How is this setup?

[Jestarz]

I chosen this parts out, is this setup good and efficient for gaming?

Intel i5 3570k
Asrock Z77 Pro4-M
LT-GTX660/2GB/D5
Gskill VR 1600mhz 16gb
Lite On 24X
Western Digital 1TB Blue
Enermax 550w
Enermax ELC120

Thanks alot!

 

[clutchc]

All good except the PSU. I would recommend spending a bit more on a better quality PSU. What case is the system going into?