AMD Ryzen 5 PRO 5655G vs AMD Ryzen 7 6800U Comparison

The AMD Ryzen 5 PRO 5655G and AMD Ryzen 7 6800U are two very different processors with a nearly identical average benchmark score. The data shows the Ryzen 5 PRO 5655G is a desktop part built for sustained multi-threaded workloads, while the Ryzen 7 6800U is a mobile chip designed for efficiency. The head-to-head results are split, with the Ryzen 5 PRO 5655G winning 7 of the 15 benchmarks and the Ryzen 7 6800U taking 8, but the margin of victory tells the real story.

Head-to-Head Benchmarks

The most significant divergence appears in the Cinebench tests. In the Cinebench R23 multicore test, the AMD Ryzen 5 PRO 5655G scores 17,249 points against the Ryzen 7 6800U’s 10,546, a massive 63.6% advantage. This is the single largest gap in the entire comparison and highlights the desktop chip’s ability to sustain high clocks across all cores. The single-core Cinebench R23 result follows the same pattern, with the Ryzen 5 PRO 5655G scoring 2,435 versus 1,506 for the Ryzen 7 6800U, a 61.7% lead. This suggests the Ryzen 5 PRO 5655G offers a significantly stronger per-core performance in this specific rendering workload.

However, the older Cinebench R15 multicore test tells a different story. Here, the Ryzen 7 6800U edges out a win with a score of 1,776 against 1,738 for the Ryzen 5 PRO 5655G, a 2.1% difference. This is a curious reversal, indicating that the Ryzen 7 6800U’s eight cores can outperform the Ryzen 5 PRO 5655G’s six cores in this particular test version. The Ryzen 5 PRO 5655G does manage a narrow win in the Cinebench R15 single-core test, scoring 245 versus 242, a 1.2% advantage.

Moving to PassMark tests, the results are more varied. The Ryzen 5 PRO 5655G wins in data compression with a score of 255,608, a 4.7% lead over the 244,082 from the Ryzen 7 6800U. It also takes the extended instructions test with 17,944 points versus 15,935, a 12.6% advantage. In the single-thread PassMark test, the Ryzen 5 PRO 5655G scores 3,241, which is 2.4% higher than the 3,166 from the Ryzen 7 6800U. The Ryzen 7 6800U, however, dominates in several other PassMark categories. It wins integer math with a score of 77,731 against 67,561, a 13.1% lead, and floating-point math with 42,246 versus 38,649, an 8.5% advantage. The Ryzen 7 6800U also shows a strong win in the physics test, scoring 984 versus 686, a substantial 30.3% lead. The mobile chip also takes prime numbers, scoring 57 versus 49, a 14% advantage, and multithread with 20,350 versus 19,129, a 6% lead. The remaining tests, data encryption and random string sorting, are close, with the Ryzen 7 6800U winning both by 2.2% and 2.7% respectively.

Where Each One Wins

The AMD Ryzen 5 PRO 5655G is the clear winner in rendering and heavy computational tasks that rely on high clock speeds and a robust single-core architecture. Its massive wins in Cinebench R23 (both single and multi-core) and a 12.6% lead in extended instructions make it the better choice for applications like video encoding, 3D rendering, and scientific computing. The data also shows it is superior in data compression, making it a solid pick for file archiving and database work. Its single-thread PassMark score of 3,241 confirms its strength in lightly threaded applications like older games or general desktop responsiveness.

The AMD Ryzen 7 6800U, despite having a lower base clock of 2.70 GHz, uses its eight cores to win in more diverse workloads. Its 30.3% lead in the PassMark physics test is a strong indicator for gaming performance in physics-heavy titles. The 13.1% lead in integer math and 8.5% lead in floating-point math suggest it handles general-purpose calculations and scientific simulations more effectively. The mobile chip also wins the multithread test by 6%, indicating better overall throughput in mixed parallel workloads. It also scores higher in data encryption and random string sorting, though by smaller margins.

Architecture Differences

The two processors are built on different architectures and process nodes. The AMD Ryzen 5 PRO 5655G is a desktop chip based on the Zen 3 architecture with the codename Cezanne, manufactured on a 7nm process at TSMC. The AMD Ryzen 7 6800U is a mobile processor using the Zen 3+ architecture with the codename Rembrandt, built on a more advanced 6nm process, also at TSMC. The die size differs, with the Ryzen 5 PRO 5655G measuring 180 mm² and the Ryzen 7 6800U coming in larger at 208 mm². The transistor count is listed for the Ryzen 5 PRO 5655G at 10,700 million, but is not specified for the Ryzen 7 6800U.

