AMD EPYC 7443P vs AMD Ryzen 9 8945HX Comparison

FAQ

Q: Which processor has the higher average benchmark score?

A: The AMD EPYC 7443P records an average benchmark score of 81,661, while the AMD Ryzen 9 8945HX scores 76,212. The EPYC lands in the 96th percentile of all CPUs, with the Ryzen 9 one point behind at the 95th percentile.

Q: How do the two processors compare in multi-core rendering performance?

A: The EPYC 7443P leads in every Cinebench multi-core test. In Cinebench R23 multi-core, it scores 48,433 versus 42,713 for the Ryzen 9 8945HX, a 13.4% advantage. The same margin holds in R20 (20,341 vs 17,939) and R15 (4,881 vs 4,305).

Q: Is the Ryzen 9 8945HX faster in any benchmark?

A: Yes. The Ryzen 9 8945HX wins in single-threaded PassMark tests with 3,907 points versus 2,907 for the EPYC, a 25.6% advantage. It also edges out the EPYC in PassMark extended instructions (49,823 vs 48,213, a 3.2% difference).

Q: What are the core and thread counts for each processor?

A: The EPYC 7443P has 24 cores and 48 threads. The Ryzen 9 8945HX has 16 cores and 32 threads.

Q: Which processor supports ECC memory?

A: The EPYC 7443P supports ECC memory. The Ryzen 9 8945HX does not.

Q: Do these processors use the same memory type?

A: No. The EPYC 7443P uses DDR4 memory with an eight-channel bus and 204.8 GB/s bandwidth. The Ryzen 9 8945HX uses DDR5 memory with a dual-channel bus and 83.2 GB/s bandwidth.

Architecture Differences

The two processors come from different AMD generations and target different market segments. The EPYC 7443P is built on Zen 3 architecture (codename Milan) and belongs to the EPYC 7003 series for servers and workstations. The Ryzen 9 8945HX uses Zen 4 architecture (codename Dragon Range) and is part of the 8000 series for mobile platforms.

The manufacturing process differs significantly. The EPYC 7443P uses TSMC's 7 nm node, while the Ryzen 9 8945HX uses the newer 5 nm node. Despite the smaller process, the EPYC packs more transistors: 16,600 million across a die size of 4x 81 mm². The Ryzen 9 has 13,140 million transistors on a 2x 71 mm² die.

Core and cache configurations show clear design priorities. The EPYC provides 24 cores and 48 threads, with 64 KB L1 and 512 KB L2 per core, plus a shared 128 MB L3 cache. The Ryzen 9 offers 16 cores and 32 threads, with 64 KB L1 and a larger 1 MB L2 per core, but a smaller 64 MB shared L3 cache.

Clock speeds favor the mobile chip. The Ryzen 9 8945HX boosts to 5.40 GHz with a 2.50 GHz base clock. The EPYC 7443P boosts to 4.00 GHz with a 2.85 GHz base clock. The Ryzen 9 also has an unlocked multiplier, while the EPYC does not.

Platform and I/O capabilities diverge sharply. The EPYC sits in AMD Socket SP3 with 128 PCIe Gen 4 lanes (CPU only), while the Ryzen 9 uses AMD Socket FL1 with 28 PCIe Gen 5 lanes (CPU only). The EPYC supports eight-channel DDR4 memory and ECC, while the Ryzen 9 uses dual-channel DDR5 without ECC. The Ryzen 9 integrates a Radeon 610M GPU, whereas the EPYC has no integrated graphics.

Power envelopes reflect their roles. The EPYC 7443P has a 200 W TDP, while the Ryzen 9 8945HX draws 55 W. The EPYC launched on 2021-03-14 with a launch MSRP of $1337, while the Ryzen 9 arrived later on 2025-04-22.

Head-to-Head Benchmarks

The recorded benchmark data shows the EPYC 7443P winning 14 of 17 direct comparisons, with the Ryzen 9 8945HX taking three. The margins tell a nuanced story about workload types.

In Cinebench tests, the EPYC maintains a consistent lead across all six runs. Single-core and multi-core results both show a 13.4% to 13.5% advantage. The R23 multi-core score of 48,433 versus 42,713, and the R23 single-core score of 6,837 versus 6,030, both favor the EPYC by roughly the same proportion. This consistency suggests the EPYC's higher base clock and larger core count combine to deliver broadly superior rendering performance.

PassMark integer and floating-point math tests reinforce the EPYC's dominance. In integer math, the EPYC scores 232,632 versus 195,180, a 19.2% margin. Floating-point math shows a smaller but still clear lead: 129,932 versus 117,453, a 10.6% difference. Data compression favors the EPYC by 21.1% (820,859 vs 677,755), and random string sorting follows at 21.3% (95,581 vs 78,781).

The largest single-test gap appears in PassMark physics. The EPYC scores 4,748 versus 2,168 for the Ryzen 9, a 119% difference. This result likely reflects the EPYC's 24-core configuration versus the Ryzen 9's 16 cores. Prime number finding also shows a wide margin: 410 versus 262, a 56.5% advantage for the EPYC. Data encryption scores 57,263 versus 40,836, a 40.2% lead.

