AMD EPYC 7351 vs Intel Core i9-10900X Comparison

The AMD EPYC 7351 wins every single benchmark in this matchup, taking all six head-to-head tests against the Intel Core i9-10900X. Despite the Intel part’s higher clock speeds and desktop-oriented design, the EPYC 7351’s 16 cores and 32 threads consistently outpace the 10-core, 20-thread i9-10900X by roughly 4% across Cinebench workloads. This is a rare case where the server chip is not just competitive in multi-threaded tasks—it also edges out the desktop processor in single-core performance, making the verdict unusually one-sided.

Where Each One Wins

The EPYC 7351 wins everywhere that matters in this comparison. In multi-core workloads, the AMD chip’s advantage comes from having 60% more cores and 60% more threads—16 cores and 32 threads versus 10 cores and 20 threads. The data confirms this: the EPYC 7351 scores 1989 in Cinebench R15 multi-core against 1910 for the i9-10900X, and it extends that lead to 8291 versus 7961 in R20 multi-core, and 19742 versus 18957 in R23 multi-core. Every multi-core test shows the same 4% delta in favor of AMD.

Surprisingly, the EPYC 7351 also wins single-core tests. The i9-10900X has a much higher boost clock of 4.70 GHz compared to the EPYC’s 2.90 GHz, yet the AMD chip still scores 280 versus 269 in R15 single-core, 1170 versus 1123 in R20 single-core, and 2787 versus 2676 in R23 single-core. The single-core deltas range from 3.9% to 4%, meaning the EPYC’s architectural efficiency compensates for its 1.8 GHz clock disadvantage. For the i9-10900X, there is no benchmark category where it takes a win—its only consolation is that the margins are slim and consistent, never exceeding 4%.

Architecture Differences

The two processors come from fundamentally different design philosophies. The Intel Core i9-10900X uses the Cascade Lake architecture (Cascade Lake-X codename) on a 14 nm process from Intel’s own foundry. It is a desktop part with 10 cores and 20 threads, base clock of 3.70 GHz, and boost clock of 4.70 GHz. Its cache layout features 64 KB L1 per core, 1 MB L2 per core, and 19.25 MB shared L3. It supports DDR4 memory over a quad-channel bus, has no ECC memory support, and uses PCIe Gen 3. The socket is Intel Socket 2066.

The AMD EPYC 7351 uses the Zen architecture (Naples codename) on a 14 nm process from GlobalFoundries. It is a server/workstation part with 16 cores and 32 threads, base clock of 2.40 GHz, and boost clock of 2.90 GHz. Its cache configuration is markedly different: 96 KB L1 per core, 512 KB L2 per core, and a large 64 MB shared L3 cache. The EPYC supports DDR4 over an eight-channel memory bus with a rated bandwidth of 170.6 GB/s, and it includes ECC memory support. It uses PCIe Gen 3 and fits the AMD Socket SP3. The EPYC also has a transistor count of 4,800 million on a 213 mm² die, while the Intel part has no transistor or die size data in the pack.

The most consequential differences are core count, memory bandwidth, and cache. The EPYC’s 64 MB L3 cache is over three times the i9’s 19.25 MB, and its eight-channel memory bus provides substantially more bandwidth than quad-channel—though the exact bandwidth figure for Intel is not listed. The EPYC’s lower clocks are offset by more cores and a larger cache pool, which explains its benchmark parity in single-core and advantage in multi-core. The i9-10900X counters with higher clocks and a more recent release date (October 2019 versus June 2017 for the EPYC).

Head-to-Head Benchmarks

The Cinebench suite tells a consistent story. In Cinebench R15 multi-core, the EPYC 7351 scores 1989 against the i9-10900X’s 1910, a 4% difference. The single-core R15 result is tighter: 280 versus 269, a 3.9% gap. Moving to Cinebench R20, the EPYC wins multi-core with 8291 versus 7961 (4% ahead) and single-core with 1170 versus 1123 (also 4% ahead). The pattern holds in R23: the EPYC scores 19742 versus 18957 in multi-core and 2787 versus 2676 in single-core, both exactly 4% better.

The Geekbench results are only available for the Intel part, so they cannot be compared directly. The i9-10900X posts 10104 in Geekbench multi-core and 1438 in single-core, but without an EPYC score for those tests, the head-to-head data rests entirely on the six Cinebench results. Across those six, the EPYC wins all of them with deltas between 3.9% and 4%. This consistency suggests the EPYC’s advantage is structural—not a quirk of any single workload—and that the i9-10900X cannot overcome the core-count deficit even in lightly threaded tests.

