that physx test will make or break a run. Good job Q!!!! This run has nothing to do with the uber cold weather we have been having in the north east does it??
As far as precision goes, GPU's 1 & 3 will not show lower then 8°C. GPU's 2 & 4 will go considerably lower (-teens). Yes I use Prestone windsheild washer fluid, Antifreeze slows down its flow considerably under the temps.
Sorry i wasn't around last night I was feeling a little under the weather and passed out early.