AMD Ryzen 9 9955HX3D vs AMD Ryzen AI 9 PRO 465 Comparison

Where Each One Wins

The benchmark data splits cleanly between these two mobile processors. The AMD Ryzen 9 9955HX3D wins every recorded head-to-head test, taking 11 of 11 comparisons. The Ryzen AI 9 PRO 465 does not win a single benchmark in the database.

The 9955HX3D dominates in workloads that scale with core count and cache. Its largest advantage comes in prime number computation, where it scores 525 versus 126, a 316.7% lead. Floating-point math shows a 115.7% advantage (144122 versus 66824), while extended instructions sit at 137.6% ahead (62813 versus 26441). Physics simulation favors the 9955HX3D by 168.3% (4687 versus 1747). These are heavily parallel workloads, and the 16-core/32-thread configuration simply overwhelms the 10-core/20-thread part.

The closest contest is single-thread performance. The 9955HX3D scores 4511 in PassMark single-thread testing against 4168 for the AI 9 PRO 465, a modest 8.2% edge. This indicates that per-core efficiency is similar between the two Zen 5 designs, and the gap widens only when additional cores and cache come into play.

For data compression, the 9955HX3D records 785811 versus 385174, a 104% advantage. Encryption shows a 104.3% edge (39446 versus 19308). Random string sorting follows the same pattern at 104.3% (83497 versus 40860). Integer math delivers a 107.6% lead (222503 versus 107173). The multithread score, 62674 versus 31485, reflects a 99.1% difference, essentially double the throughput.

The overall average benchmark score reinforces this hierarchy. The 9955HX3D posts an average of 97453 across all recorded tests, placing it in the 96th percentile of all CPUs in the database. The AI 9 PRO 465 averages 62498, good for the 93rd percentile. Both are high-percentile parts, but the performance class separation is clear.

Architecture Differences

Both processors use the Zen 5 architecture on TSMC's 4 nm process node. The similarities end there. The 9955HX3D carries the codename Fire Range and belongs to the 9000 series, while the AI 9 PRO 465 uses the Gorgon Point codename and the Ryzen AI PRO 400 generation designation.

The 9955HX3D integrates 16,630 million transistors across a dual-die design with two 70.6 mm² chiplets. The AI 9 PRO 465 uses a single 233 mm² monolithic die; the database lists no transistor count for this part. This physical difference explains much of the performance gap.

Cache configuration diverges sharply. The 9955HX3D provides 80 KB of L1 per core, 1 MB of L2 per core, and 128 MB of L3 cache. The AI 9 PRO 465 matches the per-core L1 and L2 figures but offers only 16 MB of L3. That 112 MB difference in last-level cache is the single largest architectural separator between the two, and it directly benefits the 9955HX3D in cache-sensitive workloads like compression and sorting.

The 9955HX3D runs at a 2.50 GHz base clock and 5.40 GHz boost clock within a 55 W TDP. The AI 9 PRO 465 starts lower at 2.00 GHz base, boosts to 5.00 GHz, and operates at a 28 W TDP. The unlocked multiplier on the 9955HX3D allows overclocking, while the AI 9 PRO 465 is locked.

Memory support also differs. Both use dual-channel DDR5 with 89.6 GB/s bandwidth, but the AI 9 PRO 465 adds LPDDR5X support. ECC memory is available on the 9955HX3D but not on the AI 9 PRO 465.

PCIe connectivity sets them apart. The 9955HX3D provides Gen 5 with 28 CPU lanes, while the AI 9 PRO 465 offers Gen 4 with 16 CPU lanes. Integrated graphics differ as well: the 9955HX3D uses a Radeon 610M, while the AI 9 PRO 465 steps up to a Radeon 890M.

Head-to-Head Benchmarks

The largest single win for the 9955HX3D is in PassMark's find prime numbers test. A score of 525 against 126 yields a 316.7% delta, the most lopsided result in the entire comparison. This test stresses integer throughput and cache residency, both areas where the 128 MB L3 and 16 cores provide massive headroom.

Physics simulation shows the second-largest gap at 168.3% (4687 versus 1747). Extended instructions follow at 137.6% (62813 versus 26441). Floating-point math records 144122 versus 66824, a 115.7% lead. Integer math sits at 107.6% (222503 versus 107173).

The three memory-bandwidth-sensitive tests cluster around a 104% delta. Data compression scores 785811 versus 385174. Data encryption hits 39446 versus 19308. Random string sorting finishes 83497 versus 40860. All three land within a fraction of a percent of each other, suggesting the same underlying resource limits drive these results.

Multithread performance shows a 99.1% delta (62674 versus 31485), just under double. The single-thread tests are the only ones that stay close, with both the passmark_single_thread and passmark_singlethread entries recording 4511 versus 4168, an 8.2% difference.

The nearest rival data places both chips in context. The 9955HX3D sits 1.1% below the AMD Ryzen Threadripper PRO 5965WX in average score, 1.4% above the AMD Ryzen 9 PRO 9945, 1.8% above the AMD EPYC 4565P, and 1.9% above the AMD EPYC 9175F. The AI 9 PRO 465 trails the Intel Core Ultra 7 255HX by 0.4%, sits 0.5% below the AMD Ryzen AI Embedded P185, 0.9% below the Intel Core i7-13790F, and leads the Intel Core i9-13900KF by 1.1%. These deltas show that each chip competes in a different performance stratum despite both using Zen 5.

Specification Differences

| Specification | AMD Ryzen 9 9955HX3D | AMD Ryzen AI 9 PRO 465 |

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

| Cores | 16 | 10 |

| Threads | 32 | 20 |

| Base clock | 2.50 GHz | 2.00 GHz |

| Boost clock | 5.40 GHz | 5.00 GHz |

| TDP | 55 W | 28 W |

| Socket | AMD Socket FL1 | AMD Socket FP8 |

| Codename | Fire Range | Gorgon Point |

| Generation | Ryzen 9 (Zen 5 (Fire Range)) | Ryzen AI PRO 400 (Zen 5 / Zen 5c) |

| Transistors | 16,630 million | Not listed |

| Die size | 2x 70.6 mm² | 233 mm² |

| L3 cache | 128 MB | 16 MB |

| Memory support | DDR5 | DDR5, LPDDR5X |

| ECC memory | Yes | No |

| PCIe | Gen 5, 28 lanes | Gen 4, 16 lanes |

| Integrated graphics | Radeon 610M | Radeon 890M |

| Multiplier | Unlocked | Locked |

| Part number | 100-000001030 | 100-000001862 |

The release dates differ by roughly one year. The 9955HX3D launched on 2025-01-05, while the AI 9 PRO 465 is dated 2026-01-04. Both share the same process node, foundry, L1 cache per core, L2 cache per core, memory bus width, memory bandwidth, and market segment.

FAQ

Q: Which processor has more cores?

A: The AMD Ryzen 9 9955HX3D has 16 cores and 32 threads. The AMD Ryzen AI 9 PRO 465 has 10 cores and 20 threads.

Q: How much L3 cache does each processor have?

A: The 9955HX3D has 128 MB of L3 cache. The AI 9 PRO 465 has 16 MB of L3 cache, a difference of 112 MB.

Q: Which chip wins in single-thread performance?

A: The 9955HX3D leads with a PassMark single-thread score of 4511 versus 4168, an 8.2% advantage. Both use the Zen 5 architecture, so per-core efficiency is close.

Q: Do both processors support ECC memory?

A: No. The 9955HX3D supports ECC memory, while the AI 9 PRO 465 does not.

Q: What are the TDP ratings for these chips?

A: The 9955HX3D is rated at 55 W. The AI 9 PRO 465 is rated at 28 W, which indicates a lower sustained power envelope.

Q: Which processor has the higher boost clock?

A: The 9955HX3D boosts to 5.40 GHz. The AI 9 PRO 465 boosts to 5.00 GHz.

Q: How do the integrated graphics compare?

A: The 9955HX3D uses a Radeon 610M. The AI 9 PRO 465 uses a Radeon 890M, which is the higher-tier integrated solution of the two.

The Verdict

The AMD Ryzen 9 9955HX3D is the clear performance leader in every recorded benchmark. It wins all 11 head-to-head tests, holds a 96th percentile ranking, and posts an average benchmark score of 97453. The 128 MB L3 cache, 16 cores, 32 threads, and 55 W TDP combine to deliver roughly double the multithread throughput of the smaller part.

The AMD Ryzen AI 9 PRO 465 is a different class of mobile processor. Its 93rd percentile ranking and 62498 average score place it among capable mainstream parts, and its nearest rivals include the Intel Core Ultra 7 255HX and Intel Core i9-13900KF, both within about 1% of its average score. The 28 W TDP and 16 MB L3 cache suit efficiency-focused designs, and the Radeon 890M integrated graphics plus LPDDR5X memory support give it advantages the 9955HX3D lacks.

The data indicates that the 9955HX3D targets heavy multithreaded workloads, large datasets, and cache-intensive tasks where its 128 MB L3 and 16-core layout produce leads from 99.1% to 316.7%. The AI 9 PRO 465 targets compact, power-conscious systems where its 8.2% single-thread deficit is acceptable and its lower TDP and integrated graphics matter more.

Buyers who need maximum mobile compute throughput should select the 9955HX3D. Buyers who prioritize power efficiency, LPDDR5X memory, and a stronger integrated GPU should consider the AI 9 PRO 465, accepting the substantial multithread trade-off.