AMD EPYC 7H12 vs AMD Ryzen 3 8440U Comparison

Head-to-Head Benchmarks

The recorded data shows a complete sweep in favor of the AMD EPYC 7H12 across every Cinebench test in the database. The margin is remarkably consistent, with the EPYC 7H12 leading by roughly 443.8% to 446.8% in all six head-to-head comparisons. This consistency suggests the performance gap is structural, not workload-dependent.

In Cinebench R15 multicore, the EPYC 7H12 scores 5965 against the Ryzen 3 8440U's 1097, a delta of 443.8%. The single-core test tells a similar story: 842 versus 154, a 446.8% advantage for the EPYC. What is striking here is that the EPYC 7H12 wins single-core despite having a lower boost clock (3.30 GHz versus 4.70 GHz). The data implies that architectural efficiency and cache hierarchy play a larger role in this specific benchmark than raw clock speed.

Moving to Cinebench R20, the pattern holds. The EPYC 7H12 posts 24858 in multicore versus 4571 for the Ryzen 3 8440U, again a 443.8% delta. Single-core shows 3509 against 645, a 444% difference. The near-identical percentage deltas across R15 and R20 indicate that the scaling behavior between these two processors is consistent across benchmark generations.

Cinebench R23 multicore delivers the largest absolute gap: 59188 for the EPYC 7H12 versus 10884 for the Ryzen 3 8440U. The delta is 443.8%, matching the R15 and R20 multicore margins exactly. Single-core R23 shows 8355 against 1536, a 443.9% difference. The fact that all multicore deltas are precisely 443.8% and all single-core deltas hover around 444% to 446.8% suggests the benchmark scores scale almost perfectly with the core and thread counts, not with clock speed or memory bandwidth.

The database records 6 wins for the EPYC 7H12 and 0 for the Ryzen 3 8440U. No benchmark in the head-to-head set favors the mobile chip. The Ryzen 3 8440U's higher boost clock, 4.70 GHz versus 3.30 GHz, does not translate into a single victory. This indicates that the EPYC 7H12's 64 cores and 128 threads dominate throughput, while its larger cache and older Zen 2 architecture still outperform Zen 4 in these specific Cinebench workloads.

Architecture Differences

The two processors sit on opposite ends of AMD's design philosophy. The EPYC 7H12 uses Zen 2 architecture on a 7 nm process, built by TSMC with 3,800 million transistors on a 74 mm² die. The Ryzen 3 8440U uses Zen 4 on a 4 nm process, also TSMC, but packs 20,900 million transistors into a 137 mm² die. The density difference is notable: the Ryzen 3 8440U crams over five times more transistors into less than double the silicon area.

Core counts diverge dramatically. The EPYC 7H12 offers 64 cores and 128 threads, while the Ryzen 3 8440U provides 4 cores and 8 threads. This is a 16x difference in cores and threads, which directly explains the multicore benchmark margins. Cache allocation also differs: the EPYC 7H12 has 96 KB of L1 per core, 512 KB of L2 per core, and 256 MB of shared L3. The Ryzen 3 8440U has 64 KB L1 per core, 1 MB L2 per core, and only 8 MB of shared L3. The EPYC's 256 MB L3 is 32 times larger than the Ryzen's 8 MB, a factor that likely drives its single-core wins despite lower clocks.

Memory architecture reflects their intended roles. The EPYC 7H12 supports DDR4 with an eight-channel memory bus and 204.8 GB/s bandwidth. The Ryzen 3 8440U uses DDR5 with a dual-channel bus and 89.6 GB/s bandwidth. ECC memory is available on the EPYC 7H12 but not on the Ryzen 3 8440U. PCIe is Gen 4 on both, though the Ryzen 3 8440U lists 14 lanes (CPU only) while the EPYC 7H12 does not specify lane count in the database.

