AMD EPYC 7443 vs Intel Core i5-10400F Comparison

# FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7443 has 24 cores and 48 threads, while the Intel Core i5-10400F has 6 cores and 12 threads. That is a 4x difference in both core count and thread count.

Q: How do the two processors compare in single-threaded Cinebench R23 performance?

A: The AMD EPYC 7443 scores 6802 in Cinebench R23 single-core, which is 78.7% higher than the Intel Core i5-10400F's 1451. The EPYC 7443 wins decisively in this test.

Q: What is the difference in L3 cache capacity?

A: The AMD EPYC 7443 features 128 MB of shared L3 cache, whereas the Intel Core i5-10400F has only 12 MB of shared L3 cache. The EPYC 7443 offers more than 10 times the L3 cache.

Q: Which processor supports ECC memory?

A: The AMD EPYC 7443 supports ECC memory, while the Intel Core i5-10400F does not. This makes the EPYC 7443 more suitable for error-sensitive server workloads.

Q: What are the memory bandwidth specifications for each?

A: The AMD EPYC 7443 has an eight-channel memory bus delivering 204.8 GB/s of bandwidth. The Intel Core i5-10400F uses a dual-channel bus with 42.7 GB/s. The EPYC 7443 provides nearly 5 times the memory bandwidth.

Q: How do the processors compare in multi-threaded Cinebench R20?

A: The AMD EPYC 7443 scores 20236 in Cinebench R20 multi-core, versus 4318 for the Intel Core i5-10400F. That represents a 78.7% advantage for the EPYC 7443.

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Architecture Differences

The two processors come from fundamentally different market segments and design philosophies. The Intel Core i5-10400F is a 6-core, 12-thread desktop part built on the Comet Lake architecture, using Intel's 14 nm process node. The AMD EPYC 7443 is a 24-core, 48-thread server/workstation processor based on Zen 3 (Milan), manufactured on TSMC's 7 nm node. The process node difference alone — 14 nm versus 7 nm — explains much of the efficiency and density gap.

Cache hierarchies diverge sharply. The Intel part has 64 KB of L1 cache per core and 256 KB of L2 per core, with 12 MB of shared L3. The AMD EPYC 7443 also has 64 KB of L1 per core, but doubles L2 to 512 KB per core and offers 128 MB of shared L3 — a 10x increase in last-level cache. This large L3 pool is critical for server workloads with large working sets.

Memory architecture is another major differentiator. The Intel Core i5-10400F uses dual-channel DDR4 with 42.7 GB/s bandwidth and no ECC support. The AMD EPYC 7443 uses eight-channel DDR4 with 204.8 GB/s bandwidth and full ECC support. The EPYC's memory subsystem is built for capacity and reliability in data center environments.

PCIe connectivity also differs substantially. The Intel part provides Gen 3 with 16 CPU lanes, while the EPYC 7443 offers Gen 4 with 128 CPU lanes — 8 times the lane count and a newer generation, enabling far more expansion and I/O throughput.

The transistor count and die configuration highlight the EPYC's server pedigree: it uses 16,600 million transistors across 4x 81 mm² chiplets, whereas the Intel part's transistor count and die size are not listed. The EPYC 7443 also carries a launch MSRP of $2010, while the Intel part has no listed launch MSRP.

Finally, the release dates differ: the Intel Core i5-10400F launched on 2020-04-29, and the AMD EPYC 7443 followed on 2021-03-14. Both are currently marked as Active in production status.

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The Verdict

The benchmark data is unambiguous. In every single head-to-head comparison, the AMD EPYC 7443 wins by a margin of 78.7%. There are zero wins for the Intel Core i5-10400F across the six Cinebench tests. The EPYC 7443 dominates both multi-core and single-core workloads.

For users building a desktop gaming or general-purpose PC, the Intel Core i5-10400F remains a functional entry point — its percentile ranking of 68 places it in the same percentile as the EPYC 7443, and its average benchmark score of 14185 is actually slightly higher than the EPYC's 13936. However, the EPYC's nearest rivals include the Intel Core i5-10400 (with an average score of 14037), which highlights that the EPYC's average is dragged down by its limited benchmark suite coverage.

