AMD Ryzen 9 8945HX vs AMD Ryzen AI 5 PRO 435 Comparison

The AMD Ryzen 9 8945HX and the AMD Ryzen AI 5 PRO 435 occupy distinct corners of the mobile processor market. The data in the database shows a clear performance hierarchy, with the 8945HX dominating multi-threaded workloads while the AI 5 PRO 435 counters with advantages in power efficiency and platform features. The benchmark results reveal a stark contrast in compute capacity, driven by fundamental differences in core count, architecture, and process technology.

Head-to-Head Benchmarks

The Ryzen 9 8945HX wins all 11 recorded head-to-head benchmark comparisons, but the margins vary wildly depending on the workload. The largest gap appears in the passmark_find_prime_numbers test, where the 8945HX scores 262 against 57 for the AI 5 PRO 435, a 359.6% advantage. This test is heavily dependent on raw integer throughput and memory bandwidth, both of which favor the 16-core flagship.

In passmark_data_encryption, the 8945HX posts 40836 versus 11267, a 262.4% lead. Encryption workloads scale well with core count and benefit from the 8945HX’s larger L3 cache. The integer math test shows a 220.6% difference (195180 vs 60879), while random string sorting delivers a 215.9% delta (78781 vs 24936). These results indicate that the 8945HX’s 16 cores and 32 threads provide a massive parallel advantage over the 6-core, 12-thread AI 5 PRO 435.

The extended instructions test shows a 197.9% lead (49823 vs 16724), and data compression shows a 191.1% gap (677755 vs 232803). Floating point math comes in at 185.7% (117453 vs 41114). The passmark_multithread score of 51405 versus 19091 represents a 169.3% advantage, while physics simulation shows a 117.9% lead (2168 vs 995).

The closest contest is in single-thread performance. The 8945HX scores 3907 in passmark_single_thread against 3757 for the AI 5 PRO 435, a mere 4% difference. This narrow margin is notable because it demonstrates that the Zen 5 architecture in the AI 5 PRO 435 nearly matches the Zen 4 implementation in the 8945HX on a per-core basis, despite the latter’s higher boost clock of 5.40 GHz versus 4.50 GHz. The AI 5 PRO 435’s architectural efficiency closes most of the gap that clock speed would otherwise create.

Architecture Differences

The two processors come from different design generations and use different process nodes. The 8945HX uses Zen 4 architecture on a 5 nm TSMC process, while the AI 5 PRO 435 uses Zen 5 architecture on a 4 nm TSMC process. The 4 nm node offers higher transistor density and improved power efficiency, which helps explain the AI 5 PRO 435’s competitive single-thread scores despite its lower clocks.

The core configurations are dramatically different. The 8945HX packs 16 cores and 32 threads, while the AI 5 PRO 435 has 6 cores and 12 threads. The 8945HX’s Dragon Range codename indicates a high-performance mobile HX design, whereas Gorgon Point for the AI 5 PRO 435 suggests a more mainstream PRO series focused on business laptops. The 8945HX uses AMD Socket FL1, while the AI 5 PRO 435 uses AMD Socket FP8.

Cache hierarchies differ substantially. The 8945HX provides 64 KB of L1 per core, 1 MB of L2 per core, and 64 MB of L3 cache. The AI 5 PRO 435 offers 80 KB of L1 per core, also 1 MB of L2 per core, but only 4 MB of L3 cache. The 16x difference in L3 capacity is a major factor in the 8945HX’s multi-threaded dominance, as it can hold far more working data closer to the cores. The larger per-core L1 in the AI 5 PRO 435 (80 KB vs 64 KB) is a minor architectural refinement that aids single-thread efficiency.

The integrated graphics solutions also differ. The 8945HX pairs with Radeon 610M, while the AI 5 PRO 435 uses Radeon 840M. The 840M is a newer implementation that benefits from the Zen 5 platform’s improvements. Memory support shows the AI 5 PRO 435 accepting both DDR5 and LPDDR5X, whereas the 8945HX only lists DDR5. The AI 5 PRO 435 also supports ECC memory, which the 8945HX does not, making the PRO chip more suitable for error-sensitive workloads.

PCIe connectivity favors the 8945HX with Gen 5 and 28 lanes (CPU only), while the AI 5 PRO 435 provides Gen 4 with 14 lanes. The 8945HX’s multiplier is unlocked, allowing overclocking, while the AI 5 PRO 435 is locked. Memory bandwidth is slightly higher on the AI 5 PRO 435 at 89.6 GB/s compared to 83.2 GB/s for the 8945HX, despite the latter’s much larger cache.

