AMD Ryzen 7 8745HX vs AMD Ryzen AI 7 345 Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive sweep for the AMD Ryzen 7 8745HX across all 11 shared benchmark tests, with the narrowest margin in single-threaded workloads and the largest in prime number generation. The Ryzen 7 8745HX wins every head-to-head comparison, but the magnitude of each victory varies substantially by workload type.

The closest contest is in single-thread performance. The Ryzen 7 8745HX scores 3879 in PassMark single-thread testing, while the Ryzen AI 7 345 scores 3875, a delta of just 0.1%. For everyday responsiveness and lightly threaded applications, the two processors are effectively indistinguishable. This near-parity in single-core performance is notable given the architectural differences between the two chips.

Multi-threaded workloads tell a completely different story. The Ryzen 7 8745HX delivers a PassMark multithread score of 31517, which is 58.2% higher than the Ryzen AI 7 345's 19927. The gap widens further in integer math, where the 8745HX scores 100328 against 63475 for the AI 7 345, a 58.1% advantage. Floating-point math shows a 45.4% lead, with scores of 61972 and 42621 respectively.

Data compression favors the 8745HX by 53.2%, with scores of 363759 versus 237484. The encryption test produces the second-largest percentage gap: the 8745HX scores 21840, which is 84.9% ahead of the AI 7 345's 11814. Extended instruction performance shows a 62.5% lead for the 8745HX, at 27638 versus 17003.

The largest single delta appears in the prime number search test. The 8745HX scores 159, while the AI 7 345 manages only 62, a difference of 156.5%. Random string sorting also shows a wide gap, with the 8745HX ahead by 74.9% (44494 versus 25435). Physics simulation results put the 8745HX at 1681, which is 54.4% higher than the AI 7 345's 1089.

Looking at overall average benchmark scores, the database places the Ryzen 7 8745HX at 60104, which ranks it in the 92nd percentile of all CPUs. Its nearest rivals are the AMD Ryzen 9 7945HX at 60099 (0% delta), the Intel Core i9-14900F at 60008 (0.2% ahead of the 8745HX), and the AMD Ryzen 9 7945HX3D at 59641 (0.8% behind). The Ryzen AI 7 345, by contrast, has an average score of 29461, placing it in the 81st percentile. Its nearest rivals include the AMD Ryzen 7 3800X at 29447 (0% delta), the AMD EPYC 9654 at 29409 (0.2% behind), and the Intel Core i5-13500HX at 29270 (0.7% behind).

The average benchmark score difference between the two chips is substantial. At 60104, the 8745HX produces more than double the average score of the AI 7 345's 29461. This places the two processors in completely different performance tiers despite both being mobile parts from AMD.

Architecture Differences

The Ryzen 7 8745HX uses the Zen 4 architecture under the Dragon Range codename, while the Ryzen AI 7 345 is built on a hybrid Zen 5 / Zen 5c configuration under the Krackan Point codename. This fundamental architectural split explains much of the benchmark behavior. The 8745HX belongs to the 8000 series and the Ryzen 7 generation, whereas the AI 7 345 belongs to the Ryzen AI 300 generation.

Process technology differs as well. The 8745HX is fabricated on a 5 nm process at TSMC, while the AI 7 345 uses a 4 nm process, also at TSMC. The 8745HX has a transistor count of 6,570 million on a 71 mm² die. The database does not list transistor count or die size for the AI 7 345.

Core and thread counts diverge sharply. The 8745HX contains 8 cores and 16 threads, while the AI 7 345 has 6 cores and 12 threads. Clock speeds also favor the 8745HX: it has a base clock of 3.60 GHz and a boost clock of 5.10 GHz, compared to 2.00 GHz base and 4.60 GHz boost for the AI 7 345. The thermal design power reflects this difference, with the 8745HX rated at 55 W and the AI 7 345 at 28 W.

Cache layouts are distinct. The 8745HX provides 64 KB of L1 cache per core, 1 MB of L2 per core, and 32 MB of shared L3 cache. The AI 7 345 uses 80 KB of L1 per core, 1 MB of L2 per core, but only 4 MB of L3 cache. Neither chip has 3D V-Cache. The smaller L3 on the AI 7 345 likely contributes to its performance gap in memory-sensitive workloads.

Memory support differs in scope. The 8745HX supports DDR5 over a dual-channel bus with 83.2 GB/s of bandwidth. The AI 7 345 supports both DDR5 and LPDDR5X, also dual-channel, with slightly higher bandwidth at 89.6 GB/s. Neither chip supports ECC memory.

PCIe connectivity is another differentiator. The 8745HX offers PCIe Gen 5 with 28 CPU lanes, while the AI 7 345 uses PCIe Gen 4 with 14 CPU lanes. This makes the 8745HX more suitable for high-bandwidth discrete components. Integrated graphics also differ: the 8745HX pairs with a Radeon 610M, while the AI 7 345 includes a Radeon 840M.

