AMD Ryzen 7 8840HX vs Intel Core Ultra X7 358H Comparison

Head-to-Head Benchmarks

The benchmark data splits this comparison into two distinct profiles. The AMD Ryzen 7 8840HX wins 7 of the 13 recorded head-to-head tests, while the Intel Core Ultra X7 358H takes 6. The margins, however, are not symmetric.

The largest win for the AMD part comes in PassMark integer math, where it scores 146506 against 83147 for Intel. That is a 76.2% advantage, the widest gap in the entire comparison. Data compression also favors AMD heavily: 496427 versus 332508, a 49.3% lead. Random string sorting shows a 43.6% margin (57971 versus 40357), and extended instructions land at 33.9% (36527 versus 27274). In Cinebench R23 multi-core, the AMD chip posts 25265 against 18747, a 34.8% advantage. PassMark multi-thread follows with 41732 versus 33802, a 23.5% lead, and data encryption shows a more modest 14.9% edge (29919 versus 26046).

The Intel processor answers in single-threaded and floating-point workloads. Its Cinebench R23 single-core score is 2080 versus 1857, a 10.7% margin. PassMark single-thread shows 4124 versus 3958, a 4% lead. The most striking Intel win is PassMark physics, where it scores 3021 against 2185, a 27.7% advantage. Floating-point math also goes to Intel: 103842 versus 86747, a 16.5% margin. Prime number finding favors Intel by 9.8% (337 versus 304).

Overall average benchmark scores reflect these splits. The AMD processor records an average benchmark score of 71797, which places it at the 94th percentile of all CPUs in the database. The Intel part averages 40967, sitting at the 87th percentile. The AMD chip's nearest rivals in the database, the Intel Core Ultra 7 265KF at 71910 (0.2% lower) and the Intel Xeon 6724P at 72396 (0.8% lower), confirm that its aggregate performance sits in a higher tier. The Intel chip's nearest rivals, the AMD Ryzen AI 5 PRO 440 at 41208 and the Intel Core Ultra 7 356H at 41215, both sit within 0.6% of its average score.

Where Each One Wins

The data indicates that the AMD Ryzen 7 8840HX dominates workloads that scale with thread count and shared cache. Its 24 threads, compared to 16 for the Intel part, allow it to sustain large advantages in integer-heavy and compression-oriented tasks. The 76.2% integer math margin and the 49.3% compression margin are the clearest signals: this processor is built for parallel throughput. The 34.8% Cinebench R23 multi-core lead reinforces that profile. Encryption, which often benefits from both parallelism and dedicated instruction paths, also favors AMD at 14.9%.

The Intel Core Ultra X7 358H wins where per-core efficiency and single-thread responsiveness matter. Its Cinebench R23 single-core score of 2080 versus 1857 shows that its individual cores are faster despite the lower boost clock of 4.80 GHz versus 5.10 GHz. The physics test result, 3021 versus 2185, is particularly notable because physics simulations often depend on a mix of single-thread latency and moderate parallelism. Floating-point math at 103842 versus 86747 indicates that Intel's architecture handles FP-heavy code more effectively, even while losing integer workloads by a wide margin. Prime number finding, a classic single-thread-limited test, also goes to Intel.

The pattern is consistent: AMD wins throughput-heavy, multi-threaded, integer, and data-movement tasks. Intel wins single-thread, floating-point, physics, and prime-number workloads. The PassMark multi-thread result (41732 versus 33802) and the PassMark single-thread result (4124 versus 3958) both align with this split. The AMD processor's average benchmark score of 71797 versus 40967 for Intel reflects the fact that multi-threaded tests carry more weight in the aggregate scoring.

Architecture Differences

The two processors come from different design philosophies. The AMD Ryzen 7 8840HX uses the Zen 4 architecture under the Dragon Range codename, built on a 5 nm process at TSMC. It packages 12 cores and 24 threads, with a base clock of 2.90 GHz and a boost clock of 5.10 GHz. The Intel Core Ultra X7 358H uses the Panther Lake codename, built on a 3 nm process at Intel, with 16 cores and 16 threads, a base clock of 1.90 GHz and a boost clock of 4.80 GHz. Intel's chip has more physical cores but no hyperthreading, which explains why 16 threads match 16 cores.

