Start and then search "msinfo32 " no quotes. The first thing that comes up will be a hardware summary. On the right side about 1/3rd of the way down, "BIOS Version/Date". For example, my motherboard: Phoenix Technologies, LTD, P10, 12/30/2009. The version is P10 with the release date.
Also, you can see where your CPU shapes up against other CPUs here on Tom's CPU Hierarchy.http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-5.html
My personally opinion, if you buy a new CPU and GPU, you might as well start a new budget build.