AMD EPYC 4345P vs AMD Ryzen AI Max PRO 380 Comparison

The AMD EPYC 4345P and the AMD Ryzen AI Max PRO 380 are both built on the Zen 5 architecture, yet they serve fundamentally different market segments. The EPYC 4345P is a server/workstation processor aimed at high-throughput computing, while the Ryzen AI Max PRO 380 is a mobile part designed for efficiency. Benchmark results confirm this split, with the EPYC 4345P dominating the head-to-head comparisons across every single workload tested, securing 11 wins out of 11 benchmarks. The data reveals a clear performance hierarchy, but the magnitude of the differences varies dramatically depending on the specific task, from a modest single-thread advantage to a massive lead in physics simulations.

Head-to-Head Benchmarks

The most striking results come from the PassMark physics and prime number tests, where the EPYC 4345P's lead is enormous. In the `passmark_physics` test, the EPYC 4345P scores 2583 against the Ryzen AI Max PRO 380's 1120, a delta of 130.6%. Similarly, in `passmark_find_prime_numbers`, the EPYC 4345P scores 167 versus 75, which translates to a 122.7% advantage. These are not incremental gains; they represent a fundamental difference in raw computational throughput, likely reflecting the EPYC's higher core count and boost clock of 5.50 GHz compared to 4.90 GHz.

The EPYC 4345P also shows a substantial lead in integer and floating-point math workloads. In `passmark_integer_math`, the score is 123774 for the EPYC versus 79789 for the Ryzen AI Max PRO 380, a 55.1% difference. Floating-point performance follows a similar pattern, with the EPYC scoring 74255 and the mobile chip scoring 53084, a 39.9% gap. These results indicate that the EPYC is better suited for compute-intensive tasks that rely heavily on arithmetic operations, such as scientific simulations and data processing.

Memory-sensitive workloads also favor the EPYC 4345P, albeit to a lesser degree than the math tests. The `passmark_data_compression` test shows the EPYC at 421490 and the Ryzen AI Max PRO 380 at 293595, a 43.6% delta. Data encryption follows with a 60.8% advantage for the EPYC (23313 vs 14502). The `passmark_random_string_sorting` benchmark, which is often memory-latency bound, sees the EPYC win by 48.4% (46238 vs 31153). While the Ryzen AI Max PRO 380 has a higher memory bandwidth (128.0 GB/s vs 89.6 GB/s), the EPYC's larger shared L3 cache (32 MB vs 16 MB) and higher core count appear to be more decisive factors in these tests.

The only benchmark where the gap narrows significantly is the single-thread test. In `passmark_single_thread`, the EPYC 4345P scores 4408, while the Ryzen AI Max PRO 380 scores 3995. This 10.3% delta is the smallest of the entire comparison, but it still unequivocally favors the EPYC. The EPYC's higher boost clock of 5.50 GHz over the Ryzen's 4.90 GHz provides a clear advantage even when only one core is active. The multi-threaded test, `passmark_multithread`, reflects the core count difference, with the EPYC's 8 cores and 16 threads scoring 36123 versus the Ryzen's 6 cores and 12 threads at 24244, a 49% difference.

Overall, the average benchmark score for the EPYC 4345P is 48470, placing it at the 90th percentile among all CPUs. Its nearest rival, the Intel Core i5-14600K, has an average score of 48618, making the EPYC 0.3% slower in that specific comparison. Conversely, the Ryzen AI Max PRO 380 has an average score of 48171, also at the 90th percentile. Its deltas against rivals are tighter, with a 0.1% deficit to the Intel Core Ultra 5 235A and a 0.5% advantage over the AMD Ryzen 9 3900. The data confirms that while both chips sit in the same overall performance tier, the EPYC 4345P is consistently faster in every head-to-head metric.

Architecture Differences

The most fundamental architectural difference lies in the core configuration. The AMD EPYC 4345P is an 8-core, 16-thread processor, while the AMD Ryzen AI Max PRO 380 is a 6-core, 12-thread part. This 2-core and 4-thread advantage for the EPYC is the primary driver behind its multi-threaded performance wins, particularly in the physics and integer math tests. Both processors use a 4 nm process node from TSMC, but the EPYC has a transistor count of 8,315 million on a 70.6 mm² die, whereas the Ryzen AI Max PRO 380 has no listed transistor or die size data.

The cache hierarchy differs significantly between the two. Both share an L1 cache of 80 KB per core and an L2 cache of 1 MB per core. However, the EPYC 4345P has 32 MB of shared L3 cache, while the Ryzen AI Max PRO 380 has only 16 MB. This doubled L3 capacity is a critical advantage for the EPYC in workloads that require frequent access to a large working set, such as data compression and random string sorting, where the deltaPct was 43.6% and 48.4% respectively.

Memory support is another major divergence. The EPYC 4345P supports DDR5 memory over a dual-channel bus, providing a memory bandwidth of 89.6 GB/s. In contrast, the Ryzen AI Max PRO 380 uses LPDDR5X memory, also dual-channel, but with a higher bandwidth of 128.0 GB/s. Despite the Ryzen's superior bandwidth on paper, the EPYC's larger cache and higher core count compensate, leading to wins in memory-related benchmarks. Both processors support ECC memory, which is a key feature for the EPYC's server target market.

