Why does my pc bottleneck?

mjwhelan

Distinguished
Oct 26, 2011
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Hello,
I built a new PC in december 2011, it was on a budget but it still should bottle neck so easily.

Its components are:
i3 2100
XFX 6770
Gskill 8gb 1333
OCZ 500W
Foxconn H67 MB
320gb 160gb HDD

Windows 7 pro

it bottlenecks when Im using google crome itunes youtube what ever else im doing.

How can i improve the performance e.g. do i need to upgrade my cpu? or graphics card?

Thanks