AMD Ryzen 9 8945HX vs AMD Ryzen AI 9 365 Comparison

Head-to-Head Benchmarks

The AMD Ryzen 9 8945HX is the decisive winner across every recorded benchmark. The database contains 15 head-to-head comparisons, and the 8945HX wins all 15, with zero wins for the Ryzen AI 9 365. The average benchmark score of 76,212 for the 8945HX places it in the 95th percentile of all CPUs, while the Ryzen AI 9 365's average of 40,048 lands in the 87th percentile.

The largest margin of victory appears in Cinebench R23 single-core, where the 8945HX scores 6,030 against 1,992 for the Ryzen AI 9 365, a 202.7% advantage. This is an exceptional gap for a single-threaded test, indicating that the 8945HX's higher boost clock (5.40 GHz versus 5.00 GHz) and architectural implementation provide a substantial per-thread advantage.

Multi-threaded workloads show similarly decisive results. In Cinebench R23 multi-core, the 8945HX records 42,713 points versus 18,698 points, a 128.4% lead. The Cinebench R15 multi-core test shows a 51.5% advantage (4,305 versus 2,842). The R15 single-core result shows a 100.3% delta (607 versus 303), which is notable because the R15 single-core test typically produces smaller absolute numbers, making a doubling of the score particularly significant.

PassMark suite results consistently favor the 8945HX. Data encryption shows a 123.2% lead (40,836 versus 18,297), and prime number finding shows a 123.9% advantage (262 versus 117). Extended instructions score 49,823 versus 25,113, a 98.4% delta. Random string sorting delivers 78,781 versus 39,447, a 99.7% gap. Floating-point math results show an 87% advantage (117,453 versus 62,802), while integer math records a 91.7% lead (195,180 versus 101,831).

The narrowest margin is in single-threaded PassMark performance. The 8945HX scores 3,907 versus 3,841, a modest 1.7% advantage. This suggests that for basic single-threaded integer operations, the two processors are nearly equivalent in absolute terms, despite the large Cinebench single-core gap. PassMark single-thread and singlethread tests both record the same 1.7% delta, confirming consistency across the two recorded fields.

Data compression shows a 91.2% lead (677,755 versus 354,510). The multithread PassMark score is 51,405 versus 29,467, a 74.4% advantage. Physics simulation results show a 27.2% gap (2,168 versus 1,704), the second-narrowest margin after single-threaded PassMark.

Architecture Differences

The two processors differ sharply in almost every fundamental architectural parameter. The Ryzen 9 8945HX uses the Zen 4 architecture on the Dragon Range codename, built on a 5 nm TSMC process. The Ryzen AI 9 365 uses the Zen 5 architecture with the Strix Point codename, on a 4 nm TSMC process. The 8945HX belongs to the 8000 series, while the 365 belongs to the Ryzen AI 300 series, which combines Zen 5 and Zen 5c cores.

Core counts differ by a wide margin. The 8945HX provides 16 cores and 32 threads, while the 365 provides 10 cores and 20 threads. This explains the large multi-threaded performance gaps, as the 8945HX has 60% more cores and 60% more threads. The base clock of the 8945HX is 2.50 GHz versus 2.00 GHz for the 365. Boost clocks are 5.40 GHz versus 5.00 GHz, respectively.

Cache hierarchies are fundamentally different. The 8945HX allocates 64 KB of L1 cache per core, 1 MB of L2 per core, and 64 MB of L3 cache. The 365 allocates 80 KB of L1 per core, 1 MB of L2 per core, and only 16 MB of L3 cache. While the 365 has larger per-core L1, the 8945HX's 64 MB L3 is four times larger, which significantly benefits workloads that fit within the shared cache.

Process node and die size differ. The 8945HX uses a 5 nm process with a die size of 2x 71 mm², totaling 142 mm², and contains 13,140 million transistors. The 365 uses a 4 nm process with a die size of 233 mm². The 365's transistor count is not recorded in the database.

Memory support differs in type and bandwidth. The 8945HX supports DDR5 only, while the 365 supports DDR5 and LPDDR5X. Both use dual-channel memory buses. The 365 records a higher memory bandwidth of 89.6 GB/s versus 83.2 GB/s for the 8945HX, likely due to the LPDDR5X support. Neither processor supports ECC memory.

PCIe connectivity differs. The 8945HX provides Gen 5 with 28 CPU-only lanes, while the 365 provides Gen 4 with 16 CPU-only lanes. The 8945HX has an unlocked multiplier, while the 365 is locked. Integrated graphics differ as well: the 8945HX uses the Radeon 610M, while the 365 uses the Radeon 880M.

Thermal design power differs substantially. The 8945HX is rated at 55 W TDP, while the 365 is rated at 28 W. The 8945HX uses the AMD Socket FL1, while the 365 uses the AMD Socket FP8. The 8945HX was released on 2025-04-22, while the 365 was released earlier on 2024-06-30.

Where Each One Wins

The 8945HX wins across every recorded benchmark category. No benchmark in the database shows a victory for the 365. The most pronounced wins for the 8945HX are in Cinebench R23 single-core (202.7% lead), prime number finding (123.9%), and data encryption (123.2%). These reflect the combined effects of more cores, higher clocks, and larger caches.

