Will National Instruments PCI Hardware Work in 64-bit PCI Slots?

Updated Sep 11, 2018

Reported In


  • PCI-8212
  • PCI-5102
  • PCI-4472

Issue Details

Some motherboards have 64-bit PCI slots, but National Instruments PCI boards are made for 32-bit slots. Are these boards compatible with 64-bit slots?


The PCI bus has different permutations. It can have either 32-bit or 64-bit slots. It can run at 33 MHz or 66 MHz. It can be powered by 3.3 V or 5 V.

Historically, most NI PCI hardware has been developed in the 32-bit, 33 MHz, 5 V variety. This means most will not be compatible with slots that are 64-bit, 66 MHz, or 3.3 V. Some notable exceptions include the following:
  1. Some PCI-GPIB boards are keyed for both 3.3 V and 5 V. Examples include the PCI-8212 (combo GPIB and Ethernet), the PCI-GPIB/LP (Low Profile), and revision K or later of the PCI-GPIB and PCI-GPIB+. All PCI-GPIB boards are the 32-bit, 33 MHz variety but can work on properly keyed 64-bit and/or 66 MHz slots at 32-bit, 33 MHz speeds.
  2. Some high speed digitizers. For example, the PCI-5102 works with 32 bit, 33 MHz, 3.3 V or 5 V.
  3. Some dynamic signal analyzers. For example, the PCI-4472 works with 32 bit, 33 MHz, 3.3 V or 5 V.

Additional Information

The PCI bus will run only as fast as the slowest device, so a 66 MHz-capable bus will only run up to 33 MHz if a 33 MHz board is installed.


Not Helpful