check the procssor type thru sisoft sandra or everest Home Edition.
I wud never advise u to buy Asrock mobo, specially when thry give special slots and all coz it all comes with lot of restrictions.
Visit the following links before taking any decision:
*www.asrock.com/product/product_P4Dual-915GL.htm
*www.asrock.com/support/AGI_EXpress/P4Dual-915GL_AGI_Support_List.htm
*www.asrock.com/support/AGI_EXpress/P4Dual-915GL_AGE_Support_List.htm