AMD Ryzen AI Max+ 388 vs AMD Ryzen Embedded 8840U Comparison

FAQ

Q: What are the core and thread counts of the AMD Ryzen AI Max+ 388 and the AMD Ryzen Embedded 8840U?

A: Both processors feature 8 cores and 16 threads.

Q: Which processor has the higher boost clock?

A: The AMD Ryzen Embedded 8840U has a boost clock of 5.10 GHz, while the AMD Ryzen AI Max+ 388 boosts to 5.00 GHz.

Q: How do their L3 cache sizes compare?

A: The AMD Ryzen AI Max+ 388 has 32 MB of shared L3 cache, while the AMD Ryzen Embedded 8840U has 16 MB of shared L3 cache.

Q: What are the memory bandwidth specifications for each chip?

A: The AMD Ryzen AI Max+ 388 supports quad-channel LPDDR5X memory with 256.0 GB/s bandwidth, while the AMD Ryzen Embedded 8840U uses dual-channel DDR5 with 89.6 GB/s bandwidth.

Q: Which processor has the higher TDP?

A: The AMD Ryzen AI Max+ 388 has a TDP of 55 W, compared to the AMD Ryzen Embedded 8840U's 28 W TDP.

Q: What integrated graphics do these processors use?

A: The AMD Ryzen AI Max+ 388 features Radeon 8060S graphics, while the AMD Ryzen Embedded 8840U uses Radeon 780M graphics.

The Verdict

The benchmark database shows a clear performance gap between these two AMD mobile processors, driven by architectural generation and memory subsystem differences. The AMD Ryzen AI Max+ 388, built on the Zen 5 architecture with a quad-channel memory interface, holds a substantial advantage across all recorded benchmarks. Its average benchmark score of 49796 places it in the 90th percentile of all CPUs, a position far above the Ryzen Embedded 8840U, which sits in the 50th percentile with an average score of 0 due to no recorded benchmark data in the database.

The data indicates the Ryzen AI Max+ 388 is the pick for compute-heavy workloads, memory-bandwidth-sensitive tasks, and applications that benefit from the larger 32 MB L3 cache. Its 256.0 GB/s memory bandwidth is roughly three times the 89.6 GB/s of the 8840U, a gap that directly impacts data-intensive operations. The Ryzen Embedded 8840U, with its 28 W TDP, is the choice for power-constrained embedded deployments where the lower thermal envelope matters more than raw throughput. The 8840U also offers 20 PCIe Gen 4 lanes versus 16 on the AI Max+ 388, which could favor certain embedded I/O configurations.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark comparisons between these two processors, meaning no side-by-side test scores are available. However, the AI Max+ 388 has a full set of Cinebench and PassMark results, while the 8840U has none recorded. This absence of data for the 8840U is itself informative: the AI Max+ 388's recorded scores stand as the only quantitative evidence for comparison.

Looking at the AI Max+ 388's absolute performance, its Cinebench R23 multicore score of 18759 and single-core score of 1960 indicate strong throughput. The PassMark multithread score of 33486 and single-thread score of 4185 reinforce this. In data compression, the chip scores 400887, and in data encryption it reaches 20092. Floating point math scores 72722, integer math hits 109588, and extended instructions reach 32719. Physics testing yields 1843, find prime numbers scores 145, and random string sorting reaches 43196.

Since the 8840U has no recorded benchmark scores, the database cannot quantify how much faster the AI Max+ 388 is in each specific test. The percentile data provides the only relative measure: the AI Max+ 388 sits at the 90th percentile versus the 8840U's 50th percentile. This 40-percentile-point spread, combined with the architectural differences, suggests a wide performance chasm, but the exact deltas remain unmeasured.

Specification Differences

The two processors differ across nearly every specification field in the database. The AI Max+ 388 has a base clock of 3.60 GHz and boost clock of 5.00 GHz, while the 8840U has a 3.30 GHz base and 5.10 GHz boost. The AI Max+ 388 uses a different socket (AMD Socket FP11) compared to the 8840U's AMD Socket FP8. The TDP values diverge significantly: 55 W for the AI Max+ 388 versus 28 W for the 8840U.

