AMD Ryzen 7 5800X3D vs Intel Core i9-10900K Comparison

The AMD Ryzen 7 5800X3D and Intel Core i9-10900K are two end-of-life desktop processors that nonetheless deliver closely matched average benchmark scores, with the AMD part edging ahead by a 0.1% deltaPct. The Ryzen 7 5800X3D claims 13 head-to-head wins against the Intel chip's 10, yet the nature of those victories reveals a starkly different performance profile: AMD dominates in multi-threaded compute and encryption workloads, while Intel's advantage lies in raw frequency-driven tasks and specific memory-latency-sensitive operations. Both processors sit within a tight band of the overall CPU percentile ranking, with the AMD chip at the 80th percentile and the Intel chip at the 79th.

Head-to-Head Benchmarks

The most dramatic single result in this comparison is the PassMark data encryption test, where the Ryzen 7 5800X3D scores 20,258 against the Core i9-10900K's 7,796, a staggering 159.9% advantage. This is not a marginal win; it is a complete rout that suggests fundamental architectural superiority in cryptographic workloads. Similarly, the PassMark find prime numbers test shows the AMD processor at 227 versus Intel's 63, a 260.3% delta that underscores the Zen 3 core's efficiency in integer-heavy loops. The PassMark physics test tells the same story, with the AMD chip scoring 2,884 compared to Intel's 1,029, a 180.3% lead that indicates far better handling of physics simulation threads.

The multi-core picture is consistently favorable to AMD in several key suites. In Cinebench R15 multi-core, the Ryzen 7 5800X3D scores 2,413 against Intel's 1,904, a 26.7% win. PassMark multi-thread shows 28,309 versus 22,452, a 26.1% advantage. Geekbench multi-core also goes AMD's way at 11,765 versus 10,583, an 11.2% margin. Even in single-threaded tests, the AMD part wins more often than not: 3DMark single-thread shows 884 versus 851 (3.9%), PassMark single-thread shows 3,234 versus 3,113 (3.9%), and Geekbench single-core shows 2,017 versus 1,711 (a substantial 17.9% lead).

However, the Intel Core i9-10900K posts some decisive counter-wins that shift the overall narrative. The biggest is in Cinebench R23 single-core, where Intel scores 2,667 against AMD's 1,452 — a 45.6% blowout that reflects the Intel chip's much higher boost clock. That same boost advantage carries Cinebench R23 multi-core to Intel at 18,895 versus 14,317, a 24.2% margin, despite the AMD chip winning the older R15 version of the same test. The 3DMark suite at higher thread counts favors Intel decisively: 3DMark 16-threads goes to Intel at 8,257 versus 7,299 (11.6% delta), and 3DMark max-threads sees Intel at 8,938 versus 7,285, an 18.5% gap. Intel also takes PassMark random string sorting (46,389 vs 33,776, a 27.2% lead) and PassMark data compression (375,336 vs 329,688, a 12.2% margin).

FAQ

Q: Which processor has the higher overall average benchmark score?

A: The AMD Ryzen 7 5800X3D has an average benchmark score of 27,896, which is marginally higher than the Intel Core i9-10900K's 27,872, representing a 0.1% deltaPct in AMD's favor.

Q: Why does the Intel chip win Cinebench R23 multi-core but lose Cinebench R15 multi-core?

A: The Intel Core i9-10900K scores 18,895 in Cinebench R23 multi-core versus the AMD's 14,317, a 24.2% advantage, but in Cinebench R15 multi-core the AMD chip wins 2,413 to 1,904, a 26.7% margin. The data shows the two chips respond differently to the workload scaling in each test version.

Q: Is the AMD processor better for encryption workloads?

A: Yes, overwhelmingly. The Ryzen 7 5800X3D scores 20,258 in PassMark data encryption versus the Intel's 7,796, a 159.9% advantage, making it the clear choice for that specific workload.

Q: Does the Intel processor have any single-threaded wins?

A: Yes, in Cinebench R15 single-core it wins 268 to 241 (a 10.1% delta) and in Cinebench R23 single-core it wins 2,667 to 1,452 (a 45.6% delta), though the AMD chip wins most other single-thread tests like 3DMark and Geekbench.

Q: How do these chips compare in terms of core and thread counts?

A: The Intel Core i9-10900K has 10 cores and 20 threads, while the AMD Ryzen 7 5800X3D has 8 cores and 16 threads, meaning Intel has a physical core advantage that shows up in some heavily threaded tests.

Q: Which processor has a higher memory bandwidth rating?

