Try deactivating and reactivating Secure Boot. There are a few videos about this on YT.
Also check whether the EXPO profile is activated correctly
In the BIOS under:
Tweaker > Advanced Memory Settings > EXPO Profile1
And otherwise this is more of a problem that can be easily solved with Google. Of course only if the RAMs work with the timings.
The Gigabyte X870E AORUS ELITE WIFI7 motherboard, with its ATX form factor measuring 305mm x 244mm, is compatible with the Corsair 5000D Airflow case, which supports ATX motherboards. This motherboard supports AMD AM5 socket processors, DDR5 memory, and includes features like Wi-Fi 7 and multiple M.2 slots, fitting well within the Corsair 5000D Airflow's spacious interior designed for high-performance builds.
Kingston Fury Beast 6000 MHz RAM is compatible with motherboards equipped with the AM5 socket and AMD X870E chipset. This DDR5 memory works well with AM5 platforms, such as this one, without the need for complex tuning, and is designed to support AMD EXPO profiles, ensuring good compatibility and performance with the 7th to 9th generation Ryzen processors supported by the motherboard.
Yes, the motherboard is compatible with the AMD Ryzen 7 7800X3D processor, as it supports the Ryzen 7000 series processors on socket AM5.
You can therefore use it without any problem with this model of processor.
The motherboard supports PCIe 5.0 for graphics and NVMe, but it also includes slots that run at PCIe 4.0 and PCIe 3.0. Specifically, the PCIEX16 slot can operate at PCIe 5.0 with certain processors, while other slots run at PCIe 4.0 or PCIe 3.0.