bagerlk,
You should not rely on the retail Intel chipset specifications when discussing Dell OEM (original equipment manufacturer) hardware. The Ivy Bridge CPU will not be validated on the XPS 8300 with the Dell OEM H67 chipset. These are the only CPUs validated by Dell on this model:
(Sandy Bridge)
706FY i7-2600 3.40GHz
N6TKH i5-2500 3.30GHz
MHF7R i5-2400 3.10GHz
F6KN0 i5-2320 3.00GHz
YXR1F i5-2310 2.90GHz
RGMN8 i5-2300 2.80GHz
950R3 i3-2130 3.40GHz
972H5 i3-2120 3.30GHz
5MH9T i3-2100 3.10GHz