The Ryzen 3 8440U includes integrated Radeon 740M graphics; the EPYC 7H12 has no integrated graphics. Socket types reflect their markets: the EPYC 7H12 uses AMD Socket SP3 for servers, while the Ryzen 3 8440U uses AMD Socket FP7 for mobile. Power envelopes differ hugely, with the EPYC 7H12 rated at 280 W TDP and the Ryzen 3 8440U at 28 W TDP, though these figures are not used in any benchmark comparisons here. The release dates are separated by over four years: the EPYC 7H12 launched on 2019-09-17, the Ryzen 3 8440U on 2023-12-05.

Where Each One Wins

The data points to a clear division of labor. The EPYC 7H12 wins every recorded Cinebench test, including single-core. This means for any workload that relies on Cinebench-style rendering, compilation, or simulation, the EPYC 7H12 is categorically superior. The 64-core, 128-thread configuration with 256 MB of L3 cache makes it suited for server racks, virtualization hosts, and batch processing where the 443.8% multicore advantage over the Ryzen 3 8440U translates into dramatically shorter job completion times.

The Ryzen 3 8440U, despite losing all head-to-head benchmarks, has its own strengths that the head-to-head set does not capture. The database shows it has PassMark scores for data compression (146273), data encryption (8012), extended instructions (11059), floating point math (23017), integer math (37468), multithread (12805), physics (685), random string sorting (17725), and single thread (3648). The EPYC 7H12 has no PassMark entries in the database, so a direct comparison on those workloads is not possible from the recorded data.

The Ryzen 3 8440U's integrated Radeon 740M graphics and 4.70 GHz boost clock suggest it is designed for mobile responsiveness, light productivity, and power-efficient operation, as indicated by its 28 W TDP and mobile market segment. The EPYC 7H12's server/workstation segment, eight-channel memory, and ECC support point to mission-critical compute. The benchmark data shows that in pure Cinebench throughput, the server chip dominates. But the Ryzen 3 8440U's PassMark profile, with strong compression and encryption scores, indicates it handles real-world desktop tasks like file archiving and secure communications competently within its power envelope.

FAQ

Q: Why does the EPYC 7H12 win single-core benchmarks despite a lower boost clock?

A: The EPYC 7H12 has a boost clock of 3.30 GHz versus 4.70 GHz for the Ryzen 3 8440U, yet it wins Cinebench R23 single-core by 443.9%. The likely explanation is the EPYC's 256 MB shared L3 cache versus the Ryzen's 8 MB, which reduces memory latency for single-threaded workloads. The benchmark data cannot isolate cache effects, but the cache size difference is the most prominent architectural factor.

Q: Is the Ryzen 3 8440U competitive in any benchmark against the EPYC 7H12?

A: Within the head-to-head benchmark set, no. The EPYC 7H12 wins all 6 recorded comparisons. However, the Ryzen 3 8440U has PassMark scores that the EPYC 7H12 lacks, so the database does not support a direct comparison on those workloads. The Ryzen 3 8440U's PassMark single-thread score is 3648, which cannot be compared to any EPYC figure.

Q: What explains the identical 443.8% delta across R15, R20, and R23 multicore tests?

A: The multicore scores scale almost perfectly with core count. The EPYC 7H12 has 64 cores and 128 threads; the Ryzen 3 8440U has 4 cores and 8 threads, a 16x core advantage. A 443.8% advantage corresponds to roughly 5.4x the score, which is less than the 16x core ratio, suggesting per-core efficiency is lower on the EPYC due to older Zen 2 architecture. But the consistency across all three Cinebench versions indicates a stable performance relationship.

Q: Does memory bandwidth affect the benchmark results?

A: The EPYC 7H12 has 204.8 GB/s bandwidth via eight-channel DDR4, while the Ryzen 3 8440U has 89.6 GB/s via dual-channel DDR5. The EPYC's bandwidth is 2.3x higher, which likely helps feed its 64 cores in multicore workloads. However, the single-core wins suggest bandwidth is not the sole factor, since single-threaded tests rarely saturate memory channels.

