6 Quad HDMI Recorder on CentOS

I am currently using 6 Quad HDMI cards on CentOS to capture 24 HDMI inputs. Most of the time, it works well, but sometimes I experience image freezes or black outputs. Whenever this happens, all four inputs from the same card are affected. To resolve the issue, I have to reboot the entire system. I am wondering if there are any logs or troubleshooting methods available to address this problem?

Well what kind of CPU are you using. Could be your out of PCIe Lanes. Just let us know what your setup is like and then I can give further insight.