jdq1412 :
Top card is water cooled, and the fan that has at the end i have set always around 30% rpm, and i think the fan is actually blowing air inward hitting the vrm, so the top card isnt really heating the bottom one.
no, but the bottom card is heating the top one....(yes I know it's not running hot, but I would never needlessly let something run hotter than it needs to).
Do you have anymore pci 3x16 slots? Do you have any ability to get more airflow to the hot card? I've got 2 aircooled cards, I spent a whole afternoon one day a year ago messing with cables and moving the cards around to find the best cooling solution. Not to mention swapping out some case fans. Keep in mind that 74 isn't going to cause throttling(when I tinkered with my setup, my goal was to keep both cards below 70, I succeeded).