So I just got my ASRock P67 Extreme6 motherboard and my second GTX 460, but when I install both in the motherboard, only one of them shows up in Device Manager.
Specs:
Cooler Master 800W PSU
PNY XLR8 GTX460 (http://www.newegg.com/Product/Product.aspx?Item=N82E16814133326)
Palit GTX460...