No one can say with certainty how well your computer will perform in SSE.
It is below minimum requirements as presently stated by VSTEP.
However, your specifications, even when given in more detail by posting your DxDiag (as you should do if you want anything more than a guess), do not tell the whole story. What else is on your computer that may be using the resources can make a big difference, as can the graphics settings that you find acceptable.
It would be irresponsible for anyone to say definitely that that it will or will not provide what you would consider acceptable performance if that advice were to lead you to make a bad decision about spending money on either a new computer or on SSE.
