AMD Ryzen 7 8840HX vs AMD Ryzen AI 7 445 Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive sweep: the AMD Ryzen 7 8840HX wins all 13 head-to-head benchmark comparisons against the AMD Ryzen AI 7 445. The most lopsided result appears in prime number finding, where the 8840HX scores 304 against 56, a 442.9% advantage. That gap reflects the sheer throughput difference between a 12-core, 24-thread part and a 6-core, 12-thread part, but it is not the only area of dominance.

In Cinebench R23 multi-core, the 8840HX posts 25,265 versus 10,590, a 138.6% lead. The single-core result is far closer: 1,857 versus 1,806, a 2.8% margin. That narrow single-thread gap is notable because the two CPUs use different architectures, with the 8840HX based on Zen 4 and the AI 7 445 based on Zen 5. The newer Zen 5 design closes most of the per-core gap despite a lower boost clock of 4.60 GHz versus 5.10 GHz.

PassMark integer math shows the 8840HX at 146,506 against 58,332, a 151.2% lead. Floating point math follows a similar pattern: 86,747 versus 39,362, a 120.4% advantage. Data compression delivers 496,427 versus 215,812, a 130% lead, while data encryption shows the largest percentage gap outside prime numbers: 29,919 versus 10,519, a 184.4% margin.

Extended instruction workloads, which often stress AVX and similar feature sets, favor the 8840HX by 130.8% (36,527 versus 15,826). Random string sorting, a memory-latency sensitive task, gives the 8840HX a 146.8% edge (57,971 versus 23,488). Multi-threaded PassMark shows 41,732 versus 18,115, a 130.4% lead, and physics simulation scores 2,185 versus 976, a 123.9% margin.

The single-thread PassMark result, 3,958 versus 3,591, translates to a 10.2% lead for the 8840HX. This is larger than the Cinebench R23 single-core gap, which suggests the two tests weight different aspects of single-core performance. The Cinebench result indicates the architectural efficiency of Zen 5 nearly neutralizes the clock disadvantage in that workload, while PassMark's single-thread test still favors the higher-boost Zen 4 part.

Looking at the broader database context, the 8840HX sits at the 94th percentile among all CPUs, while the AI 7 445 sits at the 79th percentile. The 8840HX has an average benchmark score of 71,797, placing it within 0.2% of the Intel Core Ultra 7 265KF (71,910) and 0.8% behind the Intel Xeon 6724P (72,396). The AI 7 445's average of 26,936 is nearly identical to the Intel Core i7-1370P (26,900, a 0.1% difference) and only 0.3% ahead of the AMD Ryzen 5 7545U (26,849). In other words, the 8840HX competes in a much higher performance tier, while the AI 7 445 lands among efficient mid-range mobile parts.

Where Each One Wins

The 8840HX wins every recorded benchmark, so the use-case split is not about which CPU wins specific tasks, but rather about the magnitude of the win and the workload characteristics that produce it.

The largest margins appear in prime number finding (442.9%), data encryption (184.4%), and integer math (151.2%). These are heavily parallel workloads that scale with core count and thread count. The 8840HX's 12 cores and 24 threads, combined with 64 MB of shared L3 cache, allow it to sustain high throughput across many simultaneous operations. The AI 7 445, with 6 cores, 12 threads, and only 4 MB of L3 cache, simply runs out of parallel resources in these tests.

The smallest margins appear in single-core tests: 2.8% in Cinebench R23 single-core and 10.2% in PassMark single-thread. This is the closest competition between the two parts. The Zen 5 architecture in the AI 7 445, despite a lower boost clock and a 28 W TDP, nearly matches the older Zen 4 design in lightly threaded work. For applications that are primarily single-threaded, the practical difference between these two CPUs is small.

Memory bandwidth favors the AI 7 445 in the specification sheet: 89.6 GB/s versus 83.2 GB/s. The AI 7 445 also supports LPDDR5X memory, while the 8840HX supports DDR5 only. Despite this, the 8840HX wins random string sorting by 146.8%, a test that is sensitive to cache behavior. The 64 MB L3 cache on the 8840HX likely compensates for its lower memory bandwidth in this workload.

The AI 7 445's strengths are not visible in the benchmark scores. It has a lower TDP of 28 W versus 55 W, uses a 4 nm process versus 5 nm, and supports ECC memory. These are operational advantages rather than performance advantages. The data shows the AI 7 445 delivers comparable single-core performance and competitive memory bandwidth while consuming less power, but it cannot match the raw multi-threaded output of the 8840HX.

Architecture Differences

The two CPUs come from different architectural generations and physical designs. The 8840HX uses Zen 4 on a 5 nm TSMC process, with a transistor count of 13,140 million and a die size of 2x 71 mm². The AI 7 445 uses Zen 5 and Zen 5c cores on a 4 nm TSMC process. The database does not list a transistor count or die size for the AI 7 445, so a direct physical comparison is not possible.

