AMD Ryzen AI Max 390 vs Intel Core Ultra X9 388H Comparison

The AMD Ryzen AI Max 390 and Intel Core Ultra X9 388H represent two distinct approaches to mobile processing, with the data revealing a clear split between multi-threaded throughput and specialized workloads. The Ryzen AI Max 390 secures 11 benchmark wins, while the Core Ultra X9 388H takes 6, but the margin of victory in each category tells a more nuanced story.

Head-to-Head Benchmarks

The most decisive result appears in Cinebench R23 multi-core, where the AMD Ryzen AI Max 390 scores 36,064 against the Intel Core Ultra X9 388H's 18,911, a massive 90.7% advantage. This gap is mirrored in Cinebench R23 single-core, with the AMD part scoring 5,091 versus 2,200.5, a 131.4% lead. The Cinebench R15 multi-core test shows a 23% win for AMD (3,635 vs 2,955), while R15 single-core favors AMD by 65.8% (513 vs 309.5). Cinebench R20 results are consistent: AMD leads by 15.6% in both multi-core (15,146 vs 13,101) and single-core (2,138 vs 1,849).

PassMark integer math heavily favors the AMD processor, with a score of 146,519 against 90,882, a 61.2% advantage. Data compression also goes to AMD, 487,145 versus 361,763, a 34.7% margin. Extended instructions show AMD ahead by 29.3% (38,716 vs 29,943). Random string sorting favors AMD by 20.7% (53,113 vs 44,010), and PassMark multi-thread shows AMD winning by 13.4% (41,737 vs 36,811).

The Intel Core Ultra X9 388H claims its biggest win in floating-point math, scoring 112,550 against 90,594, a 19.5% advantage. Data encryption goes to Intel by 11.9% (28,490 vs 25,097). Physics tests favor Intel by 14.4% (3,226 vs 2,761). Prime number finding shows Intel ahead by 11.7% (358 vs 316). In PassMark single-thread, Intel wins narrowly by 5.9% (4,280 vs 4,028).

The Verdict

The benchmark data positions the AMD Ryzen AI Max 390 as the stronger overall processor, with an average benchmark score of 56,273 placing it in the 91st percentile of all CPUs. The Intel Core Ultra X9 388H averages 44,466, sitting in the 88th percentile. AMD's nearest rival comparisons show it essentially tied with the AMD Ryzen AI 9 HX PRO 470 (0.1% behind) and 0.5% ahead of the Intel Core i9-14900HX. The Intel part's closest competitor is the AMD Ryzen 5 7500X3D, with the Core Ultra X9 388H trailing by 0.2%.

The Cinebench R23 multi-core result is the clearest differentiator. A 90.7% margin in that test indicates the AMD processor delivers roughly double the sustained rendering throughput. The single-core Cinebench R23 gap of 131.4% is even more striking, suggesting architectural efficiency differences beyond core count alone. For users whose workloads scale with multi-threaded performance, the Ryzen AI Max 390 is the clear choice based on recorded data.

The Intel part does not lack merit. Its wins in floating-point math, encryption, physics, and single-thread PassMark tests show specific strengths. The 5.9% single-thread PassMark advantage, while modest, indicates competitive per-core performance in certain instruction patterns. However, the overall score differential of roughly 26% between the two processors (56,273 vs 44,466) reflects a substantial performance gap in the majority of tested scenarios.

Where Each One Wins

The AMD Ryzen AI Max 390 dominates in rendering and content creation workloads. Its Cinebench R23 multi-core score of 36,064 versus 18,911 makes it the preferred option for 3D rendering, video encoding, and batch processing tasks. The 61.2% lead in integer math similarly benefits compilation, simulation, and general productivity applications. Data compression at 34.7% ahead helps archiving and database workloads. Extended instructions at 29.3% ahead supports cryptography and scientific computing. Random string sorting at 20.7% ahead improves log processing and data manipulation tasks.

The Intel Core Ultra X9 388H takes the lead in floating-point intensive calculations, with a 19.5% advantage in PassMark floating-point math. This benefits scientific simulations, financial modeling, and certain AI inference workloads that rely heavily on FP32/FP64 operations. Data encryption at 11.9% ahead makes it marginally better for security-focused tasks. The physics score advantage of 14.4% suggests better performance in physics simulation engines. Prime number finding at 11.7% ahead indicates stronger performance in number-theoretic computations. The 5.9% single-thread PassMark win shows it edges ahead in lightly threaded applications with simple instruction patterns.

