chenw :
The only way to do it is via DP to HDMI active adapters. You can't add HDMI ports to the card directly, and I don't think HDMI supports daisy chaining.
dexxterlab97 :
Unfortunately either you have to upgrade your GPU, add new GPU. You can not add extra ports unless you use an adapter that split HDMI ports (Which is not recommended)
Well, my GPU also has like 4 display ports, so could I use just like a DisplayPort to HDMI convertor?