AMD EPYC 7443P vs AMD Ryzen AI Max+ 395 Comparison

Head-to-Head Benchmarks

The head-to-head data reveals a split personality between these two processors. The AMD EPYC 7443P wins 11 of the 17 recorded comparisons, while the AMD Ryzen AI Max+ 395 takes 6. But raw win counts do not tell the whole story. The magnitude of each victory matters far more.

The EPYC 7443P posts its most dramatic win in Cinebench R23 single-core, scoring 6837 against the Ryzen AI Max+ 395's 2044, a 234.5% advantage. That is an enormous gap for a single-threaded test. The Cinebench R15 single-core result shows a similar pattern, with the EPYC scoring 689 versus 316, a 118% delta. These results are surprising for a server part, as single-core performance typically favors newer client architectures.

In multi-threaded Cinebench R23, the EPYC 7443P again leads, scoring 48433 against 35314, a 37.1% margin. The EPYC's 24 cores and 48 threads clearly provide more sustained all-core rendering throughput than the Ryzen's 16 cores and 32 threads. The data encryption test shows a 61.5% advantage for the EPYC (57263 vs 35455), and data compression favors it by 18.9% (820859 vs 690650). Integer math also goes to the EPYC by 15.9% (232632 vs 200665).

However, the Ryzen AI Max+ 395 strikes back hard in several key areas. Geekbench multi-core shows the Ryzen at 20992 versus 13400, a 36.2% lead for the mobile chip. Geekbench single-core similarly favors the Ryzen, 2464 versus 1672, a 32.1% margin. PassMark single-thread also goes to the Ryzen, 4147 versus 2907, a 29.9% advantage. The extended instructions test shows a 14.4% Ryzen lead (56346 vs 48213).

The Cinebench R15 multi-core result is the most confusing: the Ryzen wins 5463 versus 4881, a 10.7% margin, despite losing Cinebench R23 multi-core by 37.1%. This inconsistency suggests different workload scaling characteristics, possibly related to memory bandwidth or power delivery. The Ryzen also takes passMark floating-point math nearly evenly, with the EPYC leading by just 1% (129932 vs 128682).

The closeness of several tests matters. PassMark multithread shows the EPYC ahead by only 3.7% (56981 vs 54934). Physics simulation favors the EPYC by 36.4% (4748 vs 3481), and prime number finding goes to the EPYC by 35.3% (410 vs 303). Random string sorting favors the EPYC by 25.5% (95581 vs 76177).

Architecture Differences

The architectural gap between these two AMD processors is vast. The EPYC 7443P uses Zen 3 architecture on the Milan codename, built on TSMC's 7 nm process. The Ryzen AI Max+ 395 uses Zen 5 architecture on the Strix Halo codename, built on TSMC's 4 nm process. This process node difference of 7 nm versus 4 nm explains much of the efficiency and clock speed disparity.

The EPYC packs 24 cores and 48 threads into an AMD Socket SP3 package, with a base clock of 2.85 GHz and boost clock of 4.00 GHz. The Ryzen offers 16 cores and 32 threads on AMD Socket FP11, with higher clocks: 3.00 GHz base and 5.10 GHz boost. The Ryzen's boost clock is 1.10 GHz higher, which directly contributes to its single-thread wins.

Cache configurations differ substantially. The EPYC provides 64 KB L1 per core, 512 KB L2 per core, and 128 MB shared L3. The Ryzen offers 80 KB L1 per core, 1 MB L2 per core, and 64 MB shared L3. The EPYC's 128 MB L3 is double the Ryzen's 64 MB, which helps server workloads that need large working sets. The Ryzen's larger per-core L1 and L2 caches (80 KB and 1 MB versus 64 KB and 512 KB) support its higher single-core performance.

Memory architecture shows another major split. The EPYC supports DDR4 across an eight-channel memory bus, delivering 204.8 GB/s bandwidth. The Ryzen supports LPDDR5X across a quad-channel bus, delivering 256.0 GB/s. Despite fewer channels, the Ryzen's faster LPDDR5X memory provides 25% more bandwidth. Both support ECC memory, which is notable for a mobile chip.

PCIe lanes differ dramatically: the EPYC provides 128 Gen 4 lanes, while the Ryzen provides only 16 Gen 4 lanes. This makes the EPYC suitable for massive I/O expansion, while the Ryzen's lane count aligns with mobile integration. The Ryzen includes integrated Radeon 8060S graphics, while the EPYC has no integrated graphics. Die size and transistor count also differ: the EPYC uses 16,600 million transistors across 4x 81 mm² dies, while the Ryzen uses 2x 70.6 mm² dies with transistor count not recorded.

Where Each One Wins

The EPYC 7443P dominates in server and workstation workloads. Its 128 MB L3 cache and eight-channel DDR4 memory support large datasets. Data encryption (61.5% lead) and data compression (18.9% lead) are classic server tasks. Integer math (15.9% lead) and random string sorting (25.5% lead) also favor the EPYC. The physics simulation test (36.4% lead) and prime number finding (35.3% lead) suggest strong computational throughput for scientific workloads. The EPYC's 128 PCIe lanes enable massive storage arrays and GPU clusters.

