AMD Ryzen AI Max+ 388 vs AMD Ryzen Embedded 8645HS Comparison

The AMD Ryzen AI Max+ 388 and the AMD Ryzen Embedded 8645HS serve different corners of the mobile processor market, and the recorded data shows a clear performance hierarchy. The AI Max+ 388, with its 8-core Zen 5 architecture, delivers substantial multi-threaded and single-threaded gains over the 6-core Zen 4 Embedded part. The following analysis draws exclusively from the database records to break down their benchmark results, architectural choices, and functional use cases.

Head-to-Head Benchmarks

The database contains a full suite of benchmark results for the AMD Ryzen AI Max+ 388, while the AMD Ryzen Embedded 8645HS has no recorded benchmark scores. Consequently, all quantitative comparisons rely on the AI Max+ 388's absolute scores and its percentile standing against the broader CPU population. The AI Max+ 388 achieves a 90th percentile ranking across all CPUs, indicating top-decile performance, whereas the Embedded 8645HS sits at the 50th percentile, a median mark.

In Cinebench R23 multi-core, the AI Max+ 388 scores 18,759 points. This result places it in a competitive bracket against the nearest rivals listed in the database. The Intel Core 9 273PE, with an average score of 49,845, is a near match, sitting just 0.1% ahead of the AI Max+ 388's average benchmark score of 49,796. The Intel Core i5-14600KF trails by a 0.8% margin with an average score of 49,394, and the AMD Ryzen 9 7900 sits 1.2% behind at 49,228. The AMD Ryzen 7 PRO 5755G also sits 1.2% behind at 49,196. These deltas show the AI Max+ 388 is effectively neck-and-neck with a current Intel Core 9 part and slightly ahead of several desktop-class rivals.

The single-core Cinebench R23 score for the AI Max+ 388 is 1,960 points. This strong single-threaded result, combined with the multi-core score, indicates balanced performance across both lightly and heavily threaded workloads. In Cinebench R15, the AI Max+ 388 records 2,872 points multi-core and 298 points single-core, reinforcing the same pattern.

PassMark results for the AI Max+ 388 further define its capabilities. The multi-thread score is 33,486, and the single-thread score is 4,185. In specific compute tasks, the floating-point math score reaches 72,722, while integer math hits 109,588. Data compression scores 400,887, and data encryption records 20,092. Extended instruction performance is strong at 32,719, with random string sorting at 43,196. The physics test yields 1,843 points, and finding prime numbers returns 145 points.

These figures place the AI Max+ 388 in a league where it trades blows with the Intel Core 9 273PE and outperforms the Intel Core i5-14600KF and AMD Ryzen 9 7900 by narrow margins. Since the Embedded 8645HS lacks any recorded scores, the database provides no direct head-to-head numbers. The AI Max+ 388's 90th percentile ranking versus the Embedded 8645HS's 50th percentile ranking is the clearest comparative signal available.

Where Each One Wins

The AI Max+ 388 wins in every measurable category due to its superior core count, newer architecture, and higher thread count. With 8 cores and 16 threads, it outnumbers the Embedded 8645HS's 6 cores and 12 threads by two cores and four threads. This advantage translates directly to multi-threaded workloads such as video rendering, 3D simulation, and heavy data processing, where the Cinebench R23 multi-core score of 18,759 demonstrates strong scaling.

The AI Max+ 388 also wins on single-threaded performance, as its Zen 5 architecture and 5.00 GHz boost clock deliver a Cinebench R23 single-core score of 1,960. The Embedded 8645HS also boosts to 5.00 GHz, but its older Zen 4 cores and smaller cache configuration put it at a disadvantage in per-thread efficiency.

For memory-intensive tasks, the AI Max+ 388 holds a significant edge. It uses quad-channel LPDDR5X memory with a bandwidth of 256.0 GB/s, while the Embedded 8645HS uses dual-channel DDR5 with 89.6 GB/s. This 166.4 GB/s difference gives the AI Max+ 388 a massive advantage in workloads that depend on memory throughput, such as database operations, large-scale simulations, and AI inference.

The Embedded 8645HS, however, is designed for embedded systems where power efficiency and a lower thermal envelope are priorities. Its 45 W TDP versus the AI Max+ 388's 55 W TDP suggests the Embedded part is better suited for fanless or compact industrial systems. The Embedded 8645HS also offers more PCIe lanes, with 20 lanes versus 16 lanes on the AI Max+ 388, which could be advantageous in systems requiring additional expansion slots for peripherals or controllers.

The integrated graphics differ as well. The AI Max+ 388 uses a Radeon 8060S, while the Embedded 8645HS uses a Radeon 760M. The database does not provide benchmark scores for either GPU, but the higher-tier Radeon 8060S on the AI Max+ 388 likely delivers more compute capability for graphics and general-purpose GPU tasks.

