I purchased lenovo z50 70 befor 9months it perfomence is good and its battery backup is just awesome. Its a very nice product from lenovo.
It comes with Intel Core i7 ( 4th Gen) 4510U / 2 GHz
Max Turbo Speed 3.1 GHz Dual-Core 8gb RAM.
Cache 4 MB
64-bit Computing , Features Hyper-Threading Technology, Intel Turbo Boost Technology 2.0, integrated memory controller
LCD Backlight Technology LED backlight
Resolution 1920 x 1080 ( Full HD)
HARD DRIVE Type HDD with Capacity 500 GB
Graphics Processor Intel HD Graphics 4400