The ASUS GTX760 DirectCU Mini OC is without a doubt the fastest graphics card in the world that's shorter than 18 cm. So if you're looking for a powerful graphics card for your compact Mini-ITX PC, this ASUS card is a good option. It's just as fast as the full-size GTX 760s, and only slightly more expensive. The only trade-off is the amount of noise the compact cooler produces.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips