AMD Ryzen 7 5800X3D 対 Intel Core i7-14700K — 2026年のDDR4覇権を巡る新たな戦い

We tested both CPUs across gaming, rendering, encoding, efficiency, and pricing to see if the Ryzen 7 5800X3D can keep up with the newer Core i7-14700K with DDR4. We tested both CPUs across gaming, rendering, encoding, efficiency, and pricing to see if the Ryzen 7 5800X3D can keep up with the newer Core i7-14700K with DDR4. <p>Hassam is a lifelong PC gamer and tech enthusiast with over five years of experience in PC hardware journalism. His passion began in childhood when he rescued a discarded Pentium 4 processor, straightening its pins with a kitchen knife to revive a Dell Dimension 2400 at the age of seven. Since then, he has followed the advancements in technology, witnessing the evolution of hardware from the era of AMD's Opteron architecture to Intel's Smithfield (Pentium D), and the rise of Voodoo GPUs alongside Nvidia's FX GPUs taking the market by storm to the latest innovations today. As a seasoned writer, Hassam loves to get into the nitty-gritty details of hardware, providing insights on everything from CPUs, Motherboards and RAM to GPUs. When he’s not writing, you’ll find him building custom water-cooled PCs for himself and his friends, attending drag racing events, or collecting niche fragrances.</p> AMD has brought back its gaming champion from four years ago. The Ryzen 7 5800X3D has been revived in 2026 to breathe new life into the AM4 platform. The Zen 3-based CPU was the best CPU for gaming of its time, thanks to the first-generation 3D V-Cache technology. Since then, however, the competition in our CPU benchmark hierarchy has become more fierce. Today's competition is Intel’s Core i7-14700K, based on the Raptor Lake Refresh architecture. At the time the Ryzen 7 5800X3D released, Intel’s 12th-gen Alder Lake CPUs were its main competition. Here, we revisit the comparison with Intel’s newer Core i7-14700K, which is available around the same price of $350. The focus of this faceoff is to determine which CPU is the superior all-around chip. We will put the two CPUs through a series of tests spanning different categories to ultimately determine which CPU you should buy for your system. This faceoff breaks down how two CPUs compare to each other in a head-to-head battle. If you'd like to read more about either processor, as well as see our full suite of tests, make sure to read our AMD Ryzen 7 5800X3D re-review and Core i7-14700K faceoff . Features and Specifications: AMD Ryzen 7 5800X3D vs Intel Core i7-14700K CPU Street (MSRP) Arch Cores / Threads (P+E) P-Core Base / Boost Clock (GHz) Cache (L2/L3) TDP / PBP or MTP Memory AMD Ryzen 7 5800X3D $600 ($350) — current scalping Zen 3 X3D (TSMC 7nm) 8 / 16 3.4 / 4.5 100 MB 105W / 142W DDR5-7200 MT/s Intel Core i7-14700K $350 - $380 ($410) Raptor Lake Refresh (Intel 7) 20 / 28 (8 + 12) 3.4 / 5.6 61 MB 125W / 253W DDR5-5200 MT/s The Ryzen 7 5800X3D was first launched in April 2022 as a part of the Vermeer desktop CPU family. It is based on the Zen 3 architecture and built on TSMC’s 7nm production process. The CPU features 8 cores and 16 threads, with a TDP of 105W and a PPT of 142W. It has a base clock of 3.4 GHz and can boost up to 4.5 GHz. The 5800X3D only supports DDR4 memory at a rated speed of 3200 MT/s over a dual-channel interface. It is compatible with the AM4 socket, with support for 300-series, 400-series, and 500-series AMD chipsets (though check support with your specific motherboard). It also supports 20 lanes of PCIe Gen 4. However, the 5800X3D does not have integrated graphics. On a more positive note, the Ryzen 7 5800X3D was the first CPU to employ the new 3D V-Cache technology. As a result of stacking the cache vertically on the die, the 5800X3D has a total L3 cache of 96 MB. Of this pool, 64 MB is part of the 3D V-Cache stack. Core overclocking is disabled on the Ryzen 7 5800X3D due to its 3D V-Cache layout; DRAM overclocking still remains available. Its competitor, Intel’s Core i7-14700K, uses a vastly different layout. It features the Raptor Lake Refresh architecture, which is a refined version of the 13th-generation Raptor Lake base architecture. The Core i7-14700K was launched in October 2023 and was built on a 10nm production process (Intel 7). Intel’s 14th-generation CPUs use a hybrid core layout with performance-focused “P-cores” and more efficient “E-cores.” The 14700K also follows this structure, featuring 8 P-cores and 12 E-cores, for a total of 20 cores. In the 14700K, Hyper-Threading is only available on the P-cores, so the CPU has a total of 28 threads. The chip can boost the P-cores up to 5.6 GHz, while the E-core boost clock is 4.3 GHz. Interestingly, the Core i7-14700K supports both DDR4 and DDR5 memory at 3200 MT/s and 5600 MT/s, respectively. The CPU is compatible with the LGA 1700 socket featured in the 600-series and 700-series Intel motherboards. There is also support for 16 PCIe