Hi ParanormalBanana, thank you for joining our forum!
It’s an interesting question and interesting setup! But if you own a GTX card with HDMI 2.0 it must be a GTX 950, 960, 970 or 980 Maxwell card.
Since the converter you look for (HDMI 2.0 to DP 1.2) does not exist to our knowledge (we’re only aware of HDMI 1.4 to DP 1.2, enabling 4K 30Hz) the easiest solution would be to skip HDMI to DP part completely and connect your Philips monitor direct from a DP output on the card.
Note that this sort of conversion is highly sophisticated and most likely not achievable using DiY components and tools.