Intel(R) Corporation
Intel® Desktop Board NX440LX

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Software and drivers
Bios and drivers

Product Documentation
icon Technical Product Specification
icon Specification Update

Compatibility
Supported processors

The motherboard only supports Pentium® II processors that run internally at 233, 266, 300 and 333 MHz and have a 512KB L2 cache supporting ECC or non-ECC operation.

While the Intel® Celeron® processor uses the same P6 microarchitecture as the Pentium II processor, there are some differences. The BIOS does not currently contain support for the Celeron processor. While the Intel® Celeron processor may appear to work in a Intel® NX440LX Motherboard, the reliability of operation is not known.

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

System memory

Contents

System Memory Combinations
The motherboard has three, dual inline memory module (DIMM) sockets. Minimum memory size is 16 MB; maximum memory size is 384MB. The BIOS automatically detects memory type, size and speed.

The motherboard supports the following memory features:

  • 168-pin DIMMs with gold-plated contacts
  • 66 MHz unbuffered SDRAM only
  • Non-ECC (64-bit) and ECC (72-bit) memory
  • 3.3 V memory only
  • Single- or double-sided DIMMs in the following sizes:


DIMM Size Non-ECC Configuration ECC Configuration
16 MB 2M x 64 2M x 72
32 MB 4M x 64 4M x 72
64 MB 8M x 64 8M x 72
128 MB 16M x 64 416M x 72

Memory can be installed in one, two or three sockets. Memory size can vary between sockets.

DIMM Vendors - Web Sites
The list below contains vendors that have tested their memory for Intel® NX440LX Motherboards and that have their products listed on their own website. Please visit their sites to obtain information on their products.

DIMM Vendors - SDRAM Non-ECC DIMMs
Synchronous DRAM (SDRAM) improves memory performance through memory access that 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.

Note: To function properly, SDRAM DIMMs must meet the Intel® 4-clock, 66 MHz, unbuffered SDRAM specification for either 64-bit or 72-bit SDRAM. See the Technical Product Specification for more information.

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 (8 MB), Non-parity
None at this time.    
2M x 64 (16 MB), Non-parity
None at this time.    
4M x 64 (32 MB), Non-parity
Micron FULL MT16LSDT464AG-66CL2
NEC FULL MC-454AD644F-A67
8M x 64 (64 MB), Non-parity
Samsung FULL KMM366823ATL-G2
Samsung FULL KMM366S823ATL-G0
16M x 64 (128 MB), Non-parity
None at this time.    


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 non-ECC memory is installed, the Setup option for ECC mode does not appear.

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 Program
  ECC Disabled ECC Enabled
Non-ECC DIMM No error detection N/A
ECC DIMM No error detection Single-bit error correction,
multiple-bit detection


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
2M x 72 (16 MB), ECC
None at this time.    
4M x 72 (32 MB), ECC
NEC FULL MC454AC724F-A10
8M x 72 (64 MB), ECC
None at this time.    
16M x 72 (128 MB), ECC
NEC FULL MC4516CC724F-A10



Installation and use
Last known issues

Latest BIOS and drivers
Refer to the current drivers and BIOS version for the Intel® NX440LX motherboard.

Processors Supported
The Intel® NX440LX Motherboard supports Pentium® II processors at 233, 266, 300 or 333 MHz. Also see the additional information on processors supported and special information for using 333 MHz Pentium II processors.

Configuration Jumper and Options
A single jumper enables the Intel® NX440LX Motherboard's configuration mode. All options are then available through the BIOS Setup screens, which are documented in the Technical Product Specification.

Synchronous DRAM (SDRAM) DIMMs
Only Synchronous DRAM (SDRAM) DIMMs are supported on the Intel® NX440LX Motherboard. The memory should meet version 1.0 of the 4-clock, 3.3 volt SDRAM specification and must have the Serial Presence Detect (SPD) EPROM programmed.

Will my ATA-66 Hard Drive Work on the Intel NX440LX Motherboard?
The IDE controller integrated into the Intel® NX440LX 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 NX440LX 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 NX440LX Motherboard. Please refer to the Technical Product Specification and the Motherboard Specification Update for more complete details on the various transfer modes.



CD-ROM or Second IDE Hard Drive Issues

There are two known issues involving CD-ROM or secondary hard drives:

  • The retail version of Microsoft Windows* 95 may not recognize the Intel® 82371AB PIIX4 IDE controller used on Intel® motherboards causing the secondary IDE channel to be disabled. This can result in IDE devices (such as CD-ROM drives) not being detected or disappearing after the system is rebooted. A utility is available to update the MSHDC.INF file and resolve the issue.
  • Windows* 95 also may fail to recognize a CD-ROM drive that does not comply with the ATAPI specification.


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