A: The AMD Ryzen 7 5800X3D lists a memory bandwidth of 51.2 GB/s, while the Intel Core i9-10900K lists 46.9 GB/s, giving AMD an advantage in that specification.

Architecture Differences

The two processors come from fundamentally different design philosophies and manufacturing generations. The AMD Ryzen 7 5800X3D is built on the Zen 3 architecture with the Vermeer codename, fabricated on a 7 nm process at TSMC, with a transistor count of 8,850 million packed into a 74 mm² die. In contrast, the Intel Core i9-10900K uses the Comet Lake architecture, built on a 14 nm process at Intel's own foundry, with a significantly larger 206 mm² die size and no listed transistor count. This process node difference is stark: 7 nm versus 14 nm, which partially explains the AMD chip's efficiency in certain workloads despite having fewer cores.

Cache configurations diverge sharply. Both share the same 64 KB L1 cache per core, but the L2 cache differs: AMD provides 512 KB per core while Intel provides 256 KB per core. The L3 cache is where the AMD part pulls ahead dramatically, offering 96 MB shared versus Intel's 20 MB shared. This 76 MB difference is the defining architectural trait of the 5800X3D and directly contributes to its dominance in tests like PassMark physics and encryption, where large working sets benefit from the massive L3 footprint. The Intel chip compensates with a higher boost clock of 5.30 GHz versus AMD's 4.50 GHz, and a higher base clock of 3.70 GHz versus 3.40 GHz.

Other platform-level differences are equally significant. The AMD processor uses the AMD Socket AM4 and supports PCIe Gen 4 with 20 lanes (CPU only), while the Intel chip uses Intel Socket 1200 and is limited to PCIe Gen 3 with 16 lanes (CPU only). Memory support is DDR4 dual-channel for both, but AMD supports ECC memory while Intel does not. The Intel part includes integrated graphics in the form of UHD Graphics 630, whereas the AMD part has no integrated graphics listed. The Intel chip also has an unlocked multiplier, allowing overclocking, while the AMD chip's multiplier is locked. The TDP figures reflect the Intel part's higher power envelope at 125 watts versus AMD's 105 watts.

The Verdict

The data paints a clear picture for workload-specific recommendations. If the priority is multi-threaded throughput in Cinebench R23, the Intel Core i9-10900K is the answer, delivering an 18,895 score that beats the AMD chip by 24.2%. The Intel part is also the pick for memory-latency-sensitive tasks like random string sorting, where it leads by 27.2%, and for data compression, where it holds a 12.2% edge. Its unlocked multiplier and integrated graphics provide additional flexibility that the locked, GPU-less AMD part cannot match.

However, the AMD Ryzen 7 5800X3D is the superior choice for a broader range of compute-heavy scenarios. It wins 13 of 23 head-to-head benchmarks, including a 159.9% margin in encryption and a 260.3% margin in prime number finding. Its 26.1% lead in PassMark multi-thread and 26.7% lead in Cinebench R15 multi-core show that it can outperform the Intel chip even with fewer cores and threads. The AMD part also leads in Geekbench single-core by 17.9%, which is notable given the Intel chip's higher boost clock. For users prioritizing security-related workloads, physics simulation, or general integer math, the 5800X3D is the clear winner. The 0.1% overall average score difference between the two is negligible, but the distribution of wins heavily favors AMD in compute density, while Intel's wins are concentrated in tests that reward peak clock speed and specific memory access patterns.

Specification Differences

| Specification | AMD Ryzen 7 5800X3D | Intel Core i9-10900K |

|---|---|---|

| Cores | 8 | 10 |

| Threads | 16 | 20 |

| Base Clock | 3.40 GHz | 3.70 GHz |

| Boost Clock | 4.50 GHz | 5.30 GHz |

| TDP | 105 W | 125 W |

| Socket | AMD Socket AM4 | Intel Socket 1200 |

| Architecture | Zen 3 | Comet Lake |

| Process Node | 7 nm | 14 nm |

| Foundry | TSMC | Intel |

| Die Size | 74 mm² | 206 mm² |

| L2 Cache | 512 KB (per core) | 256 KB (per core) |

| L3 Cache | 96 MB (shared) | 20 MB (shared) |

| Memory Bandwidth | 51.2 GB/s | 46.9 GB/s |

| ECC Memory | Yes | No |

| PCIe | Gen 4, 20 Lanes (CPU only) | Gen 3, 16 Lanes (CPU only) |

| Integrated Graphics | None | UHD Graphics 630 |

| Multiplier Unlocked | No | Yes |

| Launch MSRP | $449 | $547 |