AMD Ryzen AI Max+ PRO 395 vs Intel Xeon 638 Comparison

The AMD Ryzen AI Max+ PRO 395 and Intel Xeon 638 are both 16-core, 32-thread processors, yet they occupy opposite ends of the computing spectrum: one is a mobile powerhouse with an integrated GPU, the other a workstation-class server chip with massive I/O. The benchmark data shows a near-perfect statistical tie in average score—80,762 for the AMD and 80,723 for the Intel, a 0.0% delta—but the distribution of wins across tests tells a far more interesting story about workload suitability.

Where Each One Wins

The Intel Xeon 638 dominates the head-to-head matchup, taking 11 of the 15 benchmark comparisons. Its most decisive victories come in single-core performance and rendering workloads. In Cinebench R23 single-core, the Xeon 638 scores 6,663 against the AMD’s 2,012.5, a 69.8% advantage that completely reshapes expectations for a server-class part. The Xeon also leads Cinebench R23 multi-core with 47,202 versus 35,061, a 25.7% margin, and Cinebench R15 multi-core with 4,757 versus 5,247—wait, that one actually goes to AMD with a 10.3% win. This mixed result suggests the AMD part excels in older rendering benchmarks while the Intel part pulls ahead in newer ones, likely due to architectural differences in instruction handling.

The Xeon’s winning pattern extends across most PassMark tests: data compression (725,818 vs 639,356, an 11.9% lead), data encryption (36,030 vs 32,840, 8.9% ahead), extended instructions (56,498 vs 52,067, 7.8% ahead), find prime numbers (381 vs 284, 25.5% ahead), floating point math (144,757 vs 120,533, 16.7% ahead), multithread (55,651 vs 51,502, 7.5% ahead), physics (4,704 vs 3,189, 32.2% ahead), and random string sorting (74,318 vs 70,150, 5.6% ahead). These are broad, consistent gains across integer-heavy and floating-point-heavy workloads.

However, the AMD Ryzen AI Max+ PRO 395 claims four wins, and they are strategically significant. It wins Cinebench R15 multi-core by 10.3%, PassMark integer math by 3.2% (190,720 vs 184,884), and PassMark single-thread by 11.1% (4,078 vs 3,670). The single-thread PassMark victory is particularly notable because it contradicts the Cinebench R23 single-core result, suggesting the AMD’s Zen 5 architecture handles certain single-threaded instruction patterns better, while the Intel’s Granite Rapids design excels in other single-thread scenarios. The integer math win shows AMD’s strength in pure integer arithmetic despite losing the floating-point test by a wide margin.

Architecture Differences

The fundamental architectural split explains most of the performance divergence. The AMD Ryzen AI Max+ PRO 395 uses Zen 5 architecture on a 4nm TSMC process, codenamed Strix Halo, while the Intel Xeon 638 uses Granite Rapids architecture on Intel’s 5nm process. The process node difference is minor, but the design philosophies diverge sharply.

Cache hierarchies differ notably. The AMD part offers 80 KB of L1 per core, 1 MB of L2 per core, and 64 MB of shared L3 cache. The Intel Xeon 638 provides 112 KB L1 per core, 2 MB L2 per core, and 72 MB of shared L3 cache. The Intel’s larger per-core L2 and L3 caches likely contribute to its advantages in data compression and encryption, where larger working sets benefit from more on-chip storage.

Memory subsystems also differ. The AMD uses LPDDR5X with a quad-channel bus delivering 256.0 GB/s bandwidth, while the Intel uses DDR5 with a quad-channel bus delivering 204.8 GB/s. Despite the AMD’s higher theoretical bandwidth, the Intel wins most memory-sensitive benchmarks, suggesting that cache efficiency and memory latency matter more than raw bandwidth in these tests. Both support ECC memory.

The platform divide is stark. The AMD is a mobile processor on AMD Socket FP11 with 16 PCIe Gen 4 lanes (CPU only), while the Intel is a server/workstation part on Intel Socket 4710 with 80 PCIe Gen 5 lanes. The Intel also has an unlocked multiplier and a 598 mm² die size, while the AMD’s multiplier is locked and has no listed die size. The AMD integrates Radeon 8060S graphics; the Intel has no integrated graphics at all. The AMD’s TDP is 55 watts versus the Intel’s 180 watts, a 3.3x difference that reflects the mobile versus server positioning.

The Verdict

The data points to a clear workload split. The Intel Xeon 638 is the better choice for rendering workloads, physics simulations, floating-point math, encryption, and any task that benefits from high single-core performance in Cinebench. Its 69.8% lead in Cinebench R23 single-core and 32.2% lead in PassMark physics make it the superior option for workstation applications that rely on these patterns.

The AMD Ryzen AI Max+ PRO 395 wins in integer math, PassMark single-thread, and Cinebench R15 multi-core, making it competitive for older rendering pipelines and integer-heavy data processing. Its 256.0 GB/s memory bandwidth and integrated Radeon 8060S graphics make it a self-contained mobile solution, though the benchmark data shows it trailing in most server-oriented workloads.

