You have a lot of problems there.
1- The CPU Bus Frequency must be 200MHz not 400MHz
2- Your CPU ratio must be x18 for get the 3.6GHz, not x8.5
3- When you change the CPU Bus Frequency, you change the NB frequency, HT frequency and RAM frequency, so, that's the reason to use the CPU multiplier in a BE CPU like yours.
4- 3600MHz on NB with stock voltage will NEVER work, even in Thuban core is pretty difficult to get, so, change it to "Auto" while you get the 3.6GHz on CPU, after that you can play with the NB frequency.
Let me know the results.