GIGABYTE X399 Aorus Xtreme TR4 Motherboard Review GIGABYTE expands its Threadripper lineup with its X399 Aorus Xtreme motherboard. This motherboard has a solid, professional focused feature set, and has a lot to offer. We’ve seen some amazing socket TR4 motherboards thus far so the X399 Aorus Xtreme has a lot of competition. We did get to use the Xtreme for a lot of Threadripper testing. If you like our content, please support HardOCP on Patreon.