tottenhamjm :
Sergeant_Sneaky :
It depends on what card you have and what connectors is has.
I linked the GPU in the original post. (It was linked to "this"). Here's the direct link to my card: http://www.newegg.com/Product/Product.aspx?Item=N82E16814127741
Sorry I didn't see that, you can use both the DVI slots (using a dual link DVI cable) and you can use the display port too.
Out of interest, what are you planning on using the three 144hz monitors for?