AMD Ryzen 9 8945HX vs AMD Ryzen AI Embedded P185 Comparison

Head-to-Head Benchmarks

The benchmark data presents a distinctly one-sided contest in raw throughput, with the AMD Ryzen 9 8945HX winning 9 of the 11 recorded comparisons, while the AMD Ryzen AI Embedded P185 secures the two single-threaded victories. The most decisive margin comes in data encryption, where the 8945HX scores 40,836 against 19,612 for the P185, a lead of 108.2 percent. That result indicates the 8945HX handles cryptographic workloads with roughly double the efficiency, a significant gap for any application relying on secure data processing.

The data compression test shows a similarly lopsided outcome: 677,755 for the 8945HX versus 374,429 for the P185, an 81 percent advantage. This pattern continues across the compute-heavy PassMark workloads. In extended instructions, the 8945HX posts 49,823 compared to 26,544, a 87.7 percent edge. Integer math follows with 195,180 versus 117,832, a 65.6 percent differential, while floating-point math shows 117,453 against 70,587, a 66.4 percent margin. The prime number search benchmark, a classic test of raw arithmetic capability, sees the 8945HX score 262 versus 129, a 103.1 percent delta, effectively doubling the P185 output.

The multithreaded test reinforces the trend: 51,405 for the 8945HX, 31,817 for the P185, a 61.6 percent advantage. Random string sorting, which stresses memory access patterns and sorting algorithms, yields 78,781 versus 40,557, a 94.2 percent gap. The physics simulation test is the closest of the 8945HX wins, with 2,168 against 1,772, a 22.3 percent margin. This narrower spread suggests the P185 holds up better in workloads that involve moderate thread counts or specific physics calculations.

The single-threaded results flip the narrative. The P185 scores 3,977 in both passmark_single_thread and passmark_singlethread, while the 8945HX records 3,907 in both, giving the P185 a 1.8 percent edge. This is a small but consistent win, repeated across two identical test entries, indicating that the P185's per-core architecture delivers slightly superior performance on lightly threaded tasks. The average benchmark score tells the broader story: the 8945HX averages 76,212 across all tests, while the P185 averages 62,839. The 8945HX sits at the 95th percentile of all CPUs in the database, while the P185 lands at the 93rd percentile, a modest overall ranking difference despite the large individual test gaps.

Architecture Differences

The two processors diverge fundamentally in design philosophy. The Ryzen 9 8945HX belongs to the 8000 series and uses the Zen 4 architecture under the Dragon Range codename. It is built on a 5 nm process at TSMC with 13,140 million transistors spread across two 71 mm² dies. The Ryzen AI Embedded P185 uses a Zen 5 / Zen 5c hybrid design under the Gorgon Point codename, fabricated on a 4 nm process at the same foundry, with a single 233 mm² die. The node shrink from 5 nm to 4 nm gives the P185 a density advantage, but the 8945HX compensates with a dual-die configuration.

Core counts differ substantially. The 8945HX offers 16 cores and 32 threads, while the P185 provides 12 cores and 24 threads. This 4-core, 8-thread gap explains much of the multithreaded performance delta. Clock speeds also favor the 8945HX: a 2.50 GHz base clock and 5.40 GHz boost, versus 2.00 GHz base and 5.10 GHz boost for the P185. The 8945HX starts and ends higher, giving it an advantage in both sustained and peak frequency scenarios.

Cache configurations present a striking contrast. The 8945HX allocates 64 KB of L1 per core, 1 MB of L2 per core, and a large 64 MB of L3 cache. The P185 uses 80 KB of L1 per core, 1 MB of L2 per core, but only 16 MB of L3. The 48 MB difference in L3 cache is a major factor in the 8945HX's dominance in memory-sensitive workloads such as data compression and random string sorting. The larger L3 pool allows more data to remain on-die, reducing repeated memory traffic.

Memory support shows another divergence. The 8945HX supports DDR5 only, with dual-channel architecture and a memory bandwidth of 83.2 GB/s. The P185 supports both DDR5 and LPDDR5X, also dual-channel, with a slightly higher bandwidth of 89.6 GB/s. The P185 also includes ECC memory support, a feature absent on the 8945HX, which matters for embedded and reliability-focused deployments. PCIe capability favors the 8945HX, which provides Gen 5 with 28 lanes from the CPU, while the P185 offers Gen 4 with 16 lanes. The 8945HX supports a wider and faster expansion interface, while the P185 trades that for lower power consumption.

Power profiles differ sharply. The 8945HX has a 55 W TDP, while the P185 operates at 28 W. This near-halving of thermal budget explains the P185's lower clock speeds and reduced core count. The integrated graphics also differ: the 8945HX uses the Radeon 610M, while the P185 features the Radeon 890M, a more capable GPU unit for embedded visual tasks. The 8945HX has an unlocked multiplier, allowing overclocking, while the P185 is locked.

FAQ

Q: Which processor wins in single-threaded performance?

A: The AMD Ryzen AI Embedded P185 holds a slight edge. It scores 3,977 in the single-threaded PassMark test, while the AMD Ryzen 9 8945HX scores 3,907, a 1.8 percent difference in favor of the P185.

Q: What is the largest performance gap between the two?

A: The biggest margin is in data encryption, where the 8945HX scores 40,836 versus 19,612 for the P185, a 108.2 percent advantage. This means the 8945HX delivers more than double the encryption throughput.

