AMD Ryzen 5 PRO 5655GE vs AMD Ryzen 9 6900HX Comparison

Head-to-Head Benchmarks

The head-to-head data presents a clear split between the AMD Ryzen 9 6900HX and the AMD Ryzen 5 PRO 5655GE. Out of 15 shared benchmark tests, the Ryzen 9 6900HX wins 13, while the Ryzen 5 PRO 5655GE takes only 2. The most lopsided result is in Passmark physics, where the Ryzen 9 6900HX scores 1153 against 648, a 77.9% advantage. This is the largest single-test margin in either direction and reflects a substantial difference in multi-threaded compute behavior.

In Cinebench R15 multicore, the Ryzen 9 6900HX posts 2231 versus 1562, a 42.8% lead. The single-core R15 result also favors the Ryzen 9 6900HX, 249 to 220, a 13.2% edge. These wins align with the Ryzen 9 6900HX's higher boost clock of 4.90 GHz and its 8-core, 16-thread configuration.

However, the Ryzen 5 PRO 5655GE strikes back decisively in Cinebench R23. It scores 15504 multicore against 13497 for the Ryzen 9 6900HX, a 12.9% advantage. The single-core R23 gap is even larger: 2188 versus 1558, a 28.8% lead for the Ryzen 5 PRO. This is a notable reversal, as the R23 workload appears to favor the newer Zen 3 architecture of the Ryzen 5 PRO in ways that R15 does not. The single-core R23 delta is the second-largest margin in the entire comparison.

Across the Passmark suite, the Ryzen 9 6900HX dominates consistently. Data compression shows 306184 versus 228037, a 34.3% win. Encryption follows at 19118 versus 14509, a 31.8% edge. Extended instructions come in at 20849 versus 15714, a 32.7% margin. Prime number finding scores 63 versus 49, a 28.6% lead. Floating point math shows 49981 versus 38204, a 30.8% advantage. Integer math posts 89388 versus 67582, a 32.3% gap. The multithread test gives 24346 versus 18057, a 34.8% margin. Random string sorting also lands at 34.8% ahead, 32037 versus 23769.

The only Passmark test where the Ryzen 9 6900HX does not dominate is single-thread performance. It scores 3409 versus 3240, a modest 5.2% lead. This is the smallest margin in the entire comparison, indicating that the two processors are nearly equivalent in lightly threaded integer workloads, despite the Ryzen 5 PRO's higher single-core R23 result.

Where Each One Wins

The Ryzen 9 6900HX is the clear winner in heavily parallel workloads. Its 8 cores and 16 threads give it a structural advantage over the Ryzen 5 PRO's 6 cores and 12 threads. The Passmark multithread score of 24346 versus 18057 confirms this, and the 77.9% physics lead reinforces the pattern. For tasks like data compression, encryption, extended instruction sets, floating point math, and integer math, the Ryzen 9 6900HX delivers margins between 28.6% and 34.8%. These are exactly the kinds of workloads that scale with core count and thread count, and the Ryzen 9 6900HX's additional two cores and four threads translate directly into higher throughput.

The Ryzen 5 PRO 5655GE wins in Cinebench R23, both multicore and single-core. The multicore result is surprising given the core deficit, but the 12.9% lead suggests that the Zen 3 architecture in the Ryzen 5 PRO extracts more performance per core in this specific rendering workload. The single-core R23 result is even more striking: 2188 versus 1558, a 28.8% advantage. This indicates that for lightly threaded rendering tasks, the Ryzen 5 PRO 5655GE is the better choice, despite the Ryzen 9 6900HX having a higher boost clock. The Ryzen 5 PRO also has a higher base clock of 3.40 GHz versus 3.30 GHz, which may contribute to its single-core efficiency.

For general desktop use, the Passmark single-thread scores are nearly identical, with the Ryzen 9 6900HX ahead by only 5.2%. This means everyday applications that rely on a single core will feel similar on both processors. The Ryzen 5 PRO 5655GE's R23 single-core dominance, however, suggests it may be better suited for specific single-threaded rendering or simulation tasks.

The Ryzen 9 6900HX is the better fit for multi-threaded productivity, content creation, and compute-heavy workloads. The Ryzen 5 PRO 5655GE is the better fit for single-threaded performance in rendering benchmarks and for users who prioritize the Zen 3 architecture's efficiency in those specific tests.

Architecture Differences

The two processors come from different generations and architectures. The AMD Ryzen 9 6900HX is part of the 6000 series, built on Zen 3+ architecture with the codename Rembrandt. It uses a 6 nm process node from TSMC and has a die size of 208 mm². The AMD Ryzen 5 PRO 5655GE is part of the 5000 series, built on Zen 3 architecture with the codename Cezanne. It uses a 7 nm process node, also from TSMC, and has a die size of 180 mm². The Ryzen 5 PRO packs 10,700 million transistors, while the Ryzen 9 6900HX does not have a recorded transistor count in the database.

