I've just installed the Arc 770 LE, with latest drivers on Intel's website and found the card hitting 90C in the performance overlay, throttling back below 190W, whilst the fan speed would never exceed 1250rpm. Also having some hard resets, but not sure if this is related to the high temps as I've only installed the card today.
After following this useful youtube vid https://www.youtube.com/watch?v=biTl_M_REeI&t=120s, I'm now able to set a custom curve that keeps the card at about 75C with a fan speed of around 2200rpm without any throttling.