Cache layouts differ substantially. AMD provides 64 KB of L1 per core, 1 MB of L2 per core, and 64 MB of shared L3. Intel provides 192 KB of L1 per core, 3 MB of L2 per core, but only 18 MB of shared L3. The much larger shared L3 on the AMD part, 64 MB versus 18 MB, likely contributes to its compression and random string sorting advantages, since those workloads benefit from keeping large working sets in fast memory.

Memory bandwidth also favors Intel. The AMD chip supports DDR5 with a dual-channel bus and 83.2 GB/s of bandwidth. The Intel chip supports LPDDR5X with a dual-channel bus and 153.6 GB/s, nearly double the AMD figure. This bandwidth advantage may explain Intel's stronger floating-point math score, since FP workloads often stream large arrays. The Intel part also integrates an Arc B390 GPU, while AMD uses a Radeon 610M.

PCIe lane counts differ by a wide margin. AMD offers Gen 5 with 28 lanes (CPU only), while Intel offers Gen 5 with only 4 lanes (CPU only). Socket types differ as well: AMD uses Socket FL1, Intel uses BGA 2540. The AMD processor has an unlocked multiplier; the Intel part does not. The production status for both is Active.

The process node difference, 5 nm for AMD versus 3 nm for Intel, combined with the TDP gap (55 W for AMD versus 25 W for Intel), indicates that Intel is targeting a lower power envelope. The AMD part's 55 W TDP is more than double Intel's 25 W, which aligns with its higher boost clock and larger thread count.

FAQ

Q: Which processor has a higher multi-core score?

A: The AMD Ryzen 7 8840HX scores 25265 in Cinebench R23 multi-core, which is 34.8% higher than the Intel Core Ultra X7 358H's 18747.

Q: Does the Intel processor win any benchmark categories?

A: Yes. Intel wins Cinebench R23 single-core (2080 versus 1857), PassMark single-thread (4124 versus 3958), PassMark physics (3021 versus 2185), PassMark floating-point math (103842 versus 86747), and PassMark find prime numbers (337 versus 304).

Q: How do the core and thread counts compare?

A: The Intel Core Ultra X7 358H has 16 cores and 16 threads, while the AMD Ryzen 7 8840HX has 12 cores and 24 threads. The AMD chip uses simultaneous multithreading, while the Intel chip does not.

Q: What is the memory bandwidth difference?

A: The Intel chip supports LPDDR5X with 153.6 GB/s bandwidth. The AMD chip supports DDR5 with 83.2 GB/s bandwidth. Both use dual-channel memory buses.

Q: Which processor has a larger shared cache?

A: The AMD Ryzen 7 8840HX has 64 MB of shared L3 cache, compared to 18 MB on the Intel Core Ultra X7 358H.

Q: How do the TDP ratings compare?

A: The AMD chip has a TDP of 55 W, while the Intel chip has a TDP of 25 W.

Q: Which processor ranks higher in the database overall?

A: The AMD Ryzen 7 8840HX sits at the 94th percentile of all CPUs with an average benchmark score of 71797. The Intel Core Ultra X7 358H sits at the 87th percentile with an average benchmark score of 40967.

Specification Differences

| Specification | AMD Ryzen 7 8840HX | Intel Core Ultra X7 358H |

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

| Cores | 12 | 16 |

| Threads | 24 | 16 |

| Base clock | 2.90 GHz | 1.90 GHz |

| Boost clock | 5.10 GHz | 4.80 GHz |

| TDP | 55 W | 25 W |

| Socket | AMD Socket FL1 | Intel BGA 2540 |

| Codename | Dragon Range | Panther Lake |

| Process node | 5 nm (TSMC) | 3 nm (Intel) |

| L1 cache | 64 KB per core | 192 KB per core |

| L2 cache | 1 MB per core | 3 MB per core |

| L3 cache | 64 MB shared | 18 MB shared |

| Memory support | DDR5 | LPDDR5X |

| Memory bandwidth | 83.2 GB/s | 153.6 GB/s |

| PCIe | Gen 5, 28 lanes (CPU only) | Gen 5, 4 lanes (CPU only) |

| Integrated graphics | Radeon 610M | Arc B390 |

| Multiplier unlocked | Yes | No |

| Part number | 100-000001850 | SA4RAQ9ET |