im planning on upgrading from a single Gigabyte GTX 780 (type here): http://www.gigabyte.com/products/product-page.aspx?pid=4673#ov
and buy a second GTX 780.
should I buy a single GTX 980 or a second GTX 780?
and buy a second GTX 780.
should I buy a single GTX 980 or a second GTX 780?