Bought new X299 board and 7800x when I boot into Bios it's already at 98 celcius

[KarathKasun]

Just now, TahoeDust said:

Are you sure?  I have never seen an H100i that did not have a Sata connector for power...

 

Look through this...  http://www.corsair.com/en-eu/blog/2013/february/how-to-install-the-hydro-series-h100i-cpu-cooler

I have an older one that only has 3pin fan style connectors.

[just_dave]

Seriousl check manual/board header callouts

[porina]

I had the same problem with a H110i GTX on my Ryzen build. Most likely the pump is not working for some reason. In my case there was much speculation but essentially it was powered but pump was stuck. I tried all sorts of things to free it, like rotating the case around to shift liquid around, and tapping the CPU block/pump. Eventually it freed itself, made a loud click and started pumping again. As others have said, ensure the pump connector is getting full 12V.