The cache hierarchy differs substantially. The 8840HX provides 64 KB of L1 cache per core, 1 MB of L2 per core, and 64 MB of shared L3. The AI 7 445 provides 80 KB of L1 per core, 1 MB of L2 per core, but only 4 MB of L3. That 16x difference in L3 capacity (64 MB versus 4 MB) is the largest architectural gap between the two parts and likely explains the 8840HX's dominant showing in cache-sensitive workloads like random string sorting.

The 8840HX is built on the Dragon Range codename, part of the 8000 series, and uses AMD Socket FL1. The AI 7 445 uses the Gorgon Point codename, part of the Ryzen AI 400 series, and uses AMD Socket FP8. The 8840HX has an unlocked multiplier, while the AI 7 445 does not. This makes the 8840HX the only one of the two that supports user overclocking.

PCIe support also differs. The 8840HX offers Gen 5 with 28 lanes (CPU only), while the AI 7 445 offers Gen 4 with 14 lanes (CPU only). The 8840HX therefore provides both a newer PCIe generation and double the lane count, which matters for external GPUs and high-speed storage.

Integrated graphics differ as well. The 8840HX uses the Radeon 610M, while the AI 7 445 uses the Radeon 840M. The database does not provide benchmark scores for these iGPUs, so no performance comparison is possible from this data. The AI 7 445 supports both DDR5 and LPDDR5X memory, while the 8840HX supports DDR5 only. ECC memory support is exclusive to the AI 7 445.

Process node differences point in favor of the AI 7 445: 4 nm versus 5 nm, both from TSMC. The release dates also differ, with the 8840HX released on 2025-04-22 and the AI 7 445 on 2026-01-04.

FAQ

Q: Which CPU has more cores and threads?

A: The AMD Ryzen 7 8840HX has 12 cores and 24 threads. The AMD Ryzen AI 7 445 has 6 cores and 12 threads.

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

A: In Cinebench R23 multi-core, the 8840HX scores 25,265 against 10,590, which is 138.6% higher. In PassMark multi-thread, the gap is 130.4% (41,732 versus 18,115).

Q: Is the AI 7 445 competitive in single-core performance?

A: The 8840HX leads by 2.8% in Cinebench R23 single-core (1,857 versus 1,806) and by 10.2% in PassMark single-thread (3,958 versus 3,591). The AI 7 445 is close, but it does not win either test.

Q: What is the L3 cache difference?

A: The 8840HX has 64 MB of shared L3 cache. The AI 7 445 has 4 MB of L3 cache. That is a 16x difference in favor of the 8840HX.

Q: Does the AI 7 445 support ECC memory?

A: Yes, the AI 7 445 has ECC memory support set to true. The 8840HX does not support ECC memory.

Q: Which CPU has a higher boost clock?

A: The 8840HX boosts to 5.10 GHz. The AI 7 445 boosts to 4.60 GHz.

Specification Differences

| Field | AMD Ryzen 7 8840HX | AMD Ryzen AI 7 445 |

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

| Cores | 12 | 6 |

| Threads | 24 | 12 |

| Base clock | 2.90 GHz | 2.00 GHz |

| Boost clock | 5.10 GHz | 4.60 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 |

| Transistors | 13,140 million | Not listed |

| Die size | 2x 71 mm² | Not listed |

| L1 cache | 64 KB per core | 80 KB per core |

| L3 cache | 64 MB shared | 4 MB |

| Memory support | DDR5 | DDR5, LPDDR5X |

| Memory bandwidth | 83.2 GB/s | 89.6 GB/s |

| ECC memory | No | Yes |

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

| Integrated graphics | Radeon 610M | Radeon 840M |

| Multiplier unlocked | Yes | No |

| Release date | 2025-04-22 | 2026-01-04 |

| Part number | 100-000001850 | 100-000001935 |

The Verdict

The benchmark data paints a clear picture. The AMD Ryzen 7 8840HX outperforms the AMD Ryzen AI 7 445 in every recorded test, with multi-core margins ranging from 120.4% to 442.9%. Its 12 cores, 24 threads, and 64 MB of L3 cache make it the superior choice for any workload that scales with parallel resources, from data compression to encryption to integer math. The 8840HX also carries the only unlocked multiplier of the two, giving it overclocking headroom that the AI 7 445 lacks.

The AI 7 445 is not without merit. Its Zen 5 architecture nearly matches the 8840HX in Cinebench R23 single-core, trailing by just 2.8%. It has a lower TDP of 28 W, a smaller 4 nm process node, support for LPDDR5X memory, higher memory bandwidth at 89.6 GB/s, and ECC memory support. Its 79th percentile ranking places it alongside efficient mid-range mobile processors like the Intel Core i7-1370P and AMD Ryzen 5 7545U.

The 8840HX's 94th percentile ranking puts it in the company of desktop-class parts like the Intel Core Ultra 7 265KF and Xeon server chips. For users who prioritize raw throughput and have access to adequate cooling, the 8840HX is the clear choice. For users who prioritize power efficiency, ECC memory support, and a newer socket with LPDDR5X compatibility, the AI 7 445 offers a narrower but real set of advantages. The benchmark results, however, leave no ambiguity about which CPU is faster.