For our temperature testing, we measure the peak GPU core temperature under load. A reading under load comes from running Cyberpunk 2077 for 30 minutes.
Intel's Arc Limited Edition cooler does a proficient job of keeping both GPUs cool, too. Do note the chart above shows both GPU and VRAM temperatures, but both cards were able to keep the GPU temperatures at or around 70C under load. The VRAM on the A750 did run a bit hotter than that of the A770, but neither result is particularly worrisome.