Matrox Helios Series Installation And Hardware Reference page 43

Simultaneous image capture from different boards 43
Helios XCL, XA, or XD board, you should not have problems with dropped
frames. The list of platforms known to be compatible with Matrox Helios are
available on the Matrox web site, under the board's compatibility list.
To measure the available bandwidth of the PCIe/PCI/PCI-X segment used by
your Matrox Helios board, you can use the HeliosBench tool integrated in the
MILConfig utility. As a reference point, capturing from a 1K x 1K, 8-bit, 60
frames/sec video source will require a minimum bandwidth of 63 Mbytes/sec, plus
an additional bandwidth margin of approximately 20%, for a bandwidth of
75 Mbytes/sec.