The Ryzen 9 8945HX secures its wins in areas tied to newer architecture. PassMark single-thread performance shows 3,907 versus 2,907, a 25.6% advantage for the Ryzen 9. Extended instructions also go to the Ryzen 9, with 49,823 versus 48,213, a 3.2% edge. These results align with the Ryzen 9's higher boost clock and newer Zen 4 core design.

The multi-thread PassMark result narrows the overall picture. The EPYC scores 56,981 versus 51,405, a 10.8% margin that is smaller than the core count difference might suggest. This indicates the Ryzen 9's per-core efficiency partially offsets its lower core count.

The Verdict

The data points to a clear split based on workload and platform requirements. The EPYC 7443P is the stronger processor for multi-threaded, server-class workloads. It wins 14 benchmarks outright, including every Cinebench test, all major PassMark compute tests, and the physics simulation. Its 24 cores, 48 threads, and 128 MB L3 cache deliver decisive advantages in rendering, encryption, compression, and mathematical workloads. The 119% margin in physics and 56.5% margin in prime number finding show where core count matters most.

The Ryzen 9 8945HX is the better choice for single-threaded responsiveness and workloads that benefit from the newest instruction set extensions. Its 25.6% lead in PassMark single-thread performance and 3.2% edge in extended instructions demonstrate that Zen 4's architectural improvements translate into real wins. The higher boost clock of 5.40 GHz gives it an edge in latency-sensitive tasks.

For buyers building a server or workstation with Socket SP3, ECC memory support, and eight-channel DDR4 bandwidth, the EPYC 7443P is the logical option. The Ryzen 9 8945HX suits mobile platforms where the 55 W TDP, integrated Radeon 610M graphics, and PCIe Gen 5 support matter more than raw multi-core throughput. The EPYC's launch MSRP of $1337 reflects its server positioning, while the Ryzen 9's mobile market segment aligns with its lower power envelope and unlocked multiplier.

Specification Differences

| Specification | AMD EPYC 7443P | AMD Ryzen 9 8945HX |

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

| Cores | 24 | 16 |

| Threads | 48 | 32 |

| Base Clock | 2.85 GHz | 2.50 GHz |

| Boost Clock | 4.00 GHz | 5.40 GHz |

| TDP | 200 W | 55 W |

| Socket | AMD Socket SP3 | AMD Socket FL1 |

| Architecture | Zen 3 | Zen 4 |

| Codename | Milan | Dragon Range |

| Process Node | 7 nm | 5 nm |

| Foundry | TSMC | TSMC |

| Transistors | 16,600 million | 13,140 million |

| Die Size | 4x 81 mm² | 2x 71 mm² |

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

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

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

| Memory Support | DDR4 | DDR5 |

| Memory Bus | Eight-channel | Dual-channel |

| Memory Bandwidth | 204.8 GB/s | 83.2 GB/s |

| ECC Memory | Yes | No |

| PCIe | Gen 4, 128 Lanes (CPU only) | Gen 5, 28 Lanes (CPU only) |

| Integrated Graphics | None | Radeon 610M |

| Market Segment | Server/Workstation | Mobile |

| Release Date | 2021-03-14 | 2025-04-22 |

| Multiplier Unlocked | No | Yes |

| Part Number | 100-000000342100-100000342WOF | 100-000001848 |

Where Each One Wins

The EPYC 7443P dominates in multi-threaded compute and server-oriented tasks. Its wins span Cinebench R15, R20, and R23 in both single and multi-core modes, with consistent 13.4% to 13.5% leads. PassMark results show strengths in data compression (21.1% ahead), data encryption (40.2% ahead), integer math (19.2% ahead), floating-point math (10.6% ahead), multi-thread workloads (10.8% ahead), physics (119% ahead), prime number finding (56.5% ahead), and random string sorting (21.3% ahead). These benchmarks point to use cases in server virtualization, database processing, scientific computing, and rendering farms where core count and cache size drive performance.

The Ryzen 9 8945HX wins in single-threaded PassMark tests and extended instruction workloads. Its single-thread score of 3,907 versus 2,907 represents a 25.6% advantage, making it the better fit for interactive applications, front-end development, and tasks where individual core speed matters. The 3.2% lead in extended instructions (49,823 vs 48,213) suggests an edge in workloads using newer SIMD or cryptographic instruction sets, which aligns with its Zen 4 architecture and higher boost clock.

The platform differences reinforce the workload split. The EPYC's eight-channel DDR4 memory with 204.8 GB/s bandwidth and 128 PCIe Gen 4 lanes support memory-intensive server applications and high-throughput I/O. The Ryzen 9's dual-channel DDR5 with 83.2 GB/s bandwidth and 28 PCIe Gen 5 lanes fit mobile systems where power and space are constrained. The Ryzen 9's integrated Radeon 610M GPU provides display output capability, while the EPYC requires a separate graphics solution. ECC memory support on the EPYC targets reliability-critical environments, while the Ryzen 9's unlocked multiplier appeals to enthusiasts seeking overclocking headroom.