AMD Ryzen 5 PRO 8640U vs AMD Ryzen 7 7840H Comparison

Head-to-Head Benchmarks

The benchmark data presents a largely one-sided contest, with the AMD Ryzen 7 7840H winning 15 of the 17 head-to-head comparisons. The most consistent margins appear in Cinebench workloads, where the Ryzen 7 7840H leads by exactly 15.8% across R15, R20, and R23, in both single-core and multi-core tests. For example, in Cinebench R23 multi-core, the Ryzen 7 7840H scores 23,731 against the Ryzen 5 PRO 8640U’s 19,982. The single-core gap is equally pronounced: 3,350 versus 2,821 in R23, a 15.8% advantage.

Beyond Cinebench, the Ryzen 7 7840H widens its lead in several Passmark workloads. The largest delta is in extended instructions, where it scores 25,654 against 19,130 — a 25.4% margin. Data compression shows a 23.6% gap (341,520 vs 260,925), while floating-point math trails at 22.9% (58,724 vs 45,265). Integer math follows closely at 22.6% (96,692 vs 74,875). These are substantial differences, not marginal ones.

The Ryzen 7 7840H also dominates in memory-adjacent tasks. Data encryption shows a 21.4% lead (20,162 vs 15,843), while random string sorting is 17.5% faster (38,938 vs 32,114). The multi-threaded Passmark score favors the Ryzen 7 by 18.4% (27,919 vs 22,795), and physics simulation shows an 11.3% edge (1,301 vs 1,154). Even the smallest win for the Ryzen 7 — finding prime numbers — is a 6% difference (83 vs 78).

The Ryzen 5 PRO 8640U captures only two wins, both in the same Passmark single-thread test. It scores 3,732 versus 3,641 for the Ryzen 7 7840H, a 2.5% margin. This is a narrow but consistent result, appearing in both the `passmark_single_thread` and `passmark_singlethread` entries. It suggests that while the Ryzen 5 PRO loses decisively in multi-core throughput, its per-core efficiency in this specific workload is slightly better. The data does not show any other test where the Ryzen 5 PRO takes the lead — every other benchmark, from Cinebench to compression, favors the Ryzen 7.

Architecture Differences

Both processors are built on the same Zen 4 architecture and 4 nm TSMC process node, with identical transistor counts of 25,000 million and a die size of 178 mm². The cache hierarchy is also identical: 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. Memory support matches as well — both use DDR5 in dual-channel configuration with 89.6 GB/s bandwidth and support ECC memory. PCIe connectivity is the same: Gen 4 with 20 lanes from the CPU.

The core and thread counts differ significantly. The Ryzen 5 PRO 8640U has 6 cores and 12 threads, while the Ryzen 7 7840H has 8 cores and 16 threads — a 33% increase in core count. Clock speeds also favor the Ryzen 7: its base clock is 3.80 GHz versus 3.50 GHz, and its boost clock is 5.10 GHz versus 4.90 GHz. These are modest per-clock advantages, but they compound with the extra cores.

Socket and codename differ. The Ryzen 5 PRO 8640U uses AMD Socket FP7 and carries the Hawk Point codename, while the Ryzen 7 7840H uses AMD Socket FP8 and is codenamed Phoenix. The integrated graphics differ as well: the Ryzen 5 PRO features Radeon 760M, while the Ryzen 7 has Radeon 780M. The TDP ratings reflect their intended use cases — the Ryzen 5 PRO is rated at 28 watts, while the Ryzen 7 is rated at 35 watts, a 7-watt difference that likely explains some of the performance gap.

The Ryzen 5 PRO is part of the 8000 series and was released on 2024-04-15, while the Ryzen 7 belongs to the 7000 series with no release date listed. The part numbers also differ, with the Ryzen 5 PRO listing two variants (FP7r2 and FP7) and the Ryzen 7 listing three (FP7r2, FP7, and FP8). Neither processor has an unlocked multiplier, and both are marked as active production.

Where Each One Wins

The Ryzen 7 7840H is the clear choice for multi-threaded and compute-heavy workloads. Its 15 out of 17 benchmark wins cover Cinebench rendering, data compression, encryption, extended instructions, floating-point math, integer math, physics simulation, and random string sorting. The 15.8% Cinebench lead across all versions suggests that rendering and video encoding tasks will see consistent improvements. The 23.6% data compression advantage indicates strong performance for file archiving and database workloads, while the 22.9% floating-point lead points to scientific computing and 3D modeling.

The Ryzen 5 PRO 8640U wins only in Passmark single-thread performance, with a 2.5% edge. This is a narrow victory, but it suggests that lightly-threaded applications — such as office productivity, web browsing, or single-threaded legacy software — might see a slight benefit from the Ryzen 5. However, the margin is small enough that real-world differences would be difficult to perceive. The Ryzen 5 also has a lower TDP of 28 watts versus 35 watts, which implies better power efficiency for battery-constrained laptops, though the benchmark data does not directly measure power consumption.

