I have a PowerColor PCS+ AX7870 2GBD5-2DHPPV3E Radeon HD 7870 MYST. Edition (Tahiti LE) 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card (UEFI Ready) and i am trying to bridge and get another graphics card on my asus formula-z and i am trying to figure out what other graphics cards its compatible with.