The PCIe interface and socket types are also distinct. The EPYC 4345P uses AMD Socket AM5 and provides PCIe Gen 5 with 24 lanes (CPU only). The Ryzen AI Max PRO 380 uses AMD Socket FP11 and offers PCIe Gen 4 with 16 lanes (CPU only). This makes the EPYC more suitable for high-bandwidth expansion cards, while the Ryzen is designed for a more compact mobile platform. The integrated graphics also differ, with the EPYC featuring Radeon Graphics and the Ryzen AI Max PRO 380 featuring Radeon 8040S, though no benchmark data is provided for either iGPU.

The Verdict

From a pure performance standpoint, the data unequivocally favors the AMD EPYC 4345P. It wins every single benchmark in the head-to-head comparison, with advantages ranging from 10.3% in single-thread to 130.6% in physics. For any workload that requires maximum compute throughput—whether it is server-side data processing, scientific computing, or heavy multi-threaded applications—the EPYC 4345P is the superior choice. Its higher core count, larger L3 cache, and higher boost clock make it a dominant force in the PassMark tests, as evidenced by its 11 wins out of 11 head-to-head benchmarks.

The Ryzen AI Max PRO 380, while slower in every direct comparison, is not without merit. Its average benchmark score of 48171 places it in the same 90th percentile as the EPYC, and its nearest rivals include the AMD Ryzen 9 7900X3D, which it beats by 0.5%. The data suggests that the Ryzen AI Max PRO 380 is a highly capable processor in its own right, but it is designed for a different form factor and power envelope. With a TDP of 55 watts and a mobile socket (FP11), it is optimized for laptops and compact systems where the EPYC's 65-watt TDP and AM5 platform are less practical.

The choice between these two processors comes down to the target platform and workload priorities. If the primary requirement is raw server-grade performance in a workstation or rack-mounted system, the EPYC 4345P is the clear winner based on the benchmark data. If the requirement is a mobile processor that still delivers strong performance relative to its competition, the Ryzen AI Max PRO 380 is a solid option, even though it loses to the EPYC in every measured category. There is no scenario in the provided data where the Ryzen AI Max PRO 380 outperforms the EPYC 4345P.

Specification Differences

• Cores: AMD EPYC 4345P has 8 cores; AMD Ryzen AI Max PRO 380 has 6 cores.
• Threads: AMD EPYC 4345P has 16 threads; AMD Ryzen AI Max PRO 380 has 12 threads.
• Base Clock: AMD EPYC 4345P has a base clock of 3.80 GHz; AMD Ryzen AI Max PRO 380 has a base clock of 3.60 GHz.
• Boost Clock: AMD EPYC 4345P has a boost clock of 5.50 GHz; AMD Ryzen AI Max PRO 380 has a boost clock of 4.90 GHz.
• TDP: AMD EPYC 4345P has a TDP of 65 watts; AMD Ryzen AI Max PRO 380 has a TDP of 55 watts.
• Socket: AMD EPYC 4345P uses AMD Socket AM5; AMD Ryzen AI Max PRO 380 uses AMD Socket FP11.
• L3 Cache: AMD EPYC 4345P has 32 MB shared; AMD Ryzen AI Max PRO 380 has 16 MB shared.
• Memory Support: AMD EPYC 4345P supports DDR5; AMD Ryzen AI Max PRO 380 supports LPDDR5X.
• Memory Bandwidth: AMD EPYC 4345P has 89.6 GB/s; AMD Ryzen AI Max PRO 380 has 128.0 GB/s.
• PCIe: AMD EPYC 4345P has Gen 5 with 24 lanes; AMD Ryzen AI Max PRO 380 has Gen 4 with 16 lanes.
• Integrated Graphics: AMD EPYC 4345P has Radeon Graphics; AMD Ryzen AI Max PRO 380 has Radeon 8040S.
• Codename: AMD EPYC 4345P is Grado; AMD Ryzen AI Max PRO 380 is Strix Halo.
• Transistors: AMD EPYC 4345P has 8,315 million; AMD Ryzen AI Max PRO 380 has no listed data.
• Die Size: AMD EPYC 4345P is 70.6 mm²; AMD Ryzen AI Max PRO 380 has no listed data.

FAQ

Q: Which processor wins in the passmark_multithread benchmark?

A: The AMD EPYC 4345P wins with a score of 36123, which is 49% higher than the AMD Ryzen AI Max PRO 380's score of 24244.

Q: How large is the single-thread performance gap?

A: The AMD EPYC 4345P scores 4408 in the passmark_single_thread test, while the AMD Ryzen AI Max PRO 380 scores 3995, resulting in a 10.3% advantage for the EPYC.

Q: Is the AMD Ryzen AI Max PRO 380 competitive with other CPUs?

A: Yes, its average benchmark score of 48171 places it at the 90th percentile, and it outperforms the AMD Ryzen 9 7900X3D by 0.5% and the AMD Ryzen 9 3900 by 0.5%.

Q: Which processor has a larger L3 cache?

A: The AMD EPYC 4345P has a shared L3 cache of 32 MB, while the AMD Ryzen AI Max PRO 380 has a shared L3 cache of 16 MB.

Q: Do both processors support ECC memory?

A: Yes, both the AMD EPYC 4345P and the AMD Ryzen AI Max PRO 380 have ECC memory support listed in their specifications.

Q: What is the difference in memory bandwidth?

A: The AMD Ryzen AI Max PRO 380 has a higher memory bandwidth of 128.0 GB/s, while the AMD EPYC 4345P has a memory bandwidth of 89.6 GB/s.