My MacBook Pro was suffering from the same Graphics problem as many others have experienced.
I followed the instructions to take out the faulty Logic Board. Then I installed the replacement from iFixIt, with a little bit of thermal paste. Got it all screwed back together and was done in 25 Minutes.
There were a few software issues with the new CPU but I was able to clear those up pretty quickly.
All in all it was easy, practical and saved my working CPU.
Repair your broken stuff. It is an educational process and makes your things more special.