The Ryzen AI Max+ 395 wins in client-side, single-thread-heavy scenarios. Geekbench multi-core (36.2% lead) and single-core (32.1% lead) indicate responsiveness in everyday applications. PassMark single-thread (29.9% lead) confirms this. The extended instructions test (14.4% lead) shows strength in modern instruction sets. Its higher boost clock (5.10 GHz versus 4.00 GHz) and newer Zen 5 architecture drive these wins. The integrated Radeon 8060S graphics make it a complete mobile solution without a discrete GPU.

The Cinebench R15 multi-core result (10.7% Ryzen lead) remains an outlier, possibly reflecting shorter-duration boost behavior. The Ryzen's 55 W TDP versus the EPYC's 200 W TDP indicates dramatic efficiency differences, though the database does not record direct power efficiency metrics.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 7443P has 24 cores and 48 threads, while the AMD Ryzen AI Max+ 395 has 16 cores and 32 threads.

Q: Why does the EPYC win Cinebench R23 multi-core but lose Cinebench R15 multi-core?

A: The recorded data shows the EPYC leads Cinebench R23 multi-core by 37.1% (48433 vs 35314), but the Ryzen leads Cinebench R15 multi-core by 10.7% (5463 vs 4881). This likely reflects workload duration and power scaling differences, though the database does not specify the exact cause.

Q: Which processor has higher memory bandwidth?

A: The Ryzen AI Max+ 395 provides 256.0 GB/s bandwidth with quad-channel LPDDR5X, while the EPYC 7443P provides 204.8 GB/s with eight-channel DDR4.

Q: Do both processors support ECC memory?

A: Yes, both the EPYC 7443P and the Ryzen AI Max+ 395 support ECC memory according to the recorded specifications.

Q: Which processor has integrated graphics?

A: The Ryzen AI Max+ 395 includes Radeon 8060S integrated graphics. The EPYC 7443P has no integrated graphics.

Q: What are the process nodes for each processor?

A: The EPYC 7443P uses TSMC's 7 nm process, while the Ryzen AI Max+ 395 uses TSMC's 4 nm process.

The Verdict

The data points to a clear split: the EPYC 7443P is the choice for sustained multi-threaded server workloads, while the Ryzen AI Max+ 395 fits mobile and client scenarios. The EPYC's 11 benchmark wins include the largest margins (234.5% in Cinebench R23 single-core, 61.5% in data encryption). Its 128 MB L3 cache and 128 PCIe lanes support server deployments. The Ryzen's 6 wins are concentrated in single-thread and Geekbench tests, with the largest margin being 36.2% in Geekbench multi-core. Its 5.10 GHz boost clock and 55 W TDP make it suitable for power-constrained environments.

The EPYC's 96th percentile versus all CPUs, compared to the Ryzen's 95th percentile, places both in elite performance territory. The average benchmark score for the EPYC is 81661, while the Ryzen scores 77740. The nearest rival for the EPYC is the Intel Core i9-14900KS at 81127 (0.7% delta), and for the Ryzen it is the Intel Core i9-14900K at 79097 (-1.7% delta). These figures confirm both processors operate at the top of the performance spectrum.

Users requiring massive parallel throughput, large L3 caches, or extensive PCIe expansion should select the EPYC 7443P. Users prioritizing single-thread responsiveness, higher memory bandwidth per watt, or integrated graphics should select the Ryzen AI Max+ 395. The launch MSRP for the EPYC 7443P is $1337; the Ryzen's launch MSRP is not recorded.

Specification Differences

| Specification | AMD EPYC 7443P | AMD Ryzen AI Max+ 395 |

|---|---|---|

| Cores | 24 | 16 |

| Threads | 48 | 32 |

| Base Clock | 2.85 GHz | 3.00 GHz |

| Boost Clock | 4.00 GHz | 5.10 GHz |

| TDP | 200 W | 55 W |

| Socket | AMD Socket SP3 | AMD Socket FP11 |

| Architecture | Zen 3 | Zen 5 |

| Codename | Milan | Strix Halo |

| Process Node | 7 nm (TSMC) | 4 nm (TSMC) |

| Die Size | 4x 81 mm² | 2x 70.6 mm² |

| Transistors | 16,600 million | Not recorded |

| L1 Cache | 64 KB (per core) | 80 KB (per core) |

| L2 Cache | 512 KB (per core) | 1 MB (per core) |

| L3 Cache | 128 MB (shared) | 64 MB (shared) |

| Memory Support | DDR4 | LPDDR5X |

| Memory Bus | Eight-channel | Quad-channel |

| Memory Bandwidth | 204.8 GB/s | 256.0 GB/s |

| PCIe | Gen 4, 128 Lanes | Gen 4, 16 Lanes |

| Integrated Graphics | None | Radeon 8060S |

| Market Segment | Server/Workstation | Mobile |

| Release Date | 2021-03-14 | 2025-01-05 |

| Launch MSRP | $1337 | Not recorded |

| Part Number | 100-000000342100-100000342WOF | 100-000001099 |