Good build?

I live in Argentina, it cost around 5000 pesos here (decent)

AMD FX-6300 3.5GHz 6-Core Processor

Asus M5A99X EVO R2.0 ATX AM3+ Motherboard

HIS Radeon HD 7950 3GB Video Card

I dont know about RAM, can someone remomend me one?

Go read the guidelines in the sticky in the buildapc forum thoroughly, then come back and edit your post accordingly.

I apologize, is it good now?

Use pcpartspicker.

Here

http://pcpartpicker.com/p/1sGMm

I left you a great deal of headroom in the budget, in case parts are more expensive where you live. If you are still under budget when price differences are accounted for, or some of these parts are not available where you live, I can re-configure the build.

The RAM and the case are not available here.

The price buying the CPU, MOBO, GPU  and poweer supply (dont need storage and I dont really care about good fans) is $6000.