214 hours of rendering ?

[psipsokoino]

Hello
I have to core processor with 4 gb of rams.
I meet problem with rendering. It shows that it takes 214 hours, which is 8 days. Any suggestion how to it faster ?

--- Rendering "tunnel.jpg" ---
Size: 3200x2355
Quality: 2000
Oversample: 2, Filter: 1
Buffer depth: 32-bit floating-point
16:22:50 : Allocating 463.70 Mb of memory
16:22:50 : Rendering...

[PAEz]

Have you turned multithreading on in the general tab of settings?..it doesnt get turned on automatically....still seems a little long