The 8745HX uses AMD Socket FL1, has an unlocked multiplier, and carries part number 100-000001851. The AI 7 345 uses AMD Socket FP8, has a locked multiplier, and carries part number 100-000002122. Both are active mobile parts. The release dates show the AI 7 345 launched earlier, on January 14, 2025, while the 8745HX followed on April 22, 2025.

FAQ

Q: Which processor is faster in single-threaded workloads?

A: The Ryzen 7 8745HX leads by a razor-thin margin. It scores 3879 in PassMark single-thread testing versus 3875 for the Ryzen AI 7 345, a delta of just 0.1%. For practical purposes, single-thread performance is effectively tied.

Q: How much faster is the Ryzen 7 8745HX in multi-threaded performance?

A: The 8745HX scores 31517 in PassMark multithread testing, which is 58.2% higher than the AI 7 345's 19927. This large gap reflects the 8-core, 16-thread configuration of the 8745HX versus the 6-core, 12-thread setup of the AI 7 345.

Q: What is the biggest performance difference between the two chips?

A: The largest delta appears in the passmark_find_prime_numbers test. The 8745HX scores 159, while the AI 7 345 scores 62, giving the 8745HX a 156.5% advantage. Data encryption is close behind at 84.9%.

Q: How do the two processors compare in average benchmark scores?

A: The Ryzen 7 8745HX has an average benchmark score of 60104, placing it in the 92nd percentile of all CPUs. The Ryzen AI 7 345 averages 29461, which puts it in the 81st percentile. The 8745HX's average is more than double that of the AI 7 345.

Q: What are the cache differences between the two processors?

A: The 8745HX has 64 KB of L1 per core, 1 MB of L2 per core, and 32 MB of shared L3. The AI 7 345 has 80 KB of L1 per core, 1 MB of L2 per core, and only 4 MB of L3. The 8745HX has substantially more L3 cache.

Q: Do both processors support ECC memory?

A: No. Neither the 8745HX nor the AI 7 345 supports ECC memory. Both support DDR5, but the AI 7 345 adds LPDDR5X support as well, and it has higher memory bandwidth at 89.6 GB/s versus 83.2 GB/s for the 8745HX.

The Verdict

The data points to a clear performance hierarchy. The Ryzen 7 8745HX is the stronger processor for compute-heavy tasks, winning all 11 shared benchmarks with deltas ranging from 0.1% to 156.5%. Its 8-core, 16-thread design, higher clocks, and 32 MB of L3 cache give it decisive advantages in multithreaded workloads, encryption, compression, and math-heavy applications. The 92nd percentile average score confirms its position near the top of the CPU hierarchy, alongside parts like the Ryzen 9 7945HX and Intel Core i9-14900F.

The Ryzen AI 7 345 is the more efficient part, with a 28 W TDP versus 55 W for the 8745HX, and it offers a more modern 4 nm process and hybrid Zen 5 / Zen 5c cores. It also supports LPDDR5X memory and carries a newer integrated GPU, the Radeon 840M. However, its 6-core, 12-thread configuration and 4 MB of L3 cache limit its throughput in heavily threaded scenarios. Its 81st percentile average score places it alongside desktop parts like the Ryzen 7 3800X and mobile parts like the Intel Core i5-13500HX.

For workloads that depend on parallel processing, the 8745HX is the clear choice based on the recorded data. For lightly threaded tasks, the two chips are nearly identical, with only a 0.1% single-thread delta. The AI 7 345 makes sense in systems where power efficiency and the newer integrated graphics matter more than raw multi-core throughput. The 8745HX also offers PCIe Gen 5 with 28 lanes, compared to Gen 4 with 14 lanes on the AI 7 345, which matters for users planning to connect high-bandwidth peripherals. Neither part supports ECC memory, and neither has a launch MSRP listed in the database.

Specification Differences

| Specification | AMD Ryzen 7 8745HX | AMD Ryzen AI 7 345 |

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

| Cores | 8 | 6 |

| Threads | 16 | 12 |

| Base clock | 3.60 GHz | 2.00 GHz |

| Boost clock | 5.10 GHz | 4.60 GHz |

| TDP | 55 W | 28 W |

| Socket | AMD Socket FL1 | AMD Socket FP8 |

| Codename | Dragon Range | Krackan Point |

| Generation | Ryzen 7 (Zen 4 (Dragon Range)) | Ryzen AI 300 (Zen 5 / Zen 5c) |

| Process node | 5 nm | 4 nm |

| Transistors | 6,570 million | Not listed |

| Die size | 71 mm² | Not listed |

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

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

| L3 cache | 32 MB (shared) | 4 MB |

| Memory support | DDR5 | DDR5, LPDDR5X |

| Memory bus | Dual-channel | Dual-channel |

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

| ECC memory | No | No |

| PCIe | Gen 5, 28 Lanes (CPU only) | Gen 4, 14 Lanes (CPU only) |

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

| Multiplier unlocked | Yes | No |

| Part number | 100-000001851 | 100-000002122 |

| Release date | 2025-04-22 | 2025-01-14 |