The memory systems are entirely different. The AI Max+ 388 supports LPDDR5X over a quad-channel bus with 256.0 GB/s bandwidth. The 8840U supports DDR5 over a dual-channel bus with 89.6 GB/s bandwidth. Both support ECC memory. PCIe lane counts also differ: the AI Max+ 388 provides Gen 4 with 16 lanes (CPU only), while the 8840U provides Gen 4 with 20 lanes (CPU only).

The integrated graphics units differ: Radeon 8060S on the AI Max+ 388 versus Radeon 780M on the 8840U. The die size varies considerably, with the AI Max+ 388 using 2x 70.6 mm² dies and the 8840U using a single 178 mm² die. The 8840U lists a transistor count of 25,000 million, while the AI Max+ 388 has no recorded transistor figure. Both chips are active in production, target the mobile segment, have locked multipliers, and are manufactured by AMD with TSMC as the foundry.

Architecture Differences

The architectural split between these two processors is significant. The AI Max+ 388 uses the Zen 5 architecture under the Strix Halo codename, while the 8840U uses the older Zen 4 architecture under the Hawk Point codename. Both are built on a 4 nm process at TSMC, but the newer Zen 5 design brings architectural improvements that the database's benchmark results reflect.

Cache hierarchies differ markedly. The AI Max+ 388 has 80 KB of L1 cache per core, 1 MB of L2 cache per core, and 32 MB of shared L3 cache. The 8840U has 64 KB of L1 per core, 1 MB of L2 per core, and only 16 MB of shared L3 cache. The AI Max+ 388's L3 cache is double that of the 8840U, which aids in keeping larger working sets closer to the cores.

The memory architecture is another major differentiator. The AI Max+ 388's quad-channel LPDDR5X interface with 256.0 GB/s bandwidth provides roughly 2.9 times the theoretical bandwidth of the 8840U's dual-channel DDR5 at 89.6 GB/s. This bandwidth advantage can disproportionately benefit workloads that stream large datasets. The 8840U's PCIe Gen 4 lane count of 20 exceeds the AI Max+ 388's 16 lanes, which may matter for embedded applications needing more direct I/O connectivity. Both processors support ECC memory, and neither has an unlocked multiplier.

Where Each One Wins

The AMD Ryzen AI Max+ 388 wins in every recorded benchmark category, but the database only contains scores for this chip. Its 90th percentile ranking versus the 8840U's 50th percentile establishes it as the higher-performance part overall. Workloads that stress multi-core throughput, such as rendering, compilation, or scientific computing, will favor the AI Max+ 388 based on its Cinebench R23 multicore score of 18759 and PassMark multithread score of 33486. Single-threaded responsiveness also favors the AI Max+ 388, as shown by its PassMark single-thread score of 4185 and Cinebench R23 single-core score of 1960.

Memory-bandwidth-heavy tasks, such as large data compression workloads, strongly favor the AI Max+ 388 given its 256.0 GB/s bandwidth and 400887 PassMark data compression score. The 32 MB L3 cache provides another advantage for workloads with large reuse distances. For embedded deployments where power draw is a primary constraint, the 8840U wins on efficiency grounds: its 28 W TDP is less than half the AI Max+ 388's 55 W. The 8840U also offers more PCIe Gen 4 lanes (20 versus 16), which could win for systems needing additional high-speed I/O expansion.

The 8840U's higher boost clock of 5.10 GHz versus 5.00 GHz gives it a marginal clock-speed advantage, but the AI Max+ 388's newer Zen 5 architecture and larger cache compensate in actual performance. For any workload where the database has measured performance, the AI Max+ 388 delivers superior results. The 8840U's wins are confined to power efficiency, PCIe lane count, and its earlier release date of April 2024 compared to the AI Max+ 388's January 2026 release. Users needing maximum compute should select the AI Max+ 388; users prioritizing low power and I/O flexibility in an embedded context should consider the 8840U.