AMD Ryzen 5 PRO 7645 vs AMD Ryzen 9 PRO 6950HS Comparison

FAQ

Q: Which processor is faster in raw multi-threaded rendering workloads?

A: The AMD Ryzen 5 PRO 7645 wins decisively. In Cinebench R23 multi-core, it scores 21,710 versus 11,515 for the Ryzen 9 PRO 6950HS, a lead of 88.5%. Even in Cinebench R15 multi-core, the Ryzen 5 PRO 7645 posts 2,188 against 1,913, a 14.4% advantage.

Q: Does the Ryzen 9 PRO 6950HS ever win any benchmark?

A: Yes, it wins three of the fifteen head-to-head tests. It takes PassMark data encryption (17,837 vs 16,657, a 6.6% lead), floating point math (48,096 vs 45,202, a 6% lead), and integer math (88,124 vs 74,782, a 15.1% lead).

Q: How do their overall average scores compare?

A: The Ryzen 5 PRO 7645 has an average benchmark score of 32,446, placing it in the 83rd percentile of all CPUs. The Ryzen 9 PRO 6950HS averages 31,850, sitting in the 82nd percentile. The 7645's closest rival is the AMD Ryzen AI 7 PRO 360 at 32,662 (0.7% higher), while the 6950HS's closest rival is the Intel Core i5-14400 at 32,115 (0.8% higher).

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

A: The Ryzen 5 PRO 7645 has 6 cores and 12 threads. The Ryzen 9 PRO 6950HS has 8 cores and 16 threads. Despite having fewer cores and threads, the 7645 wins most multi-threaded tests.

Q: Which processor has the higher boost clock?

A: The Ryzen 5 PRO 7645 boosts to 5.10 GHz, while the Ryzen 9 PRO 6950HS boosts to 4.90 GHz. The base clocks are 3.80 GHz for the 7645 and 3.30 GHz for the 6950HS.

Q: What is the difference in power envelope between the two?

A: The Ryzen 5 PRO 7645 has a TDP of 65 watts, while the Ryzen 9 PRO 6950HS has a TDP of 35 watts. The 6950HS is designed for mobile platforms with a lower power target.

Architecture Differences

The AMD Ryzen 5 PRO 7645 and AMD Ryzen 9 PRO 6950HS come from different architectural generations and target different market segments. The 7645 belongs to the 7000 series, using the Zen 4 architecture with the Raphael codename, built on TSMC's 5 nm process. The 6950HS is part of the 6000 series, using the Zen 3+ architecture with the Rembrandt codename, manufactured on a 6 nm node.

The transistor counts and die sizes reflect this generational gap. The 7645 packs 6,570 million transistors into a 71 mm² die. The 6950HS does not have a recorded transistor count in the database, but its die size is 208 mm², substantially larger. This smaller, denser design for the 7645 contributes to its higher clock speeds and efficiency in specific workloads.

Cache configurations differ significantly. Both share a 64 KB L1 cache per core, but the L2 cache is 1 MB per core on the 7645 versus 512 KB per core on the 6950HS. L3 cache also diverges: the 7645 has 32 MB shared, while the 6950HS has 16 MB shared. The larger cache hierarchy on the 7645 helps explain its advantage in latency-sensitive and multi-threaded tasks.

Memory support is similar in type: both support DDR5 with dual-channel memory buses. However, the 7645 has a higher theoretical memory bandwidth of 83.2 GB/s compared to 76.8 GB/s for the 6950HS. ECC memory support is another differentiator, present on the 7645 but absent on the 6950HS.

PCIe connectivity also differs. The 7645 offers Gen 5 with 24 lanes (CPU only), while the 6950HS provides Gen 4 with 20 lanes (CPU only). This gives the 7645 a more modern and wider I/O interface.

Integrated graphics vary as well. The 7645 includes Radeon Graphics, while the 6950HS includes the Radeon 680M. The 6950HS's integrated GPU is generally positioned for more capable mobile graphics, but the database does not include direct graphics benchmarks for either.

The sockets are incompatible: the 7645 uses AMD Socket AM5, while the 6950HS uses AMD Socket FP7. The 7645 targets the Server/Workstation segment, whereas the 6950HS is a Mobile part. Both are active production parts, with the 7645 released in June 2023 and the 6950HS released in April 2022.

Head-to-Head Benchmarks

The head-to-head data shows a dominant performance profile for the Ryzen 5 PRO 7645, winning 12 of 15 tests. The most striking margin is in Cinebench R23 single-core, where the 7645 scores 3,065 versus 1,514 for the 6950HS, a 102.4% advantage. This is a massive generational uplift in single-threaded performance, driven by the Zen 4 architecture and higher clocks.

