The Dell monitor you refer to only has HDMI 2.0 input according to product information on Amazon. You should be able to convert your motherboard's DisplayPort 1.2 to HDMI 2.0 with the Club3D adapter I linked above, or you could choose a different monitor that supports a DisplayPort input.
The Intel HD GPU serves two purposes for
Blue Iris:
- The Quick Sync feature enables Blue Iris to use hardware accelerated h.264 decoding (not enabled by default) to save a lot of CPU time.
- It feeds the onboard video outputs.
Many motherboards will disable the Intel graphics when a 3rd party graphics card is detected, but sometimes you can re-enable the intel graphics in the BIOS settings. The relevant BIOS option may refer to the Intel graphics as "iGPU". Further, you may need to have a monitor attached to an onboard video output in order to use hardware accelerated decoding.
I you don't really know what you are doing you have a good chance of configuring it wrong and losing the benefits of Quick Sync video acceleration, all because you plugged in a 3rd party graphics card. The only benefits of a 3rd party graphics card are:
- They may provide video outputs not available on your motherboard.
- Nvidia graphics cards have been known to reduce the amount of CPU time required to draw the Blue Iris GUI on a large monitor. It is unclear to me if AMD cards can deliver the same benefit to CPU usage. This benefit alone is not usually worth the added cost, complexity, and energy usage.