Now I am using sony laptop. Really all sony produced are good working and performance also good.
Processor Core i7(3rd Gen)
Clock Speed 2.9 GHz with Turbo Boost Upto 3.6 GHz
Dedicated Graphics Memory Capacity 1 GB
Graphic Processor AMD Radeon HD 7550M
Dedicated Graphics Memory Type DDR3
Expandable Memory Upto 8 GB
System Memory 4 GB DDR3
VAIO is good & working fine with faster processing. Though sometimes, working on Windows 8 is tough. The only discontent is that battery stops recharging once it achieves 80%.