I don't have the Aorus but I have 6 of the Gaming OC variant. All my memory runs into the 100-110C range if I don't turn up the fan speed. I pulled one apart to make sure it was pasted correctly and make sure the thermal pads were making contact properly. They were, so it's just a power issue with the 5700 XT. If you can get mem voltage down that should help, but try increasing fans to at least 45%.