For any gamer absolutely sufficient!

Although there is already the newer GTX 700 - series exist, I decided due to the price / performance ratio for this graphics card. And I must say, it is sufficient to me for a long time. It is very fast (clear is always better), only slightly audible under load and does not have high power consumption.
My Computer:
AMD Phenom 9850 2.5GHz (overclocked to 2.6 GHz)
4 GB RAM
128GB SSD to SATA 1 (unfortunately, since the motherboard is already about 5 years old)
MSI GTX 660 (previously GTX 550 Ti) to PCI Express v1

Have long wondered if there because the GTX 660 PCI Express 3 supports or would like to use a large performance drop, but it also works to v1 wonderful, about twice as fast as the GTX 550 Ti (according to MSI combustor benchmark tests). Means something like NFS Rivals Run with almost maximum details in filling HD liquid, and so the game is very demanding (Frostbite 3 engine as BF4). For other games, unfortunately I have not had time, but it is certainly a similar nice and fast gameplay.