It has the full complement of 1536 CUDA cores with a 40 MHz (4%) faster base clock and a 27 MHz (2.6%) faster boost clock. The only significant feature that the GeForce GTX 770 brings to the table is its 7 Gbps GDDR5 graphics memory - the fastest memory clock speed to date! This allows it to deliver a peak memory bandwidth of just over 224 GB/s, or 16.6% more than that of the GeForce GTX 680! Like the GeForce GTX TITAN and the *GeForce GTX 780 , it will also support the newer GPU Boost 2.0, which gives you more advanced controls for overclocking, fan control, and hardware monitoring."
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