Looking at the nearest rivals for context, the i9-10900X sits near the Intel Celeron G6900 (average score 5561, delta -0.1%) and Intel Core i9-11900KB (5587, -0.6%). The EPYC 7351’s nearest rivals include the AMD EPYC 7F32 (5703, +0.1%) and the Intel Core i9-7920X (5673, +0.7%). The EPYC’s average benchmark score of 5710 is about 2.8% higher than the i9-10900X’s 5555, and both chips sit at the 61st percentile of all CPUs. This means the EPYC is not only beating the i9 in this direct matchup but also lands slightly higher in the broader performance distribution.

FAQ

Q: Which processor wins more benchmarks in this comparison?

A: The AMD EPYC 7351 wins all six head-to-head benchmarks. It takes every Cinebench test—R15, R20, and R23, in both single-core and multi-core—with deltas of 3.9% to 4% over the Intel Core i9-10900X.

Q: Does the Intel Core i9-10900X have any advantage in clock speed?

A: Yes, the i9-10900X has a base clock of 3.70 GHz and a boost clock of 4.70 GHz, compared to the EPYC 7351’s 2.40 GHz base and 2.90 GHz boost. Despite this, the EPYC still wins single-core benchmarks by about 4%.

Q: How do the core counts differ between the two?

A: The EPYC 7351 has 16 cores and 32 threads, while the Intel Core i9-10900X has 10 cores and 20 threads. The EPYC’s 60% higher core count is the primary driver of its multi-core wins.

Q: What are the memory bandwidth differences?

A: The EPYC 7351 uses an eight-channel DDR4 memory bus with a rated bandwidth of 170.6 GB/s. The i9-10900X uses a quad-channel DDR4 bus, but its bandwidth figure is not listed in the data.

Q: Do both processors support ECC memory?

A: No. The AMD EPYC 7351 supports ECC memory, while the Intel Core i9-10900X does not. This reflects the EPYC’s server/workstation positioning versus the i9’s desktop focus.

Q: Which processor has a larger L3 cache?

A: The EPYC 7351 has 64 MB of shared L3 cache, while the i9-10900X has 19.25 MB of shared L3. The EPYC also has larger L1 cache per core (96 KB versus 64 KB), though the i9 has larger L2 per core (1 MB versus 512 KB).

The Verdict

The data points to a clear winner: the AMD EPYC 7351 is the better-performing processor in every measurable category. It wins all six Cinebench tests, with a 4% margin in multi-core and a 3.9–4% margin in single-core. The EPYC’s 16 cores and 32 threads, combined with its 64 MB L3 cache and eight-channel memory bandwidth, give it a structural advantage that the i9-10900X’s higher clocks cannot overcome. Even in single-core tests where the Intel part’s 4.70 GHz boost should dominate, the EPYC’s Zen architecture proves more efficient.

For a user prioritizing raw multi-threaded performance, the EPYC 7351 is the obvious choice—it delivers more cores, more threads, ECC memory support, and a wider memory bus. For a desktop user who needs a 10-core processor with a higher boost clock and a more recent release date, the i9-10900X offers those specific traits, but it loses every benchmark in this comparison. The EPYC also holds a slightly higher average benchmark score (5710 versus 5555) and sits in the same 61st percentile, so there is no scenario in this data where the Intel part comes out ahead. The verdict is unambiguous: the EPYC 7351 wins this matchup outright.

Specification Differences

| Field | Intel Core i9-10900X | AMD EPYC 7351 |

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

| Series | Core 10th Gen | EPYC 7001 series |

| Manufacturer | Intel | AMD |

| Cores | 10 | 16 |

| Threads | 20 | 32 |

| Base Clock | 3.70 GHz | 2.40 GHz |

| Boost Clock | 4.70 GHz | 2.90 GHz |

| TDP | 165 W | 170 W |

| Socket | Intel Socket 2066 | AMD Socket SP3 |

| Architecture | Cascade Lake | Zen |

| Codename | Cascade Lake-X | Naples |

| Generation | Core i9 (X-Series 10th Gen) | EPYC (Zen (Naples)) |

| Process Node | 14 nm | 14 nm |

| Foundry | Intel | GlobalFoundries |

| L1 Cache | 64 KB (per core) | 96 KB (per core) |

| L2 Cache | 1 MB (per core) | 512 KB (per core) |

| L3 Cache | 19.25 MB (shared) | 64 MB (shared) |

| Memory Bus | Quad-channel | Eight-channel |

| Memory Bandwidth | — | 170.6 GB/s |

| ECC Memory | No | Yes |

| PCIe | Gen 3 | Gen 3 |

| Market Segment | Desktop | Server/Workstation |

| Release Date | 2019-10-18 | 2017-06-28 |

| Part Number | — | PS7351BEVGPAF |

| Transistors | — | 4,800 million |

| Die Size | — | 213 mm² |