AMD Ryzen 9 9955HX3D vs AMD Ryzen AI 5 PRO 440 Comparison

Head-to-Head Benchmarks

The benchmark comparison between the AMD Ryzen 9 9955HX3D and the AMD Ryzen AI 5 PRO 440 is a study in scale. The Ryzen 9 9955HX3D wins all 11 recorded head-to-head benchmarks, with the smallest margin appearing in single-threaded workloads and the largest in prime number finding. In the PassMark single-thread test, the Ryzen 9 scores 4511 against 3785 for the Ryzen AI 5 PRO 440, a 19.2% advantage. That gap widens dramatically when all cores are engaged.

The multithreaded PassMark score shows the Ryzen 9 at 62674 versus 21054 for the Ryzen AI 5 PRO 440, a 197.7% delta. This pattern repeats across every compute-heavy workload. Floating point math delivers 144122 for the Ryzen 9 against 42934, a 235.7% lead. Integer math follows closely: 222503 versus 65991, a 237.2% delta. Data encryption shows the Ryzen 9 at 39446 versus 12418, a 217.7% advantage, while data compression reaches 785811 versus 256420, a 206.5% delta.

The extended instructions test, which measures SIMD and vector processing, gives the Ryzen 9 a 240.3% lead with 62813 points against 18456. Physics simulation is another strong differentiator: 4687 versus 1119, a 318.9% delta. Random string sorting shows 83497 versus 27252, a 206.4% gap. The largest single delta appears in the find prime numbers test, where the Ryzen 9 scores 525 against just 77, a 581.8% advantage.

These results indicate that the Ryzen 9 9955HX3D is not merely faster; it is multiple times faster in nearly every category. The only area where the Ryzen AI 5 PRO 440 remains competitive is single-threaded performance, where the 19.2% gap is modest compared to the multi-hundred percent differences elsewhere. The data suggests that the Ryzen 9's advantage scales with core count and cache utilization, rather than raw clock speed alone.

Architecture Differences

Both processors use the Zen 5 architecture and are built on TSMC's 4 nm process node. The similarities end there. The Ryzen 9 9955HX3D carries the Fire Range codename and belongs to the Ryzen 9 (Zen 5) generation, while the Ryzen AI 5 PRO 440 uses the Gorgon Point codename and belongs to the Ryzen AI PRO 400 (Zen 5 / Zen 5c) generation. The Ryzen 9 packs 16 cores and 32 threads, while the Ryzen AI 5 PRO 440 offers 6 cores and 12 threads. This 10-core difference explains much of the multithreaded performance gap.

Cache configuration is another major divider. The Ryzen 9 9955HX3D includes 128 MB of L3 cache, while the Ryzen AI 5 PRO 440 has only 8 MB. Both share the same per-core L1 (80 KB) and L2 (1 MB) allocations, but the enormous L3 difference likely contributes to the Ryzen 9's dominance in data-heavy workloads like compression and encryption. The Ryzen 9's die is composed of two chiplets at 2x 70.6 mm², while the Ryzen AI 5 PRO 440 uses a monolithic 195 mm² die. The Ryzen 9 contains 16,630 million transistors; the database does not record a transistor count for the Ryzen AI 5 PRO 440.

Clock speeds differ as well. The Ryzen 9 has a base clock of 2.50 GHz and a boost clock of 5.40 GHz, while the Ryzen AI 5 PRO 440 operates at 2.00 GHz base and 4.80 GHz boost. The Ryzen 9's higher boost clock helps explain its single-thread advantage, though the gap is smaller than the core-count delta would suggest. Thermal design power also separates the two: the Ryzen 9 is rated at 55 W, the Ryzen AI 5 PRO 440 at 28 W. The Ryzen 9 uses AMD Socket FL1, while the Ryzen AI 5 PRO 440 uses AMD Socket FP8.

The Ryzen 9 supports PCIe Gen 5 with 28 lanes (CPU only), whereas the Ryzen AI 5 PRO 440 uses PCIe Gen 4 with 16 lanes (CPU only). The integrated graphics differ too: the Ryzen 9 includes a Radeon 610M, while the Ryzen AI 5 PRO 440 has a Radeon 840M. Both support DDR5 memory in dual-channel configuration with 89.6 GB/s bandwidth, and both support ECC memory. The Ryzen 9 has an unlocked multiplier; the Ryzen AI 5 PRO 440 does not.

Where Each One Wins

The Ryzen 9 9955HX3D wins every benchmark category recorded in the database, but the magnitude of its wins varies by workload type. The smallest margin is in single-threaded performance, where the Ryzen 9 leads by 19.2%. This suggests that for lightly threaded applications, such as basic office tasks, web browsing, or legacy software that uses one core, the Ryzen 9 is faster but not overwhelmingly so. The Ryzen AI 5 PRO 440's single-thread score of 3785 still places it in the 87th percentile of all CPUs, indicating respectable performance for everyday use.

The Ryzen 9's largest wins appear in workloads that stress parallel execution and memory bandwidth. The find prime numbers test, with a 581.8% delta, is a purely computational workload that scales with core count and clock speed. Physics simulation (318.9% delta) and floating-point math (235.7% delta) similarly benefit from the Ryzen 9's 16 cores and higher boost clock. Data encryption (217.7% delta) and compression (206.5% delta) likely benefit from the Ryzen 9's 128 MB L3 cache, which reduces memory latency for large datasets.

