Upgrade route - If possible

[Orca44]

Intel Core i5 750 @ 2.67GHz Lynnfield 45nm Technology
RAM 8,00GB Dual-Channel DDR3 @ 663MHz (9-9-9-24)
Motherboard Intel Corporation DP55WG (LGA 1156)
Graphics
L204WT (1680x1050@60Hz)
1024MB ATI AMD Radeon HD 5700 Series (Sapphire/PCPartner)

What you see above is my current specs of my pc. Used mainly for gaming.

Is there any upgrade that I can do that will make a difference, or is a new pc in order?

Thanks

 

[user 997]

 

[Nikkel]

 

[Orca44]