This is my retired X2 5600 F3 windsor same as the 6400BE but less speed.
http://www.amdgeeks.net/overclock/851
Yes defenitely change the fluid and reseat the block, i guess.
congrats on ur new chip.
BTW did u update to the newest bios? Sometimes that may be lead to better temps. Also see how far low you can low on the voltage with the stock speed, that will reduce heat.
