Dear Customer,
The Bitspower Orion 4090 MSI water block is for the front GPU, not for the back side of the card. The hotspot temp is around 80c and 95c, that's normal. If you use air cooling of the card, the hotspot temp is about 110c. And mostly, the hot spot temp won't affect the performance function of your card. If you still want to make the hotspot temp lower, you can add a fan or backside water block on the back plate of our water block.