what do you mean by good?
Are you asking will the i5 be able to keep up with the 590? If so it will able to handle the gtx 590 just fine.
to help get you what you need I have a couple of questions (assuming you want to purchase a gpu):
what is your monitor resolution?
what is your current power supply?
what games do you currently or want to play?
what is you budget?
I can't recommend a gtx 590 to anyone due to the crazy amount of money it cost. It is also overkill for certain resolutions. It is also outperformed, as yargnit stated, by gtx 570 sli.
there are a several options that typically are better compared to the single gtx 590.