ENVY 15t-1100 CTO (NX346AV) Dual core CPU upgrade?

Hello Experts,
I have the Laptop noted above (15t-1100 CTO) and I would like to replace the quad core i7-i820QM CPU (its a Clarksfield variant of Nehalem - Socket G1) with a faster (more power efficient) Dual Core CPU.  I purchased a i7 620M (more power efficient dual core also on Socket G1) and when installed in the laptop, it POSTS, but Windows will always crash 1/2 way through the boot, reguardless if I'm on the original install of the Windows 7 OS, or trying to boot a Windows 7/8 Install CD (via USB).  I feel that the board lacks support for this CPU (any of the dual core CPUs really), but I cannot find confirmation anywhere.  Also note, I had to remove 2 of the 4 ram sticks to even get this far (leaving a single ram stick on each channel.. I'm assuming partly due to the dual core supporting only 2 memory chanels.
Please advise

HI kylematinfox:
I hope you had a super weekend!
I understand you are having some difficulties after doing an upgrade. I am sending you the link to the user guide for your computer  click here. I am also sending you a link to Replacing the Motherboard click here. If you replaced the motherboard have you tried doing a bios update?If you require further assistance would you please provide the details of any changes you have made.
Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
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    cgatno wrote:
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