Architecture Differences

The two processors come from different generations and microarchitectures. The AI Max+ 388 is based on Zen 5, codenamed Strix Halo, and belongs to the Ryzen AI Max generation. The Embedded 8645HS uses Zen 4, codenamed Hawk Point, part of the Ryzen Embedded 8000 series. Both are built on a 4 nm process node by TSMC, but the AI Max+ 388 uses a chiplet design with a die size of 2x 70.6 mm², while the Embedded 8645HS uses a monolithic die of 178 mm². The Embedded part has a stated transistor count of 25,000 million, while the AI Max+ 388 does not have a recorded transistor count.

Cache configurations differ significantly. The AI Max+ 388 provides 80 KB of L1 cache per core, 1 MB of L2 per core, and 32 MB of shared L3 cache. The Embedded 8645HS provides 64 KB of L1 per core, 1 MB of L2 per core, and only 16 MB of shared L3 cache. This doubling of L3 cache on the AI Max+ 388 improves hit rates for frequently accessed data and reduces latency in multi-threaded workloads.

Memory support also diverges. The AI Max+ 388 uses LPDDR5X memory with a quad-channel bus, delivering 256.0 GB/s of bandwidth. The Embedded 8645HS uses DDR5 memory with a dual-channel bus, delivering 89.6 GB/s. Both support ECC memory, which is crucial for embedded and server environments where data integrity is paramount.

The sockets differ: the AI Max+ 388 uses AMD Socket FP11, while the Embedded 8645HS uses AMD Socket FP8. This means they are not interchangeable on the same motherboard. PCIe support is Gen 4 on both, but the lane counts differ: 16 lanes for the AI Max+ 388 and 20 lanes for the Embedded 8645HS. Neither processor has an unlocked multiplier, so overclocking is not supported.

The release dates show a generational gap. The Embedded 8645HS was released on 2024-04-01, while the AI Max+ 388 came later on 2026-01-05. The AI Max+ 388 is the newer design with architecture improvements and a higher TDP allowance.

FAQ

Q: Which processor has more cores and threads?

A: The AMD Ryzen AI Max+ 388 has 8 cores and 16 threads, while the AMD Ryzen Embedded 8645HS has 6 cores and 12 threads.

Q: How do their boost clocks compare?

A: Both processors have a maximum boost clock of 5.00 GHz. The base clocks differ, with the AI Max+ 388 at 3.60 GHz and the Embedded 8645HS at 4.30 GHz.

Q: What is the difference in memory bandwidth?

A: The AI Max+ 388 supports quad-channel LPDDR5X with 256.0 GB/s bandwidth, while the Embedded 8645HS supports dual-channel DDR5 with 89.6 GB/s bandwidth.

Q: Which processor has a higher L3 cache capacity?

A: The AI Max+ 388 has 32 MB of shared L3 cache, while the Embedded 8645HS has 16 MB of shared L3 cache.

Q: Are both processors built on the same manufacturing process?

A: Yes, both are built on a 4 nm process node by TSMC, but they use different die designs. The AI Max+ 388 uses a chiplet layout of 2x 70.6 mm², and the Embedded 8645HS uses a monolithic die of 178 mm².

Q: Do both processors support ECC memory?

A: Yes, both the AI Max+ 388 and the Embedded 8645HS support ECC memory.

Specification Differences

The following fields differ between the AMD Ryzen AI Max+ 388 and the AMD Ryzen Embedded 8645HS:

• Cores: 8 vs 6
• Threads: 16 vs 12
• Base Clock: 3.60 GHz vs 4.30 GHz
• TDP: 55 W vs 45 W
• Socket: AMD Socket FP11 vs AMD Socket FP8
• Architecture: Zen 5 vs Zen 4
• Codename: Strix Halo vs Hawk Point
• Generation: Ryzen AI Max (Zen 5 (Strix Halo)) vs Ryzen Embedded (Zen 4 (Hawk Point))
• Die Size: 2x 70.6 mm² vs 178 mm²
• Transistors: Not recorded vs 25,000 million
• L1 Cache: 80 KB per core vs 64 KB per core
• L3 Cache: 32 MB shared vs 16 MB shared
• Memory Support: LPDDR5X vs DDR5
• Memory Bus: Quad-channel vs Dual-channel
• Memory Bandwidth: 256.0 GB/s vs 89.6 GB/s
• PCIe Lanes: 16 vs 20
• Integrated Graphics: Radeon 8060S vs Radeon 760M
• Release Date: 2026-01-05 vs 2024-04-01
• Part Number: 100-000001980 vs unknown
• Benchmark Scores: Various scores recorded vs none recorded
• Percentile Vs All CPUs: 90 vs 50
• Average Benchmark Score: 49,796 vs 0
• Nearest Rivals: Intel Core 9 273PE, Intel Core i5-14600KF, AMD Ryzen 9 7900, AMD Ryzen 7 PRO 5755G vs none

The data confirms the AI Max+ 388 as the higher-performing part across all measured metrics, while the Embedded 8645HS offers a lower TDP and more PCIe lanes for embedded applications. The absence of benchmark scores for the Embedded 8645HS in the database leaves its absolute performance unquantified, but its architectural specifications indicate a more modest capability profile.