I heard some 2009 MPs (4,1) were sold with single socket boards but some were also sole with dual socket boards but with only one CPU. Mine only has one CPU, but it's a single quad core. My old 2006 MP1,1 had 2 X dual core 2.66's How can I tell if mine has a dual socket board? (I want to upgrade to dual 6 core procs and the upgrade person wants to know if it's a single proc board or not. Costs more for single proc board upgrade to dual) Thanks.