https://wccftech.com/gigabyte-z390-aorus-xtreme-waterforce-5g-bundle-intel-core-i9-9900k-5-ghz-1600-usd/

Gigabyte has made some impressive Z390 motherboards for Intel’s 9th Generation processor line and their flagship is undoubtedly the $900 US, Z390 AORUS Xtreme Waterforce. This motherboard carries it all from the AORUS Xtreme while supporting a custom made, all-in-one monoblock that extends through the board.

The Gigabyte Z390 AORUS Xtreme Waterforce is an enthusiast grade product and currently the most expensive Z390 motherboard in existence. The motherboard alone costs $900 US which is $350 US higher than the $549.99 US Z390 AORUS Xtreme that doesn’t feature the more lavish water cooling features.