The 8945HX has a TDP of 55 watts, while the AI 5 PRO 435 sips just 28 watts. This power envelope difference explains the performance gap: the 8945HX consumes nearly double the power to feed its 16 cores. The 8945HX uses 13,140 million transistors on a 2x 71 mm² die, while the AI 5 PRO 435’s transistor count and die size are not recorded in the database.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Ryzen 9 8945HX has 16 cores and 32 threads, while the AMD Ryzen AI 5 PRO 435 has 6 cores and 12 threads.

Q: What are the boost clocks for each chip?

A: The 8945HX boosts up to 5.40 GHz, while the AI 5 PRO 435 boosts up to 4.50 GHz. The base clocks are 2.50 GHz and 2.00 GHz respectively.

Q: How much L3 cache does each processor offer?

A: The 8945HX provides 64 MB of L3 cache. The AI 5 PRO 435 provides 4 MB of L3 cache.

Q: Which processor supports ECC memory?

A: The AMD Ryzen AI 5 PRO 435 supports ECC memory. The AMD Ryzen 9 8945HX does not.

Q: What is the single-thread performance difference?

A: The 8945HX scores 3907 in passmark_single_thread versus 3757 for the AI 5 PRO 435, a 4% advantage for the 8945HX.

Q: What process nodes are used?

A: The 8945HX uses a 5 nm TSMC process. The AI 5 PRO 435 uses a 4 nm TSMC process.

Q: Which chip has a higher memory bandwidth?

A: The AI 5 PRO 435 has a memory bandwidth of 89.6 GB/s, which is higher than the 8945HX’s 83.2 GB/s.

Specification Differences

| Specification | AMD Ryzen 9 8945HX | AMD Ryzen AI 5 PRO 435 |

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

| Cores | 16 | 6 |

| Threads | 32 | 12 |

| Base Clock | 2.50 GHz | 2.00 GHz |

| Boost Clock | 5.40 GHz | 4.50 GHz |

| TDP | 55 W | 28 W |

| Socket | AMD Socket FL1 | AMD Socket FP8 |

| Architecture | Zen 4 | Zen 5 |

| Codename | Dragon Range | Gorgon Point |

| Process Node | 5 nm | 4 nm |

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

| L3 Cache | 64 MB | 4 MB |

| Memory Support | DDR5 | DDR5, LPDDR5X |

| ECC Memory | No | Yes |

| PCIe | Gen 5, 28 Lanes | Gen 4, 14 Lanes |

| Integrated Graphics | Radeon 610M | Radeon 840M |

| Multiplier Unlocked | Yes | No |

| Memory Bandwidth | 83.2 GB/s | 89.6 GB/s |

| Transistors | 13,140 million | Not recorded |

| Die Size | 2x 71 mm² | Not recorded |

Where Each One Wins

The AMD Ryzen 9 8945HX wins in every benchmark category recorded. Its strengths are most pronounced in heavily multi-threaded workloads. Data encryption shows a 262.4% advantage, integer math a 220.6% lead, and random string sorting a 215.9% edge. These workloads scale directly with core count and cache size, and the 8945HX’s 16 cores, 32 threads, and 64 MB L3 cache provide overwhelming parallel capability. The 8945HX also leads in floating point math by 185.7% and physics simulation by 117.9%, making it the clear choice for content creation, scientific computing, and any task that can utilize more than a handful of threads.

The AI 5 PRO 435’s wins are more subtle and do not appear in the benchmark scores. Its 28 W TDP versus 55 W for the 8945HX indicates a substantially lower power draw, which translates to longer battery life and thinner, lighter laptop designs. The 4 nm process node and Zen 5 architecture deliver nearly equivalent single-thread performance (within 4%) while using far less power. The AI 5 PRO 435’s support for LPDDR5X memory allows for more compact system designs with soldered RAM, and ECC memory support makes it suitable for data-integrity-sensitive tasks. Its PCIe Gen 4 lanes, while slower than Gen 5, are sufficient for most business laptop peripherals.

The 8945HX is the superior choice for users who need maximum compute throughput in a mobile form factor, such as developers compiling large projects, video editors rendering timelines, or researchers running simulations. The AI 5 PRO 435 is positioned for professional mobile users who prioritize portability, battery endurance, and platform stability over raw performance. The database shows the 8945HX at the 95th percentile of all CPUs, while the AI 5 PRO 435 sits at the 86th percentile, but the latter achieves its ranking with less than half the power envelope and a fraction of the core count. For users who seldom exceed 6 threads, the AI 5 PRO 435 offers most of the single-thread speed with significantly better efficiency characteristics.