QuoteThe test methodology is undeniably AMD-favoured here, as the i9-12900K can significantly benefit from faster DDR5 RAM.

Not true. Both were tested with identical RAM. It's a fair comparison and doesn't favor AMD in any way. The 12900K supports up to DDR5-4800. Which practically offers the same performance as DDR4-3200 in games. 12900K can gain some fps with good >=DDR5-6000. But that is not officially supported. Testing with it would clearly favor Intel. And such memory modules are still very expensive. Which makes 12900K's gaming value even worse compared to 5800X3D.

QuoteThe test methodology is undeniably AMD-favoured here, as the i9-12900K can significantly benefit from faster DDR5 RAM.

anandtech.com/show/17047/the-intel-12th-gen-core-i912900k-review-hybrid-performance-brings-hybrid-complexity/13

Just glancing at AnandTech's 12900K DDR4 vs. DDR5 tests, and the differences are usually small. Bigger for productivity benchmarks. 12900K(S) just isn't going to overcome the 5800X3D in some select titles that love the extra cache.

The 5800X3D is an interesting little experiment, hopefully leading to 3D V-Cache on the Zen 4 lineup at launch, and without the clock speed limitations.