In the two horse race of performance video cards, things have been
pretty cyclical. One company would release a new whiz-bang card, then
the other company would release their response. This was followed by a
similar cycle of tweaked versions of the same cards. In the last two
release cycles those tweaks came in the form of dual GPU cards, which
sandwiched two cards into one package. The most recent cycle left off
with ATI releasing their dual GPU solution in the form of the Radeon HD
4870 X2, and NVIDIA responding with…nothing. NVIDIA finally turned their
nothing into something by releasing both a dual GPU solution and a
tweaked single GPU card, and they are bringing vendors like ZOTAC along
for the ride.

http://www.futurelooks.com/zotac-gef...o-card-review/