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lol thats nothing, my 8800gt hits 90C
Artic cooling accelero v1 rev2 is a very good cooler btw
cant see a format helping. This been happening since you got the card? What card did you have before? If it was an ati then could be old drivers still on your system, try using driver cleaner or driver sweeper to remove them.
No idea then sorry mate. BFG support is very good they will probably have a better idea than me. Dont tell them you tried underclocking the card cause that voids the warrenty. Give them an email and they will tell you how to fix it or arrange an rma