It can take a while to get a reply to this request as there are several guides available which already help you find the answer, plus our estimator. In general we get about 100 of these posts everyday which have been answered a hundred times before and could be remedied by quick search.
Now to your question, your CPU will limit you quite a bit, but you can try to stream with the following settings:
Base Resolution: 1920 x 1080
Downscale: 1.50 (1280x720)
FPS: 30
Bitrate: 2000 (assuming you have more than 2,5mbit upload available)
Use CBR: on
Settings I did not list need no change, apart of your streaming service of course. But you probably read our overview and quickstart guide and know how to do that. After testing, if you encountered problems, be sure to post a log from OBS.