For a mobile workstation that needs CPU horsepower without a discrete GPU, the AMD’s integrated graphics and 55-watt TDP are compelling, but the benchmark results show it losing most compute tests. For a server or workstation where the 180-watt TDP and 80 PCIe Gen 5 lanes are acceptable, the Intel Xeon 638 delivers superior performance in the majority of measured scenarios. The near-identical average scores (80,762 vs 80,723) hide a lopsided win distribution that favors the Intel for most serious compute tasks.

FAQ

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

A: The Intel Xeon 638 scores 6,663 in Cinebench R23 single-core, which is 69.8% higher than the AMD Ryzen AI Max+ PRO 395’s score of 2,012.5.

Q: Does the AMD processor have an integrated GPU?

A: Yes, the AMD Ryzen AI Max+ PRO 395 includes Radeon 8060S integrated graphics, while the Intel Xeon 638 has no integrated graphics (listed as N/A).

Q: What is the memory bandwidth difference between the two?

A: The AMD Ryzen AI Max+ PRO 395 provides 256.0 GB/s memory bandwidth using LPDDR5X, while the Intel Xeon 638 provides 204.8 GB/s using DDR5. Both use quad-channel memory buses.

Q: Which processor wins more benchmark comparisons?

A: The Intel Xeon 638 wins 11 of the 15 head-to-head benchmark comparisons, while the AMD Ryzen AI Max+ PRO 395 wins 4.

Q: Are both processors in the same performance percentile?

A: Yes, both have a percentile score of 95 versus all CPUs, and their average benchmark scores are nearly identical: 80,762 for AMD and 80,723 for Intel.

Q: Do both processors support ECC memory?

A: Yes, both the AMD Ryzen AI Max+ PRO 395 and the Intel Xeon 638 support ECC memory.

Head-to-Head Benchmarks

The biggest win for the Intel Xeon 638 comes in Cinebench R23 single-core, where it delivers 6,663 points versus the AMD’s 2,012.5, a 69.8% advantage. This is an enormous gap that suggests fundamental differences in how each architecture handles the single-threaded rendering workload. The Intel also wins Cinebench R23 multi-core by 25.7%, scoring 47,202 against 35,061, showing that its multi-threaded rendering performance scales better despite identical core and thread counts.

The AMD’s largest victory is in PassMark single-thread, where it scores 4,078 against the Intel’s 3,670, an 11.1% lead. This win is puzzling given the Intel’s dominance in Cinebench single-core, but the PassMark test measures different instruction patterns that apparently favor Zen 5. The AMD also wins Cinebench R15 multi-core by 10.3% (5,247 vs 4,757) and PassMark integer math by 3.2% (190,720 vs 184,884).

The Intel’s wins in PassMark physics (4,704 vs 3,189, a 32.2% lead) and PassMark find prime numbers (381 vs 284, 25.5% lead) highlight its strength in compute-heavy, floating-point-oriented tasks. The Intel also leads in floating-point math by 16.7%, data compression by 11.9%, data encryption by 8.9%, extended instructions by 7.8%, multithread by 7.5%, and random string sorting by 5.6%. The AMD’s only other win besides the three mentioned is its 10.3% margin in Cinebench R15 multi-core, which contrasts sharply with its 25.7% loss in the newer R23 version of the same benchmark.

Specification Differences

The two processors share core and thread counts (16 cores, 32 threads) but diverge in nearly every other specification. The AMD Ryzen AI Max+ PRO 395 has a base clock of 3.00 GHz and boost clock of 5.10 GHz, while the Intel Xeon 638 has a higher base clock of 3.20 GHz but a lower boost clock of 4.80 GHz. The AMD has a 55-watt TDP versus the Intel’s 180-watt TDP.

The process nodes differ: AMD uses 4nm TSMC fabrication, while Intel uses 5nm at its own foundry. The Intel’s die size is listed at 598 mm², while the AMD has no die size listed. Cache configurations differ, with the AMD offering 80 KB L1, 1 MB L2, and 64 MB L3 per core, while the Intel offers 112 KB L1, 2 MB L2, and 72 MB L3 per core.

Memory support differs: AMD uses LPDDR5X with 256.0 GB/s bandwidth, Intel uses DDR5 with 204.8 GB/s bandwidth. PCIe capabilities are dramatically different: AMD provides 16 Gen 4 lanes, Intel provides 80 Gen 5 lanes. The AMD has integrated Radeon 8060S graphics, the Intel has none. The AMD is locked (multiplier not unlocked), while the Intel has an unlocked multiplier. The AMD targets the mobile market segment, the Intel targets server/workstation. The AMD’s release date is 2025-01-05, the Intel’s is 2026-02-01. The Intel has a launch MSRP of $899.