Hello,
As we can see from the specifications on the Intel website, i9-13900K and i9-12900K processors only support dual-channel mode:
https://ark.intel.com/content/www/us/en/ark/products/230496/intel-core-i913900k-processor-36m-cache-up-to-5-80-ghz.html
https://ark.intel.com/content/www/us/en/ark/products/134599/intel-core-i912900k-processor-30m-cache-up-to-5-20-ghz.html
But Aida reports about the Quad-channel mode: