AMD Ryzen 9 PRO 8945HS vs AMD Ryzen AI Max PRO 385 Comparison

AMD Ryzen AI Max PRO 385 and AMD Ryzen 9 PRO 8945HS are two 8-core, 16-thread mobile processors aimed at professional laptops. Both sit in the 88th percentile of all CPUs in the database, but their benchmark profiles differ in specific, measurable ways. The Ryzen AI Max PRO 385 wins 15 of 17 head-to-head comparisons, while the Ryzen 9 PRO 8945HS takes two. This analysis breaks down where each chip excels, what the architecture changes mean, and which workloads favor which processor.

The Verdict

The AMD Ryzen AI Max PRO 385 is the stronger all-round performer in this matchup. Its average benchmark score is 43,326, which is 3.2% higher than the Ryzen 9 PRO 8945HS’s 41,963. The gap is consistent across rendering, single-threaded tasks, and most compute-heavy workloads. In Cinebench R23 multi-core, the AI Max PRO 385 scores 28,424 versus 25,165, a 13% advantage. Single-core Cinebench R23 shows 4,012 versus 3,552, also a 13% lead. If you are buying for CPU compute density, the AI Max PRO 385 is the clear pick.

The Ryzen 9 PRO 8945HS is not without merit. It wins in data encryption (21,820 versus 18,978, a 13% margin) and random string sorting (44,668 versus 40,784, an 8.7% margin). These are narrower wins, but they are real. The 8945HS also has a lower 45 W TDP versus 55 W for the AI Max PRO 385, which matters in thin-and-light chassis where thermal headroom is limited. However, the data does not show any overall performance class where the 8945HS overtakes the AI Max PRO 385; its wins are isolated to specific instruction patterns.

For a professional user running rendering, physics simulation, extended instruction sets, or integer-heavy code, the Ryzen AI Max PRO 385 is the better choice. For encryption workloads or string-heavy data processing, the Ryzen 9 PRO 8945HS holds an edge. The AI Max PRO 385 also offers substantially more memory bandwidth (256.0 GB/s versus 89.6 GB/s) and a larger L3 cache (32 MB versus 16 MB), which the benchmark scores reflect. The verdict: pick the AI Max PRO 385 for maximum compute, pick the 8945HS if its specific strengths or lower power draw align with your workload.

FAQ

Q: Which processor is faster in multi-core rendering?

A: The AMD Ryzen AI Max PRO 385. In Cinebench R23 multi-core, it scores 28,424 versus 25,165 for the Ryzen 9 PRO 8945HS, a 13% difference. The same pattern appears in Cinebench R20 (11,938 versus 10,569) and R15 (2,865 versus 2,536), both with 13% leads.

Q: Does the Ryzen 9 PRO 8945HS win any benchmarks?

A: Yes, it wins two of the 17 head-to-head tests. In PassMark data encryption, it scores 21,820 versus 18,978, a 13% advantage. In PassMark random string sorting, it scores 44,668 versus 40,784, an 8.7% advantage.

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

A: The AI Max PRO 385 leads in every single-thread test. Cinebench R23 single-core shows 4,012 versus 3,552 (13% ahead), R20 shows 1,685 versus 1,491 (13% ahead), and R15 shows 404 versus 357 (13.2% ahead). PassMark single-thread is closer: 3,995 versus 3,920, a 1.9% margin.

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

A: The largest delta is in PassMark find prime numbers, where the AI Max PRO 385 scores 157 versus 91, a 72.5% advantage. That is an outlier; the next largest wins are 19.7% in PassMark physics and 13.5% in PassMark extended instructions.

Q: Do both processors support ECC memory?

A: Yes, both the Ryzen AI Max PRO 385 and the Ryzen 9 PRO 8945HS list ECC memory support as true in the database.

Q: Which processor has more memory bandwidth?

A: The Ryzen AI Max PRO 385 uses quad-channel LPDDR5X and reaches 256.0 GB/s. The Ryzen 9 PRO 8945HS uses dual-channel DDR5 and reaches 89.6 GB/s. That is a 2.86x difference in theoretical bandwidth.

Architecture Differences

The two processors come from different generations of AMD design. The Ryzen AI Max PRO 385 uses Zen 5 architecture on the Strix Halo codename, built on a 4 nm process at TSMC. The Ryzen 9 PRO 8945HS uses Zen 4 architecture on the Hawk Point codename, also on a 4 nm process at TSMC. Both are fabricated by the same foundry at the same node, so the performance gap comes from architectural changes, not process improvements.

The cache hierarchy is a major divergence. The AI Max PRO 385 has 80 KB of L1 per core, 1 MB of L2 per core, and 32 MB of shared L3. The 8945HS has 64 KB of L1 per core, 1 MB of L2 per core, and 16 MB of shared L3. The AI Max PRO 385 effectively doubles the L3 cache, which helps with data reuse and explains part of its lead in multi-threaded and single-threaded workloads. The L1 difference is also notable: 25% more per core.

Memory architecture differs completely. The AI Max PRO 385 uses LPDDR5X with a quad-channel bus, yielding 256.0 GB/s. The 8945HS uses DDR5 with a dual-channel bus, yielding 89.6 GB/s. This is a massive bandwidth advantage for the AI Max PRO 385, and it shows in bandwidth-sensitive tests like PassMark floating point math, where the AI Max PRO 385 scores 69,580 versus 63,490.

The integrated graphics differ as well. The AI Max PRO 385 pairs with Radeon 8050S, while the 8945HS pairs with Radeon 780M. The database does not include graphics benchmarks, but the memory bandwidth difference suggests the AI Max PRO 385 has a substantial advantage for iGPU-heavy tasks.

The sockets and platforms are not interchangeable. The AI Max PRO 385 uses AMD Socket FP11, while the 8945HS uses AMD Socket FP7. The 8945HS also has a higher PCIe lane count: Gen 4, 20 lanes versus Gen 4, 16 lanes for the AI Max PRO 385. The AI Max PRO 385 has a higher TDP at 55 W versus 45 W for the 8945HS.

The 8945HS has known transistor and die size figures: 25,000 million transistors and a 178 mm² die. The AI Max PRO 385 does not list these in the database. The 8945HS also has a part number of 100-000001314 (FP7r2) and 100-000001386 (FP7), while the AI Max PRO 385 is listed as 100-000001422.

Specification Differences

The Ryzen AI Max PRO 385 has a base clock of 3.60 GHz and a boost clock of 5.00 GHz. The Ryzen 9 PRO 8945HS has a higher base clock of 4.00 GHz and a higher boost clock of 5.20 GHz. Despite the clock disadvantage, the AI Max PRO 385 wins every single-thread benchmark except PassMark single-thread, where it still leads by 1.9%. This implies the Zen 5 architecture delivers more instructions per clock than Zen 4.

TDP differs: 55 W for the AI Max PRO 385 versus 45 W for the 8945HS. Both are mobile processors with active production status. The AI Max PRO 385 was released on 2025-01-05, while the 8945HS was released on 2024-04-15. Neither processor has a launch MSRP listed in the database.

Memory support is a key differentiator. The AI Max PRO 385 supports LPDDR5X with a quad-channel bus and 256.0 GB/s bandwidth. The 8945HS supports DDR5 with a dual-channel bus and 89.6 GB/s. Both support ECC memory.

PCIe configuration differs: the AI Max PRO 385 has Gen 4 with 16 lanes, while the 8945HS has Gen 4 with 20 lanes. The 8945HS offers more CPU-attached PCIe lanes for expansion. Neither processor has an unlocked multiplier.

Cache totals are different. The AI Max PRO 385 has 80 KB L1 per core, 1 MB L2 per core, and 32 MB shared L3. The 8945HS has 64 KB L1 per core, 1 MB L2 per core, and 16 MB shared L3. The L3 difference is the largest cache gap.

Integrated graphics differ: Radeon 8050S on the AI Max PRO 385 versus Radeon 780M on the 8945HS. The database does not provide iGPU benchmark scores, so no performance comparison is possible here.

Head-to-Head Benchmarks

The Ryzen AI Max PRO 385 dominates the Cinebench suite. In Cinebench R15 multi-core, it scores 2,865 versus 2,536, a 13% win. R15 single-core: 404 versus 357, a 13.2% win. R20 multi-core: 11,938 versus 10,569, a 13% win. R20 single-core: 1,685 versus 1,491, a 13% win. R23 multi-core: 28,424 versus 25,165, a 13% win. R23 single-core: 4,012 versus 3,552, a 13% win. These are uniform margins, suggesting the Zen 5 core improvement is consistent across all rendering workloads.

PassMark results are more varied. The AI Max PRO 385 wins data compression (379,448 versus 368,884, 2.9% ahead), extended instructions (31,442 versus 27,714, 13.5% ahead), find prime numbers (157 versus 91, 72.5% ahead), floating point math (69,580 versus 63,490, 9.6% ahead), integer math (105,056 versus 103,390, 1.6% ahead), multithread (32,075 versus 30,378, 5.6% ahead), physics (1,711 versus 1,430, 19.7% ahead), and single-thread (3,995 versus 3,920, 1.9% ahead).

The Ryzen 9 PRO 8945HS takes two wins. In data encryption, it scores 21,820 versus 18,978, a 13% advantage. In random string sorting, it scores 44,668 versus 40,784, an 8.7% advantage. These wins are notable because they are not small margins; encryption and string sorting are both memory and cache sensitive, yet the 8945HS outperforms the AI Max PRO 385 despite having half the L3 and a third of the memory bandwidth. This suggests the 8945HS has a more efficient path for these specific instruction sequences, possibly due to its higher base clock (4.00 GHz versus 3.60 GHz) or different memory controller behavior.

The biggest single win is PassMark find prime numbers, where the AI Max PRO 385 leads by 72.5%. This is an integer-heavy, branch-heavy workload, and the Zen 5 architecture clearly excels there. The next largest win is PassMark physics at 19.7%, followed by extended instructions at 13.5% and the Cinebench suite at 13%.

The overall average benchmark score tells the story: 43,326 for the AI Max PRO 385 versus 41,963 for the 8945HS. Both CPUs sit at the 88th percentile of all CPUs in the database. The AI Max PRO 385’s nearest rivals include the AMD Ryzen AI 9 465 (43,431, 0.2% behind), Intel Core Ultra 9 386H (43,210, 0.3% ahead), AMD Ryzen 7 170 (43,689, 0.8% behind), and AMD Ryzen 7 PRO 7745 (43,704, 0.9% behind). The 8945HS’s nearest rivals include the Intel Core i7-14700T (41,914, 0.1% ahead), AMD Ryzen 5 7400 (42,055, 0.2% behind), Intel Core i7-12850HX (41,779, 0.4% ahead), and Intel Core 7 251TE (41,650, 0.8% ahead). This places both chips in the upper tier of mobile processors, but the AI Max PRO 385 is consistently several points ahead in the average.

In summary, the recorded data shows a clear performance hierarchy: the Ryzen AI Max PRO 385 is the faster processor in most workloads, with a 13% lead in rendering, a 13.5% lead in extended instructions, and a 19.7% lead in physics. The Ryzen 9 PRO 8945HS is the better choice only for encryption and string sorting, where it leads by 13% and 8.7% respectively. The AI Max PRO 385 also offers more memory bandwidth and cache, which likely underpins its broader advantage. The 8945HS counters with a lower TDP, higher clocks, and more PCIe lanes, but those do not translate into benchmark wins outside its two specialties.