a little update...
had my first free time to bench this afternoon in awhile and was able to put in a couple hours on the single stage with my w3520
coldest idle temps were -51c
under load with 1.475 vcore, 1.475 vtt temps did not go below -49c in 06 CPU tests and Spi 32m
that's all I tested today, but I am very impressed so far with the ability to hold load, but real real test will be with 975 and 1.59v+