Flagship Rematch: Ryzen 7 5800X3D Vs. Core I9-12900K (DDR4 & DDR5) Gaming Benchmarks

Hardware Unboxed
Hardware UnboxedApr 8, 2026

Why It Matters

Understanding how memory type reshapes CPU performance helps gamers and builders choose the most cost‑effective platform, ensuring optimal FPS without unnecessary upgrades.

Key Takeaways

  • DDR5 memory gives Intel i9-12900K a 15‑20% edge.
  • Ryzen 7 5800X3D outperforms i9 on DDR4 setups.
  • 3D V-Cache boosts performance significantly in CPU‑bound titles.
  • DDR5 yields 17‑19% average FPS gain for i9 across games.
  • Ryzen 7 5800X3D remains competitive despite AM4 platform aging.

Summary

The video revisits the flagship gaming duel between AMD’s Ryzen 7 5800X3D and Intel’s Core i9‑12900K, testing each CPU with both DDR4‑3600 and high‑speed DDR5‑7200 memory. The creator updates earlier 2022 benchmarks, adding DDR4 data for the i9 to satisfy viewer demand and to gauge how memory bandwidth influences performance across a suite of modern titles. Key findings show DDR5 consistently lifts the i9’s frame rates by roughly 15‑20% in most games, while the 5800X3D gains a relative advantage on DDR4, often outpacing the i9 by 10‑35% depending on the title. AMD’s 3D V‑Cache shines in CPU‑bound and cache‑heavy games such as Arc Raiders and Boulders 3, delivering double‑digit gains over the Intel chip. Across a 14‑game average, the Ryzen leads by a modest 5% on DDR4 and ties or slightly edges the i9 on DDR5, confirming the CPUs remain neck‑and‑neck. Specific examples include Rainbow Six Siege, where the i9‑DDR5 hits 417 FPS (4% faster) but falls behind on DDR4, and Battlefield 6, where DDR5 gives the i9 a 3% lead overall but a 23% advantage in 1% lows. In titles like Arc Raiders and ACC, the 5800X3D’s V‑Cache delivers 22‑27% speedups, while DDR5 benefits the i9 modestly in less memory‑sensitive games such as Counter‑Strike 2. The results suggest gamers prioritizing performance should pair the i9 with DDR5, avoiding costly DDR4 configurations, whereas AMD users can extract strong performance from the aging AM4 platform without upgrading. The narrow margins reinforce that both CPUs remain viable flagship choices for high‑end gaming, with the 5800X3D offering a cost‑effective, power‑efficient path for DDR4 builds.

Original Description

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Buy relevant products from Amazon, Newegg and others below:
AMD Ryzen 9 9950X3D - https://geni.us/EUhdLvb
AMD Ryzen 9 9950X - https://geni.us/FeMg
AMD Ryzen 9 9900X3D - https://geni.us/JZRwiZI
AMD Ryzen 7 9800X3D - https://geni.us/a44Ec
AMD Ryzen 7 9700X - https://geni.us/M27J3o
AMD Ryzen 7 7700X - https://geni.us/fAfH
AMD Ryzen 5 9600X - https://geni.us/FyvXbeW
AMD Ryzen 5 8400F - https://geni.us/5eYN69
AMD Ryzen 5 7600X - https://geni.us/Hn7m9
AMD Ryzen 5 7500F - https://geni.us/ZexANL
Intel Core Ultra 9 285K - https://geni.us/b839wEU
Intel Core Ultra 7 265K - https://geni.us/FDXe
Intel Core Ultra 5 245K - https://geni.us/rbBBP
Intel Core i9-14900K - https://geni.us/f5Ge
Intel Core i9-12900K - https://geni.us/xEZFptS
Intel Core i7-14700K - https://geni.us/rlTARuL
Intel Core i7-12700K - https://geni.us/8KvA
Intel Core i5-14600K - https://geni.us/zYIOz95
Intel Core i5-12600K - https://geni.us/sDNeS
Intel Core i5-12400F - https://geni.us/bScTge
Intel Core i3-12100F - https://geni.us/VbMRmb1
Video Index:
00:00 - Welcome to Hardware Unboxed
01:01 - Ad Spot
02:02 - Comparing the 5800X3D & 12900K
03:18 - Test System Specs
03:27 - Rainbow Six Siege X
04:06 - Battlefield 6
04:50 - ARC Raiders
05:27 - Borderlands 4
05:51 - Marvel Rivals
06:24 - Baldur's Gate 3 (DX11)
07:18 - Cyberpunk 2077: Phantom Liberty
08:09 - Counter-Strike 2
08:32 - Space Marine 2
08:52 - Mafia: The Old Country
09:27 - Assetto Corsa Competizione
09:57 - Spider-Man 2
10:48 - Horizon Zero Dawn Remastered
11:14 - The Last of Us Part II Remastered
11:41 - 14 Game Average
12:12 - Conclusion
15:22 - Outro
Read the written review on TechSpot:
Disclaimer: Any pricing information shown or mentioned in this video was accurate at the time of video production, and may have since changed
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Intro/Outro Music by: David Vonk/DaJaVo - @dajavo_music

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