After the two DVI ports and Display port on my graphics card had each been taken by a monitor, my newly added VRinsight GPS-5 was naturally connected to the remaining HDMI port on my GTX 780 via a VGA-HDMI converter in the first place.
Surprisingly, while my FSX system continues to run smoothly, my P3Dv2 responds with serious stutters as framerates dropped momentarily under the same setup with the external GPS attached. Feedbacks to such framerate dropping issues in the last post reveal that the phenomenon is common regardless of platform and monitor setup.
Based on the presumption that an additional graphics card should help relieve the loading from the existing graphics card that already processes three monitors, another GTX 780 card was therefore plugged into the system and connected to the GPS-5.
Bingo! With the second graphics card in place, P3Dv2 now runs as smooth as it used to be. No anomalies were found after hours of running. Simulator performance was also not affected by the extra card — neither improved nor degraded.
Indeed, using a GTX 780 for such a scenario is an overkill. I just happened to have an extra graphics card on hand that was left over from my last mistaken SLI setup. Of course the cards now runs individually.
I believe similar results could be achieved by replacing the GTX 780 with a lower end graphics card because the GPS-5 requires only 1024 x 768 VGA resolution that needs limited video and computer resources.
Nevertheless, it’s still not a real solution to systems that run on a single card.