AMD Ryzen AI 9 HX 370 vs AMD Ryzen Threadripper PRO 9955WX Comparison

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD Ryzen Threadripper PRO 9955WX records an average benchmark score of 101041, while the AMD Ryzen AI 9 HX 370 records 37904. The Threadripper PRO sits in the 97th percentile of all CPUs, compared to the 86th percentile for the mobile chip.

Q: How do the two compare on single-thread performance?

A: The Threadripper PRO 9955WX wins the PassMark single-thread test with 4530 against 3973, a 12.3% advantage. The gap widens in Cinebench R23 single-core, where the Threadripper PRO scores 8399 versus 2018, a 76% lead.

Q: What memory configurations do they support?

A: The Ryzen AI 9 HX 370 uses dual-channel memory with DDR5 and LPDDR5X support and 89.6 GB/s bandwidth. The Threadripper PRO 9955WX uses eight-channel DDR5 with 409.6 GB/s bandwidth and supports ECC memory, which the mobile chip does not.

Q: Which processor has more cores and threads?

A: The Threadripper PRO 9955WX has 16 cores and 32 threads. The Ryzen AI 9 HX 370 has 12 cores and 24 threads. Both use the Zen 5 architecture on a 4 nm TSMC process.

Q: What are the TDP ratings?

A: The Ryzen AI 9 HX 370 has a 28 watt TDP, while the Threadripper PRO 9955WX has a 350 watt TDP. The mobile chip is designed for the FP8 socket, and the desktop chip uses the sTR5 socket.

Q: Do both processors have integrated graphics?

A: No. The Ryzen AI 9 HX 370 includes Radeon 890M integrated graphics. The Threadripper PRO 9955WX has no integrated graphics, listed as N/A.

Architecture Differences

The two processors share the Zen 5 architecture and 4 nm TSMC fabrication, but their implementations diverge sharply. The Ryzen AI 9 HX 370 uses the Strix Point codename and belongs to the Ryzen AI 300 generation, which combines Zen 5 and Zen 5c core types. The Threadripper PRO 9955WX uses the Shimada Peak codename and sits in the 9000 series, though its generation field references Zen 4 (Storm Peak) as the broader Threadripper family lineage.

Core counts establish the first major split. The AI 9 HX 370 provides 12 cores and 24 threads, while the Threadripper PRO 9955WX provides 16 cores and 32 threads. That 4 core and 8 thread difference translates directly into scalable multithreaded workloads, but the architectural gap runs deeper than raw counts.

Cache hierarchies differ substantially. The AI 9 HX 370 has 80 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. The Threadripper PRO 9955WX has 64 KB of L1 per core, 1 MB of L2 per core, and 64 MB of L3. The quad-capacity L3 cache on the Threadripper PRO gives it a significant edge for data sets that exceed the mobile chip's cache footprint.

Die configuration also separates them. The AI 9 HX 370 uses a single 233 mm² die. The Threadripper PRO 9955WX uses a dual-die arrangement with 2x 70.6 mm², totaling 16,630 million transistors. The smaller individual dies with a larger aggregate cache point to a chiplet-based design optimized for workstation throughput rather than mobile power efficiency.

PCIe connectivity marks another architectural fork. The AI 9 HX 370 provides Gen 4 with 16 CPU lanes. The Threadripper PRO 9955WX provides Gen 5 with 128 CPU lanes. That 8x lane count increase and two-generation jump in PCIe standard makes the desktop part fundamentally more expandable for multi-GPU and high-bandwidth I/O configurations.

Memory architecture follows the same pattern. The AI 9 HX 370 runs dual-channel with 89.6 GB/s bandwidth. The Threadripper PRO 9955WX runs eight-channel with 409.6 GB/s, over 4.5x the bandwidth. ECC support appears only on the Threadripper PRO, which matters for error-sensitive compute environments.

Clock behavior shows a smaller difference than the core and cache gaps. The AI 9 HX 370 has a 2.00 GHz base and 5.10 GHz boost. The Threadripper PRO 9955WX has a 4.50 GHz base and 5.40 GHz boost. Higher base clocks on the desktop chip suggest sustained all-core performance, while the mobile chip relies on boost states within a 28 watt envelope.

Where Each One Wins

The Ryzen AI 9 HX 370 wins in the mobile segment by definition. It is a 28 watt part with Radeon 890M integrated graphics, designed for the FP8 socket. Its memory flexibility with both DDR5 and LPDDR5X support, combined with a 233 mm² single die, suits compact systems where power and space are constrained. The 86th percentile standing among all CPUs shows it holds its own against desktop parts despite the power budget.

The Threadripper PRO 9955WX wins every benchmark category recorded in the head-to-head comparison. Its 97th percentile ranking places it among the top processors in the database, and its nearest rivals are server-class EPYC parts. The 16 core, 32 thread configuration with 64 MB L3 and eight-channel memory positions it for heavy parallel workloads: rendering, scientific computing, large-scale compilation, and data processing.

The benchmark data shows no scenario where the AI 9 HX 370 outperforms the Threadripper PRO 9955WX. Even in single-thread tests, where the mobile chip's high boost clock might narrow the gap, the Threadripper PRO maintains a 12.3% lead in PassMark single-thread and a 76% lead in Cinebench R23 single-core. The desktop chip's higher base clock and larger thermal headroom allow it to sustain higher frequencies.

