CPU support is defined by the BIOS on the motherboard. If the bios is not current, you may not properly recognize some of the 32 nm cpu's that would otherwise be supported. For that reason, you might want to test with the i5-750 which is the cheapest of the originally announced 1156 supported processors. Another consideration might be if you will test H55 and H57 motherboards. Such motherboards will need a 32nm clarkdale cpu like the G6950 in order to test the integrated graphics.