For users running multi-threaded rendering, compilation, scientific simulation, or heavy data processing, the Ryzen 9 9955HX3D is clearly the superior choice. The Ryzen AI 5 PRO 440, with its 6 cores and 8 MB L3 cache, appears better suited for mobile workloads where power efficiency matters. Its 28 W TDP is roughly half the Ryzen 9's 55 W rating, and its smaller physical footprint (195 mm² monolithic die versus 2x 70.6 mm² chiplets) suggests a more integrated design. The Ryzen AI 5 PRO 440 also supports LPDDR5X memory in addition to DDR5, which could benefit thin-and-light systems.

The Verdict

The recorded data presents a clear hierarchy. The AMD Ryzen 9 9955HX3D is the dominant processor in every measured category, with an average benchmark score of 97453 compared to 41208 for the Ryzen AI 5 PRO 440. The Ryzen 9 sits in the 96th percentile of all CPUs, while the Ryzen AI 5 PRO 440 sits in the 87th percentile. The Ryzen 9's nearest rivals include the AMD Ryzen Threadripper PRO 5965WX (average score 98504, delta -1.1%), the AMD Ryzen 9 PRO 9945 (96083, +1.4%), the AMD EPYC 4565P (95764, +1.8%), and the AMD EPYC 9175F (95615, +1.9%). This places the Ryzen 9 in workstation-class territory.

The Ryzen AI 5 PRO 440's nearest rivals are entirely different: the Intel Core Ultra 7 356H (average score 41215, delta 0%), the Intel Core Ultra 7 366H (41263, -0.1%), the AMD Ryzen 9 5900X (41376, -0.4%), and the Intel Core Ultra X7 358H (40967, +0.6%). These comparisons show that the Ryzen AI 5 PRO 440 competes with mid-range desktop processors from previous generations, not with flagship mobile parts.

The choice between these two processors depends entirely on the intended workload. The Ryzen 9 9955HX3D is for users who need maximum multi-threaded throughput and are willing to accept a 55 W TDP. The Ryzen AI 5 PRO 440 is for users who prioritize portability and power efficiency, with its 28 W TDP and support for LPDDR5X memory. The data does not indicate any scenario where the Ryzen AI 5 PRO 440 outperforms the Ryzen 9 in raw performance, but its lower power envelope and smaller footprint make it a viable option for compact mobile systems.

FAQ

Q: Which processor has more cores?

A: The AMD Ryzen 9 9955HX3D has 16 cores and 32 threads, while the AMD Ryzen AI 5 PRO 440 has 6 cores and 12 threads.

Q: How much L3 cache does each processor have?

A: The Ryzen 9 9955HX3D has 128 MB of L3 cache, while the Ryzen AI 5 PRO 440 has 8 MB.

Q: What is the single-threaded performance difference?

A: In the PassMark single-thread test, the Ryzen 9 scores 4511 against 3785 for the Ryzen AI 5 PRO 440, a 19.2% advantage.

Q: Which processor has a higher boost clock?

A: The Ryzen 9 9955HX3D boosts to 5.40 GHz, while the Ryzen AI 5 PRO 440 boosts to 4.80 GHz.

Q: Do both processors support ECC memory?

A: Yes, both the Ryzen 9 9955HX3D and the Ryzen AI 5 PRO 440 support ECC memory.

Q: What PCIe generation does each processor support?

A: The Ryzen 9 9955HX3D supports PCIe Gen 5 with 28 lanes, while the Ryzen AI 5 PRO 440 supports PCIe Gen 4 with 16 lanes.

Specification Differences

The two processors differ in the following recorded specifications:

• Cores: Ryzen 9 9955HX3D has 16, Ryzen AI 5 PRO 440 has 6
• Threads: Ryzen 9 9955HX3D has 32, Ryzen AI 5 PRO 440 has 12
• Base clock: Ryzen 9 9955HX3D at 2.50 GHz, Ryzen AI 5 PRO 440 at 2.00 GHz
• Boost clock: Ryzen 9 9955HX3D at 5.40 GHz, Ryzen AI 5 PRO 440 at 4.80 GHz
• TDP: Ryzen 9 9955HX3D at 55 W, Ryzen AI 5 PRO 440 at 28 W
• Socket: Ryzen 9 9955HX3D uses AMD Socket FL1, Ryzen AI 5 PRO 440 uses AMD Socket FP8
• Codename: Ryzen 9 9955HX3D is Fire Range, Ryzen AI 5 PRO 440 is Gorgon Point
• Generation: Ryzen 9 9955HX3D is Ryzen 9 (Zen 5), Ryzen AI 5 PRO 440 is Ryzen AI PRO 400 (Zen 5 / Zen 5c)
• Die size: Ryzen 9 9955HX3D at 2x 70.6 mm², Ryzen AI 5 PRO 440 at 195 mm²
• Transistors: Ryzen 9 9955HX3D at 16,630 million, Ryzen AI 5 PRO 440 not recorded
• L3 cache: Ryzen 9 9955HX3D at 128 MB, Ryzen AI 5 PRO 440 at 8 MB
• Memory support: Ryzen 9 9955HX3D supports DDR5, Ryzen AI 5 PRO 440 supports DDR5 and LPDDR5X
• PCIe: Ryzen 9 9955HX3D at Gen 5, 28 lanes, Ryzen AI 5 PRO 440 at Gen 4, 16 lanes
• Integrated graphics: Ryzen 9 9955HX3D has Radeon 610M, Ryzen AI 5 PRO 440 has Radeon 840M
• Multiplier: Ryzen 9 9955HX3D is unlocked, Ryzen AI 5 PRO 440 is locked
• Release date: Ryzen 9 9955HX3D on 2025-01-05, Ryzen AI 5 PRO 440 on 2026-01-04
• Part number: Ryzen 9 9955HX3D is 100-000001030, Ryzen AI 5 PRO 440 is 100-000001866