Can adding a GPU improve performance of a slow PC?

So,I have an old Celeron J1800 pc which is slow and lags while web browsing or YouTube...Can adding a gpu resolve the lagging issue as i use it for browsing and word processing? I m thinking of gt 710. And will pcie x1 slot affect gpu performance as motherboard doesn t have a pcie x16 slot. Motherboard is... show more So,I have an old Celeron J1800 pc which is slow and lags while web browsing or YouTube...Can adding a gpu resolve the lagging issue as i use it for browsing and word processing?
I m thinking of gt 710.
And will pcie x1 slot affect gpu performance as motherboard doesn t have a pcie x16 slot.

Motherboard is Ga-J1800M-D2P-IN.
4gb RAM

Please suggest!
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