AMD Ryzen 5 PRO 8640U vs AMD Ryzen 7 8845HS Comparison

The Verdict

The data splits these two Hawk Point parts into clear roles. The AMD Ryzen 5 PRO 8640U is the efficiency-focused pick with surprising single-core strength, while the AMD Ryzen 7 8845HS is the raw throughput leader. Benchmark results show the Ryzen 7 8845HS wins 12 of 15 head-to-head tests, with most victories coming by 20-25%. The Ryzen 5 PRO 8640U counters with notable wins in two Cinebench tests, including a 59.5% margin in Cinebench R23 single-core — a result that demands attention. The Ryzen 5 PRO 8640U also carries ECC memory support and a lower 28W TDP, making it the sensible choice for compact, always-on systems or workstations where data integrity matters. The Ryzen 7 8845HS, with its 45W TDP and 8 cores, is for users who prioritize multi-threaded workload throughput over power efficiency. Both CPUs sit at the 81st percentile versus all CPUs, but their average benchmark scores tell different stories: the Ryzen 5 PRO 8640U averages 30254, while the Ryzen 7 8845HS averages 29955. That 1% gap in favor of the smaller chip underscores that this is not a simple "more cores wins" comparison. Choose the Ryzen 5 PRO 8640U for single-thread responsiveness, ECC support, and lower power draw. Choose the Ryzen 7 8845HS for heavy parallel workloads, integrated graphics grunt, and sustained multi-core performance.

FAQ

Q: Which CPU has better single-core performance?

A: The Ryzen 5 PRO 8640U wins Cinebench R15 single-core (284 vs 276, a 2.9% margin) and Cinebench R23 single-core (2821 vs 1769, a 59.5% margin). However, PassMark single-thread scores are nearly identical: 3732 for the Ryzen 5 PRO 8640U versus 3738 for the Ryzen 7 8845HS, a 0.2% difference favoring the Ryzen 7.

Q: How much faster is the Ryzen 7 8845HS in multi-core workloads?

A: The Ryzen 7 8845HS leads Cinebench R15 multi-core (2575 vs 2014, 21.8% faster), PassMark multi-thread (28498 vs 22795, 20% faster), and PassMark integer math (97747 vs 74875, 23.4% faster). The exception is Cinebench R23 multi-core, where the Ryzen 5 PRO 8640U scores 19982 versus 16192 — a 23.4% win for the smaller chip.

Q: Do both CPUs use the same architecture?

A: Yes. Both are Zen 4 architecture with the Hawk Point codename, built on TSMC's 4 nm process with 25,000 million transistors and a 178 mm² die size. They share the same L1 (64 KB per core), L2 (1 MB per core), and L3 (16 MB shared) cache layout.

Q: What are the key specification differences?

A: The Ryzen 7 8845HS has 8 cores/16 threads versus 6 cores/12 threads on the Ryzen 5 PRO 8640U, with higher clocks (3.80 GHz base / 5.10 GHz boost vs 3.50 GHz / 4.90 GHz) and higher TDP (45W vs 28W). The Ryzen 7 uses Socket FP8 and has the Radeon 780M iGPU; the Ryzen 5 uses Socket FP7 and has the Radeon 760M. The Ryzen 5 PRO supports ECC memory; the Ryzen 7 does not.

Q: Which CPU has better integrated graphics?

A: The Ryzen 7 8845HS ships with the Radeon 780M, while the Ryzen 5 PRO 8640U has the Radeon 760M. The benchmark data does not include graphics tests, so the performance difference is not quantified here, but the model numbers indicate a higher-tier iGPU on the Ryzen 7.

Q: Which CPU is more power-efficient?

A: The Ryzen 5 PRO 8640U has a 28W TDP versus 45W for the Ryzen 7 8845HS. The lower TDP suggests the Ryzen 5 PRO 8640U is better suited for thinner laptops or systems with limited cooling, though the benchmark data does not include power consumption measurements.

Architecture Differences

Both processors are built on the same Zen 4 architecture with the Hawk Point codename, manufactured by TSMC on a 4 nm process. The transistor count is identical at 25,000 million, and the die size matches at 178 mm². The cache hierarchy is exactly the same: 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. The memory support is also identical — DDR5 with a dual-channel bus and 89.6 GB/s bandwidth. The PCIe implementation matches as well: Gen 4 with 20 lanes from the CPU.

The architectural differences are limited to core count, clock speeds, and power envelope. The Ryzen 7 8845HS offers 8 cores and 16 threads, while the Ryzen 5 PRO 8640U has 6 cores and 12 threads. The Ryzen 7 operates at a 3.80 GHz base and 5.10 GHz boost, versus 3.50 GHz base and 4.90 GHz boost for the Ryzen 5. The TDP differs substantially — 45W for the Ryzen 7 versus 28W for the Ryzen 5. The socket also differs: the Ryzen 7 uses AMD Socket FP8, while the Ryzen 5 uses AMD Socket FP7. Both are locked multipliers, and both are active production parts.