Q: Are both processors still in production?

A: Yes. The database lists both the AMD EPYC 7H12 and the AMD Ryzen 3 8440U as having an "Active" production status. Their release dates are 2019-09-17 and 2023-12-05 respectively, and neither has been discontinued according to the recorded data.

Q: What is the significance of the percentile scores?

A: The EPYC 7H12 has a percentile rank of 71 versus all CPUs, and the Ryzen 3 8440U has a percentile rank of 70. Despite the EPYC's dominance in head-to-head Cinebench tests, both processors sit within 1 percentile point of each other in the global database. This indicates that average benchmark scores across all tests, not just Cinebench, place them at similar performance tiers relative to the full CPU landscape.

The Verdict

The data directs a clear choice for compute-heavy server workloads: the AMD EPYC 7H12. Its 443.8% to 446.8% advantages across all recorded Cinebench tests make it the only rational selection for rendering farms, data centers, or any environment where multicore throughput is the metric that matters. The 64 cores, 128 threads, 256 MB L3 cache, and 204.8 GB/s memory bandwidth provide the infrastructure for massive parallel workloads. Its 71st percentile rank, though only 1 point above the Ryzen 3 8440U's 70th, confirms it holds its own against the broader CPU market.

The AMD Ryzen 3 8440U is the choice for mobile systems where power efficiency and portability take priority. Its 28 W TDP, integrated Radeon 740M graphics, and 4.70 GHz boost clock make it suitable for laptops and compact devices. The absence of any head-to-head wins against the EPYC 7H12 does not disqualify it, because the benchmark set does not include the PassMark workloads where it shows competence, such as data compression at 146273 and integer math at 37468. Users who need a responsive single-threaded experience in a thin chassis will find the Ryzen 3 8440U's 3648 PassMark single-thread score indicative of capable performance, though it cannot be compared directly to the EPYC.

For buyers, the decision hinges on form factor and workload. The EPYC 7H12 is a server socket processor with ECC memory and eight-channel bandwidth, built for rack deployment. The Ryzen 3 8440U is a mobile processor with integrated graphics and dual-channel DDR5, built for battery-powered use. The benchmark data shows no overlap in their intended use cases, and the 6-0 win tally only reinforces that these are complementary products, not competitors.

Specification Differences

| Specification | AMD EPYC 7H12 | AMD Ryzen 3 8440U |

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

| Cores | 64 | 4 |

| Threads | 128 | 8 |

| Base Clock | 2.60 GHz | 3.00 GHz |

| Boost Clock | 3.30 GHz | 4.70 GHz |

| TDP | 280 W | 28 W |

| Socket | AMD Socket SP3 | AMD Socket FP7 |

| Architecture | Zen 2 | Zen 4 |

| Codename | Rome | Hawk Point |

| Generation | EPYC (Zen 2 (Rome)) | Ryzen 3 (Zen 4 (Hawk Point)) |

| Process Node | 7 nm | 4 nm |

| Transistors | 3,800 million | 20,900 million |

| Die Size | 74 mm² | 137 mm² |

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

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

| L3 Cache | 256 MB (shared) | 8 MB (shared) |

| Memory Support | DDR4 | DDR5 |

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

| Memory Bandwidth | 204.8 GB/s | 89.6 GB/s |

| ECC Memory | Yes | No |

| PCIe | Gen 4 | Gen 4, 14 Lanes (CPU only) |

| Integrated Graphics | None | Radeon 740M |

| Market Segment | Server/Workstation | Mobile |

| Release Date | 2019-09-17 | 2023-12-05 |

| Part Number | 100-000000055 | 100-000001325 (FP7r2) / 100-000001332 (FP7) |

| Avg Benchmark Score | 17120 | 16663 |

| Percentile vs All CPUs | 71 | 70 |