The latest computers are likely to have a mixture of PCI and PCI Express slots, or maybe only PCI Express, which means you may not be able to install the PCI cards that you used in your previous system.
ADLINK have produced a range of PCI Express data acquisition cards that are direct replacements for the high performance DAQ-2000 series. Install a DAQe-2206 PCI Express data acquisition card, instead of a DAQ-2206 (PCI version) and no changes to software are needed.