Yes I've tried but it seems like my stream is not optimizedHave you tried our estimator? (click here). We made that tool in order to get the best estimate of settings based upon your system/connection info.
It may not give optimal settings, but just an estimate based upon the information you enter in to it. Your computer seems fine, it's probably more about how much bandwidth you have. I don't think there's much you can do with only 1mb upload. You really need more upload for a high quality stream.