The AI 9 HX 370 offers integrated graphics and a 28 watt TDP, which the Threadripper PRO cannot match. For systems that need a CPU with built-in display output and minimal power draw, the mobile chip is the only viable choice between these two. For raw compute throughput, the Threadripper PRO dominates across every measured workload.

Specification Differences

| Specification | AMD Ryzen AI 9 HX 370 | AMD Ryzen Threadripper PRO 9955WX |

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

| Cores | 12 | 16 |

| Threads | 24 | 32 |

| Base clock | 2.00 GHz | 4.50 GHz |

| Boost clock | 5.10 GHz | 5.40 GHz |

| TDP | 28 W | 350 W |

| Socket | AMD Socket FP8 | AMD Socket sTR5 |

| Codename | Strix Point | Shimada Peak |

| Process node | 4 nm | 4 nm |

| Die size | 233 mm² | 2x 70.6 mm² |

| Transistors | Not listed | 16,630 million |

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

| L3 cache | 16 MB | 64 MB |

| Memory support | DDR5, LPDDR5X | DDR5 |

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

| Memory bandwidth | 89.6 GB/s | 409.6 GB/s |

| ECC memory | False | True |

| PCIe | Gen 4, 16 lanes | Gen 5, 128 lanes |

| Integrated graphics | Radeon 890M | N/A |

| Multiplier unlocked | False | True |

| Launch MSRP | Not listed | $1649 |

The specification table reveals complementary strengths. The AI 9 HX 370 has larger L1 per core and supports both DDR5 and LPDDR5X, indicating optimization for latency-sensitive mobile tasks. The Threadripper PRO 9955WX has 4x the L3, 4.5x the memory bandwidth, 8x the PCIe lanes, and full ECC support. The unlocked multiplier on the Threadripper PRO allows overclocking, while the AI 9 HX 370 remains locked.

Head-to-Head Benchmarks

The Threadripper PRO 9955WX wins all 15 recorded head-to-head benchmarks. The largest margin appears in Cinebench R23 single-core, where the desktop chip scores 8399 against 2018, a 76% delta. This result is striking because single-core performance typically scales less with core count and power budget. The 4.50 GHz base clock and 5.40 GHz boost on the Threadripper PRO, combined with higher sustained frequency capability, explain the gap.

Cinebench R23 multi-core shows a 63.4% lead for the Threadripper PRO: 59494 versus 21761. The 16 core count against 12, plus the 64 MB L3 cache, drives this result. Cinebench R15 multi-core shows a narrower 43.1% delta (5996 versus 3409.5), while R15 single-core shows a 63.8% delta (846 versus 306.5). The R23 single-core delta of 76% is the largest of any test.

PassMark integer math shows 236120 versus 122933, a 47.9% lead. Floating-point math shows 156215 versus 76892, a 50.8% lead. Extended instructions show 76363 versus 31653, a 58.5% lead. Data compression shows 920954 versus 445719, a 51.6% lead. Data encryption shows 44389 versus 22252, a 49.9% lead. Prime number finding shows 337 versus 126, a 62.6% lead. Random string sorting shows 99813 versus 48723, a 51.2% lead. Physics shows 4156 versus 1881, a 54.7% lead. PassMark multithread shows 67035 versus 35148, a 47.6% lead.

The smallest margin is PassMark single-thread at 12.3%, where the Threadripper PRO scores 4530 against 3973. This test appears twice in the data with identical results. Even in this closest comparison, the desktop chip maintains a clear advantage.

The pattern across all benchmarks shows consistent superiority for the Threadripper PRO, with margins ranging from 12.3% to 76%. The AI 9 HX 370's average benchmark score of 37904 places it near the Intel Core i9-14901E (37911, 0% delta) and AMD Ryzen 7 9700X (37943, -0.1% delta). The Threadripper PRO's average of 101041 places it near the AMD EPYC 7513 (102244, -1.2% delta) and AMD EPYC 8324P (103329, -2.2% delta). These rival positions confirm the two CPUs occupy different performance strata entirely.

The Verdict

The data supports a clear performance hierarchy. The AMD Ryzen Threadripper PRO 9955WX outperforms the AMD Ryzen AI 9 HX 370 in every recorded benchmark, with margins from 12.3% in single-thread to 76% in Cinebench R23 single-core. Its 97th percentile ranking versus 86th for the mobile chip, and its average score of 101041 versus 37904, place it in a different performance class.

The Ryzen AI 9 HX 370 serves systems where the 28 watt TDP, integrated Radeon 890M graphics, and FP8 socket compatibility are priorities. It offers 12 cores, 24 threads, dual-channel memory with LPDDR5X support, and a 5.10 GHz boost clock in a mobile form factor. Its 86th percentile standing shows it competes well against mainstream desktop CPUs despite its power constraints.

The Threadripper PRO 9955WX targets workstation and server-class workloads that demand 16 cores, 32 threads, 64 MB L3, eight-channel memory at 409.6 GB/s, and 128 PCIe Gen 5 lanes. Its 350 watt TDP and sTR5 socket require a substantially larger platform. ECC memory support and an unlocked multiplier add functionality for enterprise and overclocking use cases.

The choice depends on platform requirements, not performance preference. Systems needing integrated graphics, low power draw, and mobile deployment should use the Ryzen AI 9 HX 370. Systems needing maximum multithreaded throughput, high memory bandwidth, and extensive PCIe expansion should use the Threadripper PRO 9955WX. The benchmark data shows no overlap in their performance envelopes, and no workload category where the mobile chip closes the gap.