The Corsair Ram was added after the Core 2 Dou E8400 was in it and Windows 7 x64 was Updated and Stable. I put in the Corsair Ram and it ran well so changed nothing in the settings of the Bios. Then Switched the CPUs back to the Core 2 Extreme. On Boots it behaved as trying to load the Retail DVD the first time after the Animation
Both processors are fully compatible with the motherboard in mention and there should not be any problem when changing the CPU in the motherboard.
Based on your description, it seems the QX9650 processor could be failing and causing this BSOD but there is nothing to configure in the system when switching processors.