For server, workstation, or heavy multi-threaded workloads, the AMD EPYC 7443 is the clear choice. Its 24 cores, 128 MB L3 cache, eight-channel memory, and ECC support are all aligned with enterprise requirements. The 78.7% advantage in every Cinebench test is not a marginal improvement — it is a generational leap in compute capacity.

The data suggests that the Intel Core i5-10400F is suitable for cost-sensitive desktop builds where single-threaded responsiveness matters more than raw throughput. Meanwhile, the EPYC 7443 is designed for environments where multi-threaded performance, memory bandwidth, and reliability are paramount. Neither processor is a substitute for the other; they serve entirely different niches.

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Specification Differences

| Specification | Intel Core i5-10400F | AMD EPYC 7443 |

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

| Cores | 6 | 24 |

| Threads | 12 | 48 |

| Base Clock | 2.90 GHz | 2.85 GHz |

| Boost Clock | 4.30 GHz | 4.00 GHz |

| TDP | 65 W | 200 W |

| Socket | Intel Socket 1200 | AMD Socket SP3 |

| Architecture | Comet Lake | Zen 3 (Milan) |

| Process Node | 14 nm (Intel) | 7 nm (TSMC) |

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

| L3 Cache | 12 MB (shared) | 128 MB (shared) |

| Memory Bus | Dual-channel | Eight-channel |

| Memory Bandwidth | 42.7 GB/s | 204.8 GB/s |

| ECC Memory | No | Yes |

| PCIe | Gen 3, 16 Lanes | Gen 4, 128 Lanes |

| Market Segment | Desktop | Server/Workstation |

| Release Date | 2020-04-29 | 2021-03-14 |

| Launch MSRP | Not listed | $2010 |

| Transistors | Not listed | 16,600 million |

| Die Size | Not listed | 4x 81 mm² |

The base clocks are nearly identical (2.90 GHz vs 2.85 GHz), but the Intel part boosts higher at 4.30 GHz versus 4.00 GHz. The TDP difference is stark: 65 W for Intel versus 200 W for AMD, reflecting the EPYC's much larger core count and memory controllers.

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Head-to-Head Benchmarks

The head-to-head data covers six Cinebench tests, and the AMD EPYC 7443 wins all of them by exactly 78.7%. The consistency of this margin is striking — it suggests a uniform performance ratio across both single-core and multi-core workloads.

In Cinebench R15 multi-core, the EPYC 7443 scores 4856 versus 1036 for the Intel Core i5-10400F. The EPYC delivers roughly 4.7 times the multi-threaded render performance. This is the largest absolute gap in the dataset, driven by the 4x core advantage and superior memory bandwidth.

The single-core results tell a more surprising story. In Cinebench R15 single-core, the EPYC 7443 scores 685, while the Intel part scores 146 — a 78.7% advantage for the EPYC. Despite having a lower boost clock (4.00 GHz vs 4.30 GHz), the EPYC's Zen 3 architecture delivers substantially higher instructions-per-clock. This is not merely a core-count win; it is an architectural superiority.

Cinebench R20 follows the same pattern. The EPYC 7443 scores 20236 in multi-core versus 4318 for the Intel part, and 2856 in single-core versus 609. The R23 results continue the trend: 48183 versus 10283 in multi-core, and 6802 versus 1451 in single-core.

The data shows that the EPYC 7443 does not just scale better with more threads — it also executes single threads faster. The 78.7% delta in single-core tests suggests that the Zen 3 core design is fundamentally more efficient than the older Comet Lake core, despite the Intel part's higher boost clock.

For the Intel Core i5-10400F, the best result in the entire head-to-head set is its Cinebench R23 multi-core score of 10283, which is still 78.7% behind the EPYC's 48183. There is no workload category in this dataset where the Intel part comes close.

Outside the head-to-head, the Intel part has additional benchmark data that the EPYC lacks, including 3DMark scores and Passmark tests. The Intel Core i5-10400F achieves a Passmark multi-thread score of 12115 and a single-thread score of 2541. Its average benchmark score of 14185 places it in the 68th percentile of all CPUs. The EPYC 7443, despite having only six Cinebench scores, also lands in the 68th percentile with an average of 13936. This percentile parity is notable: the EPYC's average is dragged down by having no 3DMark or Passmark data, but its Cinebench performance is overwhelmingly superior.