FAQ

Q: Which processor has more cores?

A: The Intel Core Ultra X9 388H has 16 cores, while the AMD Ryzen AI Max 390 has 12 cores. However, the Intel part has 16 threads (one per core), while the AMD part has 24 threads (two per core).

Q: Which processor has the higher boost clock?

A: The Intel Core Ultra X9 388H boosts to 5.10 GHz, slightly higher than the AMD Ryzen AI Max 390's 5.00 GHz boost clock.

Q: How do the cache sizes compare?

A: The AMD Ryzen AI Max 390 has 64 MB of shared L3 cache, while the Intel Core Ultra X9 388H has 18 MB of shared L3 cache. Per-core L1 and L2 caches also differ: AMD uses 80 KB L1 and 1 MB L2 per core, while Intel uses 192 KB L1 and 3 MB L2 per core.

Q: Which processor has higher memory bandwidth?

A: The AMD Ryzen AI Max 390 supports quad-channel LPDDR5X memory with 256.0 GB/s bandwidth. The Intel Core Ultra X9 388H uses dual-channel LPDDR5X with 153.6 GB/s bandwidth.

Q: Which processor wins in Cinebench R23 multi-core?

A: The AMD Ryzen AI Max 390 wins decisively with a score of 36,064 versus 18,911 for the Intel Core Ultra X9 388H, a 90.7% advantage.

Q: Does the Intel processor win any PassMark tests?

A: Yes, the Intel Core Ultra X9 388H wins PassMark data encryption (28,490 vs 25,097), find prime numbers (358 vs 316), floating-point math (112,550 vs 90,594), physics (3,226 vs 2,761), and single-thread (4,280 vs 4,028).

Architecture Differences

The two processors use fundamentally different silicon. The AMD Ryzen AI Max 390 is built on a 4 nm process at TSMC, using the Zen 5 architecture with the Strix Halo codename. The Intel Core Ultra X9 388H uses a 3 nm process at Intel's own foundry, based on the Panther Lake architecture. These process differences contribute to the distinct performance profiles observed in the benchmarks.

Core configuration differs significantly. The AMD part has 12 cores and 24 threads, indicating simultaneous multithreading support. The Intel part has 16 cores but only 16 threads, meaning it lacks hyperthreading. Despite fewer physical cores, the AMD processor's multithreading capability allows it to handle 24 concurrent threads, which explains its massive lead in multi-threaded Cinebench tests. The Intel part's 16 physical cores without extra threads still delivers competitive performance in some workloads but falls far behind in heavily threaded scenarios.

Cache hierarchy presents a major divergence. The AMD processor allocates 80 KB L1 and 1 MB L2 per core, with a massive 64 MB shared L3 cache. The Intel processor uses 192 KB L1 and 3 MB L2 per core, but only 18 MB of shared L3. The AMD part's larger L3 pool likely contributes to its strong performance in data compression and integer math, where larger working sets can reside on-chip.

Memory architecture also differs. The AMD Ryzen AI Max 390 supports quad-channel LPDDR5X with 256.0 GB/s bandwidth, while the Intel Core Ultra X9 388H uses dual-channel LPDDR5X at 153.6 GB/s. This 66.7% bandwidth advantage for AMD supports its higher throughput in memory-intensive workloads. The AMD part also supports ECC memory, while the Intel part does not.

PCIe connectivity shows a notable inversion. The AMD processor offers Gen 4 with 16 lanes, while the Intel processor provides Gen 5 with only 4 lanes. The Intel part's newer PCIe generation offers higher per-lane bandwidth, but the AMD part's 16 lanes provide more total connectivity for peripherals. Both processors use integrated graphics: AMD with Radeon 8050S and Intel with Arc B390.

Thermal design also differs. The AMD Ryzen AI Max 390 has a 55 W TDP, while the Intel Core Ultra X9 388H is rated at 25 W. The higher power envelope for AMD supports its higher base clock of 3.20 GHz versus 2.10 GHz for Intel. The boost clocks are closer, at 5.00 GHz for AMD and 5.10 GHz for Intel. The AMD processor uses the AMD Socket FP11, while the Intel part uses Intel BGA 2540. The AMD part's release date is earlier, with a production status of Active for both. The Intel part belongs to the Core Ultra Series 3, while the AMD part is in the Ryzen AI Max generation.