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

A: The 8945HX averages 76,212 across all recorded benchmarks, placing it at the 95th percentile of all CPUs. The P185 averages 62,839, placing it at the 93rd percentile. The 8945HX is roughly 21 percent higher in the overall average.

Q: Does the P185 offer any memory advantages over the 8945HX?

A: Yes. The P185 supports both DDR5 and LPDDR5X memory, while the 8945HX supports DDR5 only. The P185 also has ECC memory support and a slightly higher memory bandwidth of 89.6 GB/s compared to 83.2 GB/s for the 8945HX.

Q: Why does the 8945HX dominate in multithreaded workloads?

A: The 8945HX has 16 cores and 32 threads, versus 12 cores and 24 threads for the P185. It also has a higher base clock of 2.50 GHz versus 2.00 GHz, a higher boost clock of 5.40 GHz versus 5.10 GHz, and a much larger 64 MB L3 cache versus 16 MB.

Q: Which processor has a lower power consumption profile?

A: The P185 has a TDP of 28 W, while the 8945HX has a TDP of 55 W. This makes the P185 better suited for power-constrained embedded environments, while the 8945HX requires a more substantial cooling solution.

Specification Differences

| Specification | AMD Ryzen 9 8945HX | AMD Ryzen AI Embedded P185 |

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

| Cores | 16 | 12 |

| Threads | 32 | 24 |

| Base Clock | 2.50 GHz | 2.00 GHz |

| Boost Clock | 5.40 GHz | 5.10 GHz |

| TDP | 55 W | 28 W |

| Socket | AMD Socket FL1 | AMD Socket FP8 |

| Architecture | Zen 4 | Zen 5 / Zen 5c |

| Codename | Dragon Range | Gorgon Point |

| Process Node | 5 nm | 4 nm |

| Transistors | 13,140 million | Not specified |

| Die Size | 2x 71 mm² | 233 mm² |

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

| L3 Cache | 64 MB | 16 MB |

| Memory Support | DDR5 | DDR5, LPDDR5X |

| Memory Bandwidth | 83.2 GB/s | 89.6 GB/s |

| ECC Memory | No | Yes |

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

| Integrated Graphics | Radeon 610M | Radeon 890M |

| Multiplier Unlocked | Yes | No |

| Part Number | 100-000001848 | Unknown |

| Release Date | 2025-04-22 | 2026-02-28 |

The Verdict

The data indicates that the AMD Ryzen 9 8945HX is the superior choice for compute-intensive workloads that leverage many cores and high clock speeds. Its 16-core, 32-thread configuration, 5.40 GHz boost, and 64 MB L3 cache deliver decisive wins across all multithreaded benchmarks, with margins ranging from 22.3 percent in physics to 108.2 percent in encryption. The 8945HX also holds the overall average benchmark advantage at 76,212 versus 62,839, and its 95th percentile ranking places it among the top-tier CPUs in the database.

The AMD Ryzen AI Embedded P185 counters with two specific strengths. First, it wins in single-threaded performance by 1.8 percent, a narrow but consistent margin. Second, it offers a lower power envelope at 28 W TDP, a feature set geared toward embedded applications, including ECC memory support and a more capable Radeon 890M integrated GPU. The P185 also supports LPDDR5X memory, which can reduce power consumption in memory subsystems.

For users prioritizing raw processing power, the 8945HX is the clear choice. Its performance in data compression, encryption, and floating-point math is substantially higher, and its unlocked multiplier allows for further frequency tuning. For deployments where power efficiency, ECC reliability, and embedded-specific features take precedence, the P185 provides a balanced alternative, even if it sacrifices significant multithreaded throughput.

Where Each One Wins

The AMD Ryzen 9 8945HX dominates in every multithreaded and compute-heavy category. Data compression shows an 81 percent lead, making it the preferred option for archiving, database compression, and file system workloads. Data encryption shows a 108.2 percent advantage, ideal for VPN gateways, secure storage, and cryptographic processing. Extended instructions deliver an 87.7 percent edge, benefiting workloads such as media encoding and scientific simulations. Prime number search, a pure arithmetic test, doubles the P185 output with a 103.1 percent delta. Floating-point math wins by 66.4 percent, integer math by 65.6 percent, and multithreaded performance by 61.6 percent. Random string sorting, which stresses cache and memory access, shows a 94.2 percent advantage. Physics simulation, the closest of the 8945HX wins, still lands 22.3 percent ahead.

The AMD Ryzen AI Embedded P185 wins in the single-threaded domain, taking both single-thread test entries by 1.8 percent. This makes it slightly better for lightly threaded applications, legacy software, or tasks where per-core latency matters more than total throughput. The P185 also holds advantages outside raw benchmarks: its 28 W TDP makes it suitable for fanless or passively cooled embedded systems, its ECC memory support provides error correction for mission-critical deployments, and its Radeon 890M integrated graphics offer a stronger visual processing foundation than the 8945HX's Radeon 610M. The P185 supports a wider memory type range with LPDDR5X, and its 89.6 GB/s memory bandwidth slightly exceeds the 8945HX's 83.2 GB/s, though this does not translate into benchmark wins. Users choosing the P185 should prioritize power efficiency, reliability features, and embedded form factors over raw computational output.