NVIDIA had already given the board partners and cooler manufacturers a thermal map long before the launch of the AD102, which I would like to show you as a small excerpt. The thermal map for the 600 Watt load and the critical areas on the board I have already discussed today’s content together with some board partners and cooler manufacturers and I am also very sure that the whole thing will later find its way into current production just like my pad mod of the GeForce RTX 3080 FE back then. Why engineering has so nonchalantly turned a blind eye here is hard to understand. And no, it’s not the “evil” connector per se, but rather the board layout of the graphics card, NVIDIA’s control mania with the shunts and the insufficient or missing cooling of a very special area. Today’s tests and also my “tinkering instructions” show that it does not always have to be the user’s fault if the 12VHPWR connector heats up more clearly than expected. This still required a special SSD conversion in the lab. The room and water are kept at 20 ☌ and I also make the radiometric videos at 30 FPS this time, which requires quite a lot of storage space since the originals have to be stored uncompressed. Of course, I will then go into the topic of air cooling at the relevant points, but the measurements are simply more accurate with a constant temperature for the remaining components. In order to be able to work out visible differences as well as possible, I did today’s test again with a GeForce RTX 4090 Founders Edition and a GPU waterblock (Watercool Heatkiller V Pro) at 600 watts load. Important preliminary remark about the project and the measurements Today, I’ll show how using just two pads can lower the connector temperatures in the 12VHPWR by up to 15 (!) Kelvin and also explain where the high temperatures primarily originate and why both the Founders Edition air cooler and all GPU waterblocks tested so far have some sort of design flaw. In general, today’s review does affect all graphics cards that use external power connections, but the rather small 12VHPWR adapter and the ability to blow through a whopping 600 watts (and more) on some GeForce RTX 4090s obviously tightens things up a bit.
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