I bought this desktop direct from Dell and had to replace the motherboard 2 years ago. I sourced this mobo (http://www.impactcomputers.com/92jyy.html) and had it installed by a professional. My current CPU is Core i7 930@2.80GHz (8CPUs) according to Windows and I am trying to find out what I can safely upgrade to. Can anyone help me find out the specific name of the MOBO CPU socket is so I can choose a suitable replacement?