driver. This removal capability is provided beginning with Intel® Bus Master IDE driver v3.02. Depending on your system settings and configuration, a re-install of your operating system may be required.

If you discover that the Intel BMIDE driver is the source of the hang or delay, there is a workaround for those using Windows 95 OEM Service Release 2.x. To confirm that your version of the operating system contains this workaround, check your version of Windows 95 using Control Panel -> System -> General. Versions 4.00.950 B or 4.00.950 C (but not 4.00.950 or 4.00.950 A) have their own built-in Bus Master IDE driver. To enable the built-in Windows 95 driver, perform the following steps:

Under Windows 95 System Properties/Device Manager, select the appropriate bus master capable IDE device (example: Disk drives, then GENERIC IDE DISK TYPE01)
Click on the "Settings" tab
Check the DMA box
Click on OK to save this setting, then OK to close the Device Manager

Using the BIOS CMOS Setup, manually configure any installed ATAPI IDE devices. Common ATAPI IDE devices are IDE CD-ROMs, LS-120 floppy drives,and IOmega* ZIP drives.