I'm going to answer my own question and ask another.
After more searching and reading i have discovered the source of my problem. The SR1680MV server boards i have are the Tylersburg B3 stepping.
No support for 130W 5600 cpu's. I was trying to be sneaky with a custom thermal solution.
So my question is - In the supported cpu list for this revision board they are the 95W 5600 cpu's. X5670 being the top one listed.
Is the X5675 also supported as this is a 95W cpu as well?
Also in the "westmere refresh" SR1680MVR. Does this contain the C2 stepping chipset? Can i install the 130W cpu's?
Any help or pointers would be greatly appreciated.
I'm tryingto get us much density into a small place as possible.