We use Nvidia PCAT to measure power draw of the graphics card only, with readings from both the PCIe slot and the PCIe power cables combined into a single figure. We use Resident Evil Village (4K) for this testing.
Despite a 320W TGP, actual power draw is much lower, averaging just over 273W, which is almost identical to the Gigabyte Gaming OC. We know the 4070 Ti more often voltage limited than it is power limited, so even with a higher power limit on the iChill X3, it doesn't really matter that much.