sorry to ask but what is TDP ? and how to figure that out ? and phenom 2 is for am3 socket if i am correct ? and when i look at asus cpu support on web it gives a notice like "beta version" and stuff like that is it ok ?
TDP is 'Thermal Design Power'. The TDP on your MoBo might be 125w. A 125w TDP Mobo can handle any CPU that runs with a 125w TDP or less. Every Phenom II CPU exect one or two is a 125w TDP. I would play it safe and grab a 95w TDP CPU. Phenom II is AM3, but will work with only AM2+ and AM3 CPU sockets. AMD did an upgrade path which was AM2+. AM2+ (which you have) will support AM2, AM2+, and AM3 CPUs. You could put in a Phenom II, but I would do this one: http://www.newegg.com/Product/Product.aspx?Item=N82E16819103921&cm_re=AMD_Phenom_II_x4-_-19-103-921-_-Product
3.2Ghz and a 95w CPU TDP. It would be a great choice for you. It will be fast, and have 4 cores, just no unlocked multiplier sadly.