My computer should be good enough to run PC games; however it experiences sudden spike in lag frequently. Graphic driver and Ram should be enough to support my games as it is smooth but randomly and frequently, it'll experience a lag spike. Also, even when I'm not playing games, if I run several multimedia at once (video player + YouTube), the same will happen. Could you tell me what may be wrong with my computer and if I need an upgrade?
Processor: Intel(R) Core(TM)2 Quad CPU Q6700 @ 2.66GHz 2.67GHz
Graphics Card: NVIDIA GeForce GTX 650
System Manufacturer: MSI
System Mode: MS-7592
Number of Screens: 2 - 3