Core and thread counts differ significantly. The Ryzen 9 6900HX has 8 cores and 16 threads, while the Ryzen 5 PRO 5655GE has 6 cores and 12 threads. Both use 64 KB of L1 cache per core and 512 KB of L2 cache per core. The L3 cache is 16 MB shared on the Ryzen 9 6900HX, and 16 MB on the Ryzen 5 PRO, so cache capacity is effectively the same.

Memory support is a major differentiator. The Ryzen 9 6900HX supports DDR5 memory with a dual-channel bus and a memory bandwidth of 76.8 GB/s. The Ryzen 5 PRO 5655GE supports DDR4 memory with a dual-channel bus and a memory bandwidth of 51.2 GB/s. The Ryzen 9 6900HX offers 50% more memory bandwidth, which can benefit memory-sensitive workloads. The Ryzen 5 PRO supports ECC memory, while the Ryzen 9 6900HX does not.

PCIe support also differs. The Ryzen 9 6900HX provides Gen 4 with 20 lanes (CPU only), while the Ryzen 5 PRO 5655GE provides Gen 3 with 16 lanes (CPU only). The newer and wider PCIe interface on the Ryzen 9 6900HX allows for faster connectivity to GPUs and storage devices.

The integrated graphics differ as well. The Ryzen 9 6900HX features Radeon 680M graphics, while the Ryzen 5 PRO 5655GE features Radeon Vega 7. The Ryzen 9 6900HX is a mobile processor using AMD Socket FP7, while the Ryzen 5 PRO 5655GE is a desktop processor using AMD Socket AM4. The Ryzen 9 6900HX has an unlocked multiplier, while the Ryzen 5 PRO 5655GE does not.

The TDP values are notable. The Ryzen 9 6900HX has a 45 W TDP, while the Ryzen 5 PRO 5655GE has a 65 W TDP. This is counterintuitive given the Ryzen 9 6900HX's higher core count, but it reflects the different market segments: mobile versus desktop.

FAQ

Q: Which processor has more cores?

A: The AMD Ryzen 9 6900HX has 8 cores and 16 threads, while the AMD Ryzen 5 PRO 5655GE has 6 cores and 12 threads.

Q: Which processor has the higher boost clock?

A: The AMD Ryzen 9 6900HX has a boost clock of 4.90 GHz, while the AMD Ryzen 5 PRO 5655GE has a boost clock of 4.40 GHz.

Q: How do the two compare in Cinebench R23 multicore?

A: The AMD Ryzen 5 PRO 5655GE wins, scoring 15504 versus 13497 for the AMD Ryzen 9 6900HX, a 12.9% advantage.

Q: Which processor has higher memory bandwidth?

A: The AMD Ryzen 9 6900HX has a memory bandwidth of 76.8 GB/s with DDR5 support, while the AMD Ryzen 5 PRO 5655GE has 51.2 GB/s with DDR4 support.

Q: Does either processor support ECC memory?

A: The AMD Ryzen 5 PRO 5655GE supports ECC memory, while the AMD Ryzen 9 6900HX does not.

Q: Which processor has a higher Passmark multithread score?

A: The AMD Ryzen 9 6900HX scores 24346, while the AMD Ryzen 5 PRO 5655GE scores 18057, a 34.8% difference.

Specification Differences

| Specification | AMD Ryzen 9 6900HX | AMD Ryzen 5 PRO 5655GE |

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

| Cores | 8 | 6 |

| Threads | 16 | 12 |

| Base Clock | 3.30 GHz | 3.40 GHz |

| Boost Clock | 4.90 GHz | 4.40 GHz |

| TDP | 45 W | 65 W |

| Socket | AMD Socket FP7 | AMD Socket AM4 |

| Architecture | Zen 3+ | Zen 3 |

| Codename | Rembrandt | Cezanne |

| Process Node | 6 nm | 7 nm |

| Die Size | 208 mm² | 180 mm² |

| Transistors | Not recorded | 10,700 million |

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

| Memory Support | DDR5 | DDR4 |

| Memory Bandwidth | 76.8 GB/s | 51.2 GB/s |

| ECC Memory | No | Yes |

| PCIe | Gen 4, 20 Lanes (CPU only) | Gen 3, 16 Lanes (CPU only) |

| Integrated Graphics | Radeon 680M | Radeon Vega 7 |

| Market Segment | Mobile | Desktop |

| Multiplier Unlocked | Yes | No |

| Release Date | Not recorded | 2024-05-06 |

| Part Number | 100-000000544100-000000560 | 100-000001514 |