Any suggestion or experience, I am currently running a "home Server" with windows 7, I am just streaming movies (HD 720 and 1080) across the house (8 x 2TB with a Supermicro SAS2LP-MV8 controller).
I am thinking of some improvement.
I have an AMD Sempron 145 with an old MSI 790gx mobo (no sata3, onboard video card).
I am tempting by a new i3 3225 with an ASRock Z77 Pro3 1155 for around 180$. And I just bought a new ssd.
is it worth the investment? Any other suggestion? Would it improve my streaming?
Not sure what you mean by "improve", are you having issues now? If you are, then yes it will improve things. It's by far a much faster CPU, but if you have no issues with streaming now, you won't have any issues after the upgrade, so what's the point?