AMD Ryzen 5 8645HS vs AMD Ryzen AI 7 350 Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive overall victory for the AMD Ryzen AI 7 350, which wins 14 of the 15 head-to-head benchmarks against the AMD Ryzen 5 8645HS. The most dramatic margin appears in PassMark physics, where the Ryzen AI 7 350 scores 1349 against 1095, a 23.2% advantage. This is the largest single delta in the comparison and suggests a substantial lead in simulation or physics-heavy workloads.

Cinebench results reinforce the same pattern. In Cinebench R23 multi-core, the Ryzen AI 7 350 posts 16014.5 versus 13220, a 21.1% lead. The single-core gap is smaller but still meaningful: 1958 versus 1714, a 14.2% advantage. Cinebench R15 tells a similar story, with an 18.3% multi-core lead (2477 vs 2094) and an 8.9% single-core lead (294 vs 270).

In PassMark integer math, the Ryzen AI 7 350 scores 85651 against 72640, a 17.9% edge. Floating point math shows a comparable gap: 53230 versus 44833, an 18.7% advantage. Data compression also favors the newer chip, with 304089 versus 265483, a 14.5% lead. Extended instructions land at 21678 versus 20003, an 8.4% advantage.

The Ryzen AI 7 350 also wins the multithread test by 10.4% (24935 vs 22586) and the single-thread test by 5% (3834 vs 3653). Random string sorting shows a narrower 4.8% margin (33266 vs 31748), and find prime numbers comes in at 6.7% (80 vs 75).

The lone victory for the Ryzen 5 8645HS is in PassMark data encryption, where it scores 15588 versus 15244. That is a 2.2% advantage, a narrow but real win. Every other metric points to the Ryzen AI 7 350, and the average benchmark score reflects this: 34222 for the Ryzen AI 7 350 versus 33244 for the Ryzen 5 8645HS. Percentile rankings are close, with the Ryzen AI 7 350 sitting at the 84th percentile against all CPUs and the Ryzen 5 8645HS at the 83rd.

Architecture Differences

The two processors belong to different AMD generations and use different core architectures. The Ryzen AI 7 350 is built on Zen 5, part of the Krackan Point line within the Ryzen AI 300 series. The Ryzen 5 8645HS uses Zen 4, from the Hawk Point family in the 8000 series. Both are manufactured on a 4 nm process at TSMC, so the node is identical, but the underlying microarchitecture differs.

Core counts diverge significantly. The Ryzen AI 7 350 has 8 cores and 16 threads, while the Ryzen 5 8645HS has 6 cores and 12 threads. The Ryzen AI 7 350 therefore offers two more physical cores and four more threads, which explains much of its multi-threaded benchmark advantage. Cache layouts also differ. The Ryzen AI 7 350 uses 80 KB of L1 per core and 1 MB of L2 per core, with 8 MB of L3. The Ryzen 5 8645HS uses 64 KB of L1 per core and 1 MB of L2 per core, with a larger 16 MB shared L3. The total L3 is larger on the Ryzen 5 8645HS, yet the Ryzen AI 7 350 still wins most throughput tests, indicating that core count and architecture matter more in these workloads.

Clock speeds are another differentiator. The Ryzen AI 7 350 has a 2.00 GHz base clock and a 5.00 GHz boost clock. The Ryzen 5 8645HS has a much higher base clock of 4.30 GHz but the same 5.00 GHz boost. The higher base clock on the Ryzen 5 8645HS does not translate into benchmark wins, suggesting that the Zen 5 architecture on the Ryzen AI 7 350 delivers better instructions per clock despite the lower base frequency.

Thermal design power also differs: the Ryzen AI 7 350 is rated at 28 W, while the Ryzen 5 8645HS is rated at 45 W. This is a notable distinction, as the Ryzen AI 7 350 achieves its higher benchmark scores while being rated for a lower power envelope. The integrated graphics differ as well: the Ryzen AI 7 350 carries a Radeon 860M, while the Ryzen 5 8645HS has a Radeon 760M. Memory support is slightly different, with the Ryzen AI 7 350 supporting both DDR5 and LPDDR5X, whereas the Ryzen 5 8645HS supports DDR5 only. Both use dual-channel memory with 89.6 GB/s bandwidth, and neither supports ECC memory.

PCIe lane counts differ. The Ryzen AI 7 350 has Gen 4 with 16 lanes (CPU only), while the Ryzen 5 8645HS has Gen 4 with 20 lanes (CPU only). The Ryzen 5 8645HS also lists a transistor count of 25,000 million and a die size of 178 mm², while the Ryzen AI 7 350 lists a die size of 195 mm² with no transistor figure. Both use AMD Socket FP8, and both have locked multipliers.

FAQ

Q: Which processor wins more benchmarks?

A: The AMD Ryzen AI 7 350 wins 14 of the 15 head-to-head benchmarks. The AMD Ryzen 5 8645HS wins only one, PassMark data encryption.

Q: How large is the multi-core performance gap?

A: In Cinebench R23 multi-core, the Ryzen AI 7 350 leads by 21.1% (16014.5 vs 13220). In Cinebench R15 multi-core, the lead is 18.3% (2477 vs 2094).

Q: Is the single-core performance meaningfully different?

