I have a computer system at home. My computer is quite old and let me tell you that I have amd athlon x2 processor. I am planning to assemble a new system for myself. Actually I have been hearing a lot about x3 processor and x4 processor (amd processor). I have heard that there is substantial difference in the performance of x3 to an x4. I donít know which cpu should I buy. I have heard that if I want to go for an extra core cpu then the difference is going to be only a 30 dollars. Is this true? Any suggestions would be greatly appreciated. Thank you in advance.