The integrated graphics differ, with the Ryzen 7 featuring Radeon 780M versus the Ryzen 5’s Radeon 760M. While no graphics benchmarks are included in the data, the naming convention suggests the Ryzen 7 has a more capable iGPU for light gaming or media tasks. The Ryzen 5 PRO’s 6-core configuration, lower clocks, and lower TDP position it as a more efficiency-focused part, while the Ryzen 7 targets performance.

FAQ

Q: Which processor has a higher multi-core Cinebench R23 score?

A: The AMD Ryzen 7 7840H scores 23,731 in Cinebench R23 multi-core, while the AMD Ryzen 5 PRO 8640U scores 19,982. This gives the Ryzen 7 a 15.8% advantage.

Q: Does the Ryzen 5 PRO 8640U win any benchmark?

A: Yes, it wins the Passmark single-thread test with a score of 3,732 versus 3,641 for the Ryzen 7 7840H, a 2.5% margin. This is the only test where it leads.

Q: How do the core counts compare?

A: The Ryzen 7 7840H has 8 cores and 16 threads, while the Ryzen 5 PRO 8640U has 6 cores and 12 threads. The Ryzen 7 also has a higher base clock (3.80 GHz vs 3.50 GHz) and boost clock (5.10 GHz vs 4.90 GHz).

Q: What is the largest benchmark gap between the two?

A: The largest delta is in Passmark extended instructions, where the Ryzen 7 7840H scores 25,654 against the Ryzen 5 PRO’s 19,130 — a 25.4% difference.

Q: Are both processors built on the same process node?

A: Yes, both use a 4 nm TSMC process with 25,000 million transistors and a 178 mm² die size. They also share the same Zen 4 architecture and identical cache sizes.

Q: What are the TDP differences?

A: The Ryzen 5 PRO 8640U is rated at 28 watts, while the Ryzen 7 7840H is rated at 35 watts. The Ryzen 7 also has a higher boost clock and more cores, which likely contributes to its higher power draw.

Specification Differences

| Specification | AMD Ryzen 5 PRO 8640U | AMD Ryzen 7 7840H |

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

| Series | 8000 series | 7000 series |

| Cores | 6 | 8 |

| Threads | 12 | 16 |

| Base Clock | 3.50 GHz | 3.80 GHz |

| Boost Clock | 4.90 GHz | 5.10 GHz |

| TDP | 28 W | 35 W |

| Socket | AMD Socket FP7 | AMD Socket FP8 |

| Codename | Hawk Point | Phoenix |

| Generation | Ryzen 5 (Zen 4 (Hawk Point)) | Ryzen 7 (Zen 4 (Phoenix)) |

| Integrated Graphics | Radeon 760M | Radeon 780M |

| Release Date | 2024-04-15 | Not listed |

| Part Number | 100-000001318(FP7r2),100-000001378(FP7) | 100-000000955(FP7r2)100-000000964(FP7)100-000001129(FP8) |

The specification table shows that the two processors share identical architecture, process node, transistor count, die size, cache hierarchy, memory support, PCIe configuration, and ECC capability. The differences are limited to core count, clock speeds, TDP, socket, codename, integrated graphics, and series/generation naming. Both have a production status of active and neither has an unlocked multiplier.

The Verdict

The benchmark data is unambiguous: the AMD Ryzen 7 7840H is the superior performer in nearly every measurable category. Its 8 cores, 16 threads, higher clocks, and 35-watt TDP deliver 15.8% better Cinebench scores and up to 25.4% better Passmark extended instruction results. For any workload involving rendering, compression, encryption, or heavy math, the Ryzen 7 7840H is the clear choice.

The Ryzen 5 PRO 8640U offers only one meaningful advantage: a 2.5% lead in Passmark single-thread performance. This is a minor edge that would only matter in specific lightly-threaded tasks. Its lower 28-watt TDP suggests better power efficiency, but the benchmark data does not quantify battery life or power consumption. The Ryzen 5 PRO also features Radeon 760M graphics versus the Ryzen 7’s Radeon 780M, though no graphics benchmarks are available to compare them.

Given the data, the Ryzen 7 7840H is the pick for users who prioritize raw performance, especially in multi-threaded applications. The Ryzen 5 PRO 8640U might appeal to those who value the single-thread edge and lower power envelope, but the benchmark evidence strongly favors the Ryzen 7 across the board. The 2.5% single-thread win is real but narrow, while the Ryzen 7’s multi-core victories are substantial and consistent across multiple test suites.