The integrated graphics differ — the Ryzen 7 has the Radeon 780M, the Ryzen 5 has the Radeon 760M. ECC memory support is exclusive to the Ryzen 5 PRO 8640U. The release dates differ by about four months, with the Ryzen 7 8845HS launching on 2023-12-05 and the Ryzen 5 PRO 8640U on 2024-04-15. The part numbers also vary, with the Ryzen 7 available in multiple socket variants (FP7r2, FP7, FP8) while the Ryzen 5 lists FP7r2 and FP7.

Specification Differences

The table below highlights only the fields where the two processors differ:

| Specification | AMD Ryzen 5 PRO 8640U | AMD Ryzen 7 8845HS |

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

| Cores | 6 | 8 |

| Threads | 12 | 16 |

| Base Clock | 3.50 GHz | 3.80 GHz |

| Boost Clock | 4.90 GHz | 5.10 GHz |

| TDP | 28W | 45W |

| Socket | AMD Socket FP7 | AMD Socket FP8 |

| ECC Memory | Yes | No |

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

| Release Date | 2024-04-15 | 2023-12-05 |

All other specifications — architecture, process node, foundry, transistor count, die size, cache sizes, memory support, memory bus, memory bandwidth, PCIe config, market segment, production status, and unlocked multiplier status — are identical between the two.

Head-to-Head Benchmarks

The Ryzen 7 8845HS dominates the head-to-head results, winning 12 of 15 tests. The largest margins come in PassMark extended instructions (25642 vs 19130, 25.4% faster), data compression (344439 vs 260925, 24.2% faster), and floating point math (59254 vs 45265, 23.6% faster). Integer math also favors the Ryzen 7 by 23.4% (97747 vs 74875). PassMark multi-thread shows a 20% lead (28498 vs 22795), and random string sorting goes to the Ryzen 7 by 22.5% (41446 vs 32114). Data encryption is 22.4% faster (20416 vs 15843). Physics simulation favors the Ryzen 7 by 14.3% (1347 vs 1154). Prime number finding shows a 10.3% edge (87 vs 78). The single-thread PassMark scores are nearly tied, with the Ryzen 7 edging ahead by 0.2% (3738 vs 3732).

The Ryzen 5 PRO 8640U wins three tests, and two of those wins are substantial. Cinebench R23 multi-core goes to the Ryzen 5 by 23.4% (19982 vs 16192) — a surprising result given the Ryzen 7's extra cores. Cinebench R23 single-core is even more lopsided: 2821 vs 1769, a 59.5% margin for the Ryzen 5. Cinebench R15 single-core also favors the Ryzen 5, but by a slim 2.9% (284 vs 276). The Ryzen 7 wins Cinebench R15 multi-core by 21.8% (2575 vs 2014), which makes the R23 multi-core result even more anomalous.

The overall benchmark picture shows a processor that wins most tests by 20-25% (the Ryzen 7) against one that wins two tests by 23% and 59.5% (the Ryzen 5). The average benchmark scores reflect this split: 30254 for the Ryzen 5 PRO 8640U versus 29955 for the Ryzen 7 8845HS. The Ryzen 5's nearest rival, the AMD Ryzen 7 2700X, scores 30213 with a 0.1% delta. The Ryzen 7's closest match is the AMD Ryzen 7 7840HS at 29955 with a 0% delta. Notably, the Ryzen 5 PRO 8640U outperforms its rival list entries by small margins, while the Ryzen 7 8845HS matches its top rival exactly.

Where Each One Wins

The Ryzen 7 8845HS is the clear winner for heavy parallel workloads. Any task that scales with cores and threads — video rendering, 3D simulation, data compression, encryption, or floating-point-heavy scientific computing — will see 20-25% better throughput on the Ryzen 7. The PassMark integer math score of 97747 versus 74875 makes it the pick for code compilation and spreadsheet-style number crunching. The multi-thread score of 28498 versus 22795 reinforces this. If sustained multi-core performance is the priority, the Ryzen 7's 45W TDP is the price you pay, and the data shows it delivers.

The Ryzen 5 PRO 8640U wins in specific scenarios that defy its core count. The Cinebench R23 multi-core result (19982 vs 16192) suggests that under certain workloads, the Ryzen 5 can actually outperform the Ryzen 7 despite having two fewer cores. The single-core Cinebench R23 result (2821 vs 1769) is the standout: a 59.5% margin that makes the Ryzen 5 the better choice for lightly-threaded applications like office productivity, web browsing, or legacy software that relies on single-thread speed. The Cinebench R15 single-core win (284 vs 276) confirms this pattern, though by a much smaller margin.

The Ryzen 5 PRO also wins on features that matter for specific buyers. ECC memory support makes it the safer choice for workstations handling financial data, scientific records, or any environment where memory errors are unacceptable. The lower 28W TDP makes it easier to cool in thin-and-light laptops or fanless designs. The Ryzen 7's lack of ECC support and higher power draw are trade-offs that buyers need to weigh against its multi-core advantages.

For gaming laptops, the Ryzen 7 8845HS has the edge on paper with the Radeon 780M versus the Radeon 760M, though no graphics benchmarks are included in this data. For business laptops and portable workstations, the Ryzen 5 PRO 8640U's combination of ECC, lower TDP, and superior single-core Cinebench scores makes it the more compelling option. The Ryzen 7 wins the multi-core war, but the Ryzen 5 wins the efficiency and reliability battle — and in the right workloads, it wins outright.