The 365's closest performance comes in PassMark single-threaded tests, where it trails by only 1.7%. This indicates that for simple single-threaded integer workloads, the architectural efficiency of the Zen 5 cores in the 365 nearly matches the Zen 4 cores in the 8945HX, despite the lower clock speeds. The physics workload shows the second-smallest gap at 27.2%, suggesting that the 365's core design handles physics calculations relatively better than other multi-threaded workloads.

For data compression, integer math, floating-point math, and random string sorting, the 8945HX leads by between 87% and 99.7%. These workloads benefit from the 8945HX's 16 cores, 32 threads, and 64 MB L3 cache. The multithread PassMark score shows a 74.4% advantage, while extended instructions show a 98.4% lead.

The Ryzen AI 9 365 does have advantages in power efficiency and memory bandwidth. Its 28 W TDP versus 55 W TDP means it draws less power, and its 89.6 GB/s memory bandwidth exceeds the 8945HX's 83.2 GB/s. However, these advantages do not translate into any benchmark wins in the recorded data.

FAQ

Q: Which processor has a higher single-core Cinebench R23 score?

A: The AMD Ryzen 9 8945HX scores 6,030, which is 202.7% higher than the Ryzen AI 9 365's 1,992.

Q: How many cores and threads does each processor have?

A: The Ryzen 9 8945HX has 16 cores and 32 threads. The Ryzen AI 9 365 has 10 cores and 20 threads.

Q: What is the difference in L3 cache size?

A: The Ryzen 9 8945HX has 64 MB of L3 cache. The Ryzen AI 9 365 has 16 MB of L3 cache.

Q: Which processor supports LPDDR5X memory?

A: The Ryzen AI 9 365 supports both DDR5 and LPDDR5X. The Ryzen 9 8945HX supports DDR5 only.

Q: What is the TDP of each processor?

A: The Ryzen 9 8945HX has a TDP of 55 W. The Ryzen AI 9 365 has a TDP of 28 W.

Q: Does either processor have an unlocked multiplier?

A: The Ryzen 9 8945HX has an unlocked multiplier. The Ryzen AI 9 365 does not.

Specification Differences

The two processors differ in the following recorded specifications:

• Cores: 16 (8945HX) versus 10 (365)
• Threads: 32 (8945HX) versus 20 (365)
• Base clock: 2.50 GHz (8945HX) versus 2.00 GHz (365)
• Boost clock: 5.40 GHz (8945HX) versus 5.00 GHz (365)
• TDP: 55 W (8945HX) versus 28 W (365)
• Socket: AMD Socket FL1 (8945HX) versus AMD Socket FP8 (365)
• Architecture: Zen 4 (8945HX) versus Zen 5 (365)
• Codename: Dragon Range (8945HX) versus Strix Point (365)
• Process node: 5 nm (8945HX) versus 4 nm (365)
• Transistor count: 13,140 million (8945HX) versus not recorded (365)
• Die size: 2x 71 mm² (8945HX) versus 233 mm² (365)
• L1 cache: 64 KB per core (8945HX) versus 80 KB per core (365)
• L3 cache: 64 MB (8945HX) versus 16 MB (365)
• Memory support: DDR5 (8945HX) versus DDR5 and LPDDR5X (365)
• Memory bandwidth: 83.2 GB/s (8945HX) versus 89.6 GB/s (365)
• PCIe: Gen 5, 28 lanes (8945HX) versus Gen 4, 16 lanes (365)
• Integrated graphics: Radeon 610M (8945HX) versus Radeon 880M (365)
• Multiplier unlocked: Yes (8945HX) versus No (365)
• Release date: 2025-04-22 (8945HX) versus 2024-06-30 (365)

Both processors share the same manufacturer (AMD), dual-channel memory bus, absence of ECC support, mobile market segment, and active production status.

The Verdict

The recorded data points to a single conclusion: the AMD Ryzen 9 8945HX dominates the Ryzen AI 9 365 in every measured performance category. The 8945HX's average benchmark score of 76,212 is nearly double the 365's 40,048. It ranks in the 95th percentile of all CPUs, while the 365 ranks in the 87th percentile.

The nearest rivals in the database place the 8945HX in elite company. Its average score of 76,212 is within 0.1% of the Intel Core Ultra 9 285HX (76,155), within 0.4% of the AMD EPYC Embedded 8224P (76,492), and within 0.6% of the AMD Ryzen 9 9950X3D (75,779). The 365's average of 40,048 is within 0.1% of the AMD Ryzen 7 7700 (40,081) and within 0.7% of the Intel Core i9-13905H (40,313).

Users who require maximum multi-threaded throughput, large cache capacity, and high core counts should select the 8945HX. Its 16 cores, 32 threads, and 64 MB L3 cache deliver Cinebench R23 multi-core scores that are 128.4% higher than the 365. The 8945HX also provides PCIe Gen 5 connectivity and an unlocked multiplier for flexibility.

The Ryzen AI 9 365 offers a lower TDP of 28 W, higher memory bandwidth of 89.6 GB/s, and a smaller 233 mm² die on a 4 nm process. Its Zen 5 architecture provides competitive single-threaded PassMark performance within 1.7% of the 8945HX. For workloads that are sensitive to power consumption and memory bandwidth, the 365 presents a more efficient package, but the performance gap in the benchmark data is substantial and consistent across all 15 recorded comparisons.