Gen 5 lanes and 4 PCIe Gen 4 lanes. The Core i7-14700K has a TDP of 125W, with a higher PL2 limit of 253W. Integrated graphics are also offered in the 14700K in the form of UHD Graphics 770. There is 33MB of shared L3 cache on the chip. Perhaps more importantly, the Core i7-14700K is fully unlocked for overclocking, which is a big advantage over its competitor for today, though that requires a Z-series motherboard. Zooming out a bit, it is clear that the Core i7-14700K is vastly superior to the Ryzen 7 5800X3D on paper. It is a newer CPU, so it has a better feature set, including PCIe Gen 5 and DDR5 support. It offers more cores, a higher boost clock, integrated graphics, and an unlocked multiplier for overclocking. ⭐Winner: Intel Core i7-14700K Nothing is decided on paper alone, but the Core i7-14700K offers much better specs, newer features, and even has overclocking support. It takes this round quite easily. Gaming Benchmarks and Performance: AMD Ryzen 7 5800X3D vs Intel Core i7-14700K AMD claims to have “re-engineered” the Ryzen 7 5800X3D for its 2026 re-release, so we have tested it again, along with a whole bunch of worthy competitors, including the 14700K. We chose the 1080p resolution for our 16-game test suite in order to maximize the performance differences between the various CPUs. The graphics card used was the GeForce RTX 5090 to keep potential GPU bottlenecks to a minimum. Let’s get into the results. Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Starting off with our 16-game FPS geomean at 1080p, the Core i7-14700K dominates the Ryzen 7 5800X3D with an average result of 166.7 FPS across our tested games, compared to the 145.6 FPS result of the Ryzen 7 5800X3D. That is a 14.5% difference in favor of the 14700K in our performance geomean. In 1% lows, the 14700K leads the Ryzen 7 5800X3D by 20% on average, putting out 114 FPS against the Ryzen’s 95. However, there is another side to this benchmark table. The Core i7-14700K supports both DDR4 and DDR5 memory, so we tested it in both configurations. With DDR4-3200 memory, the 14700K’s advantage vanishes, and instead the Ryzen 7 5800X3D leads by 1.04%, or just 1.5 FPS. The 1% lows are in favor of 14700K by only 3 FPS (3.15%), which is astonishingly close. When the Intel CPU is paired with DDR5 memory, the Ryzen 7 5800X3D’s cache advantage seems to be struggling against the Core i7-14700K’s raw core count and higher boost clock (along with far faster memory speeds). Looking at individual titles, we see a similar pattern with the Core i7-14700K holding a consistent lead over the 5800X3D. In 007 First Light , the 14700K paired with DDR5 memory has a 25.7% lead on average over the 5800X3D. That lead shrinks to 21.5% in Crimson Desert , and the difference is 13.7% in favor of the 14700K in Cyberpunk 2077. Interestingly, the Core i7-14700K leads the entire pack in Flight Simulator 24 , establishing a 26.6% lead over the 5800X3D in this title. The DDR5-equipped 14700K also leads the 5800X3D in Spider-Man 2, Starfield, The Last of Us Part One, Baldur’s Gate 3 , and Counter-Strike 2 . However, when the Core i7-14700K is paired with DDR4-3200 memory, the picture changes completely. The Ryzen 7 5800X3D leads the i7-14700K with DDR4 memory in Baldur’s Gate 3 by 11.7%. In Crimson Desert , the lead is 3.2% for the 5800X3D, and 2.6% in Cyberpunk 2077 . The Ryzen 7 5800X3D sits between the DDR5 and DDR4 versions of the 14700K in a few other titles, including Counter-Strike 2 and DOOM: The Dark Ages . There are also some titles in which the Ryzen 7 5800X3D leads both the DDR4 and DDR5-equipped versions of the Core i7-14700K. In F1 2024 , the Ryzen 7 5800X3D leads the DDR5 14700K by 5.6%, and the DDR4 14700K by 13.7% on average. The same pattern can be seen in Final Fantasy XIV , with a 6.6% lead over the 14700K using DDR5 memory, and in Minecraft RT , with a 18.5% lead over the 14700K using DDR4 memory. It is certainly all over the place when you put both configurations of the 14700K into the mix, but the two behave more like separate CPUs. The long and short of it is that the 14700K with DDR5 memory provides the best gaming performance on average, followed by the Ryzen 7 5800X3D. The DDR4-equipped 14700K is ever-so-slightly slower than the 5800X3D, but it really just depends on the game you’re playing. Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware Tom's Hardware During our testing, the Core i7-14700K averaged 4.93 GHz with DDR5 memory and 4.88 GHz with DDR4 memory. The Ryzen 7 5800X3D could only manage 4.34 GHz, but it sipped only 77.5 watts during our gaming tests. The 14700K DDR5 averaged 132.4 watts, while the DDR4-equipped 14700K averaged a whopping 155.1 watts during gaming. This is why the 14700K with DDR4 reached an average temperature of 80 °C, compared to 62 °C for the 14700K with DDR5 and 59 °C for the 5800X3D. In addition to running the coolest, the Ryzen 7 5800X3D is