Both processors feature 64 KB of L1 cache per core and 512 KB of L2 cache per core. The L3 cache is 16 MB in both cases, though it is described as a single block for the Ryzen 5 PRO 5655G and as "shared" for the Ryzen 7 6800U. A key difference is memory support: the Ryzen 5 PRO 5655G uses DDR4 memory, while the Ryzen 7 6800U supports the newer DDR5 standard. This directly impacts memory bandwidth, with the Ryzen 5 PRO 5655G rated at 51.2 GB/s and the Ryzen 7 6800U at 76.8 GB/s, a significant advantage for the mobile chip. The Ryzen 5 PRO 5655G also supports ECC memory, while the Ryzen 7 6800U does not. PCIe support differs as well, with the Ryzen 5 PRO 5655G offering Gen 3 with 16 lanes and the Ryzen 7 6800U offering faster Gen 4 with 20 lanes. The integrated graphics are also different, with the Ryzen 5 PRO 5655G featuring a Radeon Vega 7 and the Ryzen 7 6800U featuring a Radeon 680M.

Specification Differences

The table below highlights the key specifications where the two processors differ.

| Specification | AMD Ryzen 5 PRO 5655G | AMD Ryzen 7 6800U |

| :--- | :--- | :--- |

| Series | 5000 series | 6000 series |

| Cores | 6 | 8 |

| Threads | 12 | 16 |

| Base Clock | 3.90 GHz | 2.70 GHz |

| Boost Clock | 4.40 GHz | 4.70 GHz |

| TDP | 65 W | 15 W |

| Socket | AMD Socket AM4 | AMD Socket FP7 |

| Architecture | Zen 3 | Zen 3+ |

| Codename | Cezanne | Rembrandt |

| Process Node | 7 nm | 6 nm |

| Die Size | 180 mm² | 208 mm² |

| Memory Support | DDR4 | DDR5 |

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

| ECC Memory | Yes | No |

| PCIe | Gen 3, 16 Lanes | Gen 4, 20 Lanes |

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

| Market Segment | Desktop | Mobile |

FAQ

Q: Which processor is faster in single-core performance?

A: The AMD Ryzen 5 PRO 5655G wins all single-core benchmarks. It scores 245 in Cinebench R15 single-core, 2,435 in Cinebench R23 single-core, and 3,241 in PassMark single-thread, compared to 242, 1,506, and 3,166 for the Ryzen 7 6800U respectively.

Q: Does the Ryzen 7 6800U have more cores?

A: Yes, the Ryzen 7 6800U has 8 cores and 16 threads, while the Ryzen 5 PRO 5655G has 6 cores and 12 threads.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen 7 6800U has a higher boost clock of 4.70 GHz, while the Ryzen 5 PRO 5655U has a boost clock of 4.40 GHz.

Q: What is the difference in memory bandwidth?

A: The Ryzen 7 6800U supports DDR5 memory and has a memory bandwidth of 76.8 GB/s, which is significantly higher than the 51.2 GB/s of the Ryzen 5 PRO 5655G, which uses DDR4 memory.

Q: Which processor is more power-efficient?

A: The Ryzen 7 6800U has a TDP of 15 W, which is much lower than the 65 W TDP of the Ryzen 5 PRO 5655G, indicating it is designed for power efficiency in mobile devices.

Q: Does the Ryzen 5 PRO 5655G support ECC memory?

A: Yes, the Ryzen 5 PRO 5655G supports ECC memory, while the Ryzen 7 6800U does not.

The Verdict

The data presents a clear split based on use case. The AMD Ryzen 5 PRO 5655G is the better choice for users who prioritize raw multi-threaded rendering performance and single-core speed. Its 63.6% lead in Cinebench R23 multicore and 61.7% lead in Cinebench R23 single-core make it the superior option for workstation tasks like 3D rendering, video editing, and software compilation. The desktop chip also benefits from ECC memory support, making it suitable for data integrity-sensitive environments. Its higher TDP of 65 W suggests it is intended for systems with adequate cooling where sustained performance is expected.

The AMD Ryzen 7 6800U is the better choice for mobile users and those who need a balance of performance and efficiency. Its 15 W TDP makes it ideal for laptops where battery life and thermal management are critical. Despite having a lower base clock, its eight cores allow it to win in the PassMark physics test by 30.3% and in integer math by 13.1%, indicating strong performance in gaming and general computing. The support for DDR5 memory and Gen 4 PCIe also gives it a more modern platform foundation. The data suggests that while the Ryzen 5 PRO 5655G is a powerhouse for desktop productivity, the Ryzen 7 6800U offers a more versatile and efficient package for portable systems. The average benchmark scores are nearly identical, with the Ryzen 5 PRO 5655G at 28,032 and the Ryzen 7 6800U at 27,887, so the choice ultimately comes down to the specific workload and platform requirements.