A: Yes, but the gap is smaller than the multi-core gap. The Ryzen AI 7 350 leads by 14.2% in Cinebench R23 single-core (1958 vs 1714) and by 8.9% in Cinebench R15 single-core (294 vs 270). PassMark single-thread shows a 5% lead (3834 vs 3653).

Q: Does the higher base clock of the Ryzen 5 8645HS help it?

A: The Ryzen 5 8645HS has a 4.30 GHz base clock versus 2.00 GHz on the Ryzen AI 7 350, but it still loses nearly every benchmark. The Zen 5 architecture of the Ryzen AI 7 350 appears to compensate for the lower base clock.

Q: What about power consumption?

A: The Ryzen AI 7 350 is rated at 28 W TDP, while the Ryzen 5 8645HS is rated at 45 W TDP. Despite the lower rating, the Ryzen AI 7 350 delivers higher scores in the recorded benchmarks.

Q: Which processor has more cores and threads?

A: The Ryzen AI 7 350 has 8 cores and 16 threads. The Ryzen 5 8645HS has 6 cores and 12 threads.

Specification Differences

| Specification | AMD Ryzen AI 7 350 | AMD Ryzen 5 8645HS |

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

| Architecture | Zen 5 | Zen 4 |

| Codename | Krackan Point | Hawk Point |

| Generation | Ryzen AI 300 (Zen 5 / Zen 5c) | Ryzen 5 (Zen 4 (Hawk Point)) |

| Cores | 8 | 6 |

| Threads | 16 | 12 |

| Base Clock | 2.00 GHz | 4.30 GHz |

| Boost Clock | 5.00 GHz | 5.00 GHz |

| TDP | 28 W | 45 W |

| L1 Cache | 80 KB (per core) | 64 KB (per core) |

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

| L3 Cache | 8 MB | 16 MB (shared) |

| Transistors | Not listed | 25,000 million |

| Die Size | 195 mm² | 178 mm² |

| Memory Support | DDR5, LPDDR5X | DDR5 |

| PCIe | Gen 4, 16 Lanes (CPU only) | Gen 4, 20 Lanes (CPU only) |

| Integrated Graphics | Radeon 860M | Radeon 760M |

| Release Date | 2025-01-05 | 2023-12-05 |

| Part Number | 100-000001601 | 100-000001320 (FP7r2), 100-000001385 (FP7), 100-000001310 (FP8) |

Where Each One Wins

The AMD Ryzen AI 7 350 is the clear winner for multi-threaded productivity. Its 8-core, 16-thread configuration delivers a 21.1% advantage in Cinebench R23 multi-core and an 18.3% lead in Cinebench R15 multi-core compared to the Ryzen 5 8645HS. It also wins PassMark multithread by 10.4% and PassMark physics by 23.2%, making it the better choice for rendering, compilation, simulation, or any workload that scales with core count. The Ryzen AI 7 350 also leads in integer math by 17.9% and floating-point math by 18.7%, which suggests strong performance in general computation and scientific workloads. Its data compression score is 14.5% higher, and extended instructions come in 8.4% ahead. For single-threaded tasks, the Ryzen AI 7 350 still holds an advantage, though smaller: 14.2% in Cinebench R23 single-core and 5% in PassMark single-thread.

The AMD Ryzen 5 8645HS has exactly one recorded win: PassMark data encryption, where it beats the Ryzen AI 7 350 by 2.2% (15588 vs 15244). This is a narrow margin, but it indicates that for encryption-specific workloads, the older Zen 4 chip holds a slight edge. The Ryzen 5 8645HS also has a higher base clock (4.30 GHz vs 2.00 GHz) and more PCIe lanes (20 vs 16), which may matter for system configuration rather than raw CPU benchmarks. Its 16 MB of shared L3 cache is double the 8 MB on the Ryzen AI 7 350, though this does not translate into benchmark wins in the recorded data.

For users prioritizing battery life or thermal efficiency, the lower 28 W TDP of the Ryzen AI 7 350 is noteworthy, especially since it outperforms the 45 W Ryzen 5 8645HS in almost every test. The Ryzen 5 8645HS remains a capable processor, but the data consistently favors the Ryzen AI 7 350 outside of encryption tasks.

The Verdict

The benchmark data is unambiguous: the AMD Ryzen AI 7 350 is the stronger processor in nearly every category. It wins 14 of 15 head-to-head tests, with advantages ranging from 4.8% in random string sorting to 23.2% in physics. Its average benchmark score is 34222 versus 33244 for the Ryzen 5 8645HS, and it sits one percentile higher in the overall CPU ranking (84th vs 83rd). The Ryzen AI 7 350 achieves this while being rated for a lower TDP (28 W vs 45 W), which makes it the more efficient choice on paper.

The Ryzen 5 8645HS is not without merit. It wins the encryption test by a small margin, has a higher base clock, more PCIe lanes, and a larger L3 cache. But these advantages do not show up as benchmark victories in the recorded data. For anyone choosing between these two mobile processors, the Ryzen AI 7 350 is the pick for general performance, multi-threaded work, and single-threaded responsiveness. The Ryzen 5 8645HS is only preferable if encryption throughput is the sole priority, given its 2.2% edge in that specific test. Otherwise, the Ryzen AI 7 350 dominates the comparison.