PassMark find prime numbers is another extreme outlier. The 7645 scores 198 against 56 for the 6950HS, a 253.6% lead. This workload heavily favors the newer core design and larger cache. Physics simulation also shows a strong gap: 1,598 versus 1,043, a 53.2% win for the 7645.

Multi-threaded Cinebench R23 is the biggest overall win for the 7645, with an 88.5% lead (21,710 vs 11,515). This is notable because the 6950HS has more cores (8 vs 6) and more threads (16 vs 12). The per-core efficiency of Zen 4 over Zen 3+ more than compensates for the core count deficit.

In Cinebench R15, the 7645 leads by 14.4% in multi-core (2,188 vs 1,913) and by 28.9% in single-core (308 vs 239). The single-core gap in R15 is significant but smaller than in R23, indicating that the newer benchmark scales more aggressively with the architectural improvements.

PassMark multi-thread gives the 7645 an 11.9% win (25,489 vs 22,775). Random string sorting goes to the 7645 by 17.7% (34,557 vs 29,350). Extended instructions favor the 7645 by 15.4% (21,813 vs 18,897). Data compression is close, with the 7645 winning by just 1.3% (286,298 vs 282,624).

The Ryzen 9 PRO 6950HS takes three wins, all in PassMark workloads. Its biggest win is integer math, where it scores 88,124 versus 74,782, a 15.1% margin. Floating point math goes its way by 6% (48,096 vs 45,202). Data encryption is a 6.6% win (17,837 vs 16,657). These wins suggest the 6950HS has a wider execution engine for certain arithmetic operations, despite the older architecture.

Single-thread PassMark scores are closer: the 7645 leads with 3,652 versus 3,400, a 7.4% margin. This is a more modest single-core advantage than Cinebench suggests, but still consistent.

Specification Differences

| Specification | AMD Ryzen 5 PRO 7645 | AMD Ryzen 9 PRO 6950HS |

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

| Series | 7000 series | 6000 series |

| Cores | 6 | 8 |

| Threads | 12 | 16 |

| Base Clock | 3.80 GHz | 3.30 GHz |

| Boost Clock | 5.10 GHz | 4.90 GHz |

| TDP | 65 W | 35 W |

| Socket | AMD Socket AM5 | AMD Socket FP7 |

| Architecture | Zen 4 | Zen 3+ |

| Codename | Raphael | Rembrandt |

| Process Node | 5 nm | 6 nm |

| Die Size | 71 mm² | 208 mm² |

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

| L3 Cache | 32 MB (shared) | 16 MB (shared) |

| Memory Bandwidth | 83.2 GB/s | 76.8 GB/s |

| ECC Memory | Yes | No |

| PCIe | Gen 5, 24 Lanes | Gen 4, 20 Lanes |

| Integrated Graphics | Radeon Graphics | Radeon 680M |

| Market Segment | Server/Workstation | Mobile |

| Release Date | 2023-06-12 | 2022-04-18 |

The Verdict

The data paints a clear picture: the AMD Ryzen 5 PRO 7645 is the faster processor in nearly every measurable workload, despite having fewer cores and threads. Its architecture advantage is overwhelming in Cinebench R23 multi-core (88.5% ahead) and single-core (102.4% ahead). For users running rendering, physics simulation, or general productivity workloads, the 7645 is the superior choice.

The Ryzen 9 PRO 6950HS retains value in specific scenarios. Its wins in integer math, floating point math, and data encryption indicate that certain numerical workloads still favor its wider execution resources. Additionally, its 35 W TDP makes it a more appropriate fit for thin-and-light mobile designs, where the 7645's 65 W envelope would be harder to cool and power.

The 7645's higher memory bandwidth (83.2 GB/s vs 76.8 GB/s), larger L3 cache (32 MB vs 16 MB), and ECC support make it better suited for workstation and server duties. The 6950HS, with its Radeon 680M integrated graphics and mobile socket, targets portable systems where power efficiency is prioritized over peak performance.

For a desktop or workstation build requiring maximum throughput and modern I/O (PCIe Gen 5), the Ryzen 5 PRO 7645 is the clear pick. For a mobile workstation or ultrabook where battery life and thermals matter more than raw compute, the Ryzen 9 PRO 6950HS remains a reasonable option, especially given its 8-core configuration and lower power draw. The benchmark data, however, does not mince words: the 7645 wins 12 of 15 head-to-head tests, and its average score is 32,446 versus 31,850 for the 6950HS.