When NVIDIA launched the GeForce GTX 550 Ti, it was significantly less powerful than the GeForce GTX 560 Ti. So it was obvious that NVIDIA would eventually slot a new graphics card in between the GeForce GTX 560 Ti and the GeForce GTX 550 Ti. That day has arrived, and that graphics card is unsurprisingly named the NVIDIA GeForce GTX 560."
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips