AMD Radeon Pro Vega 20 vs AMD Radeon RX 6800M Comparison

The AMD Radeon RX 6800M and the AMD Radeon Pro Vega 20 represent two distinct eras of mobile graphics, separated by a generational leap in architecture and process technology. The data shows a decisive performance gap, with the RX 6800M winning all shared benchmarks by significant margins, yet the Pro Vega 20 holds its own in the average benchmark score percentile, suggesting a different performance profile across a wider range of tests. This analysis explores where each GPU excels, the architectural reasons behind their differences, and what the benchmark results mean for potential use cases.

Where Each One Wins

The benchmark data from the FACT PACK reveals a clear split in performance characteristics. The AMD Radeon RX 6800M is the outright winner in every single head-to-head comparison, showcasing its dominance in modern, compute-heavy workloads. Its victories in Geekbench Metal, OpenCL, and Vulkan tests are not marginal; they are substantial, with deltas ranging from 228.4% to 273.8% over the Pro Vega 20. This indicates the RX 6800M is designed for raw, uncompromising performance in the latest APIs and compute tasks, making it the clear choice for demanding gaming and creative applications that leverage these interfaces.

Conversely, the AMD Radeon Pro Vega 20 does not win any of the head-to-head benchmarks, but its overall standing in the database is surprisingly competitive. With a percentile ranking of 73 versus the RX 6800M's 74, and a very close average benchmark score of 27839 versus 28874, the Pro Vega 20 appears to perform relatively better in a broader set of legacy or different workload tests not covered in the direct comparison. This suggests that while the RX 6800M is a specialist in raw speed, the Pro Vega 20 might be a more balanced general-purpose performer within its own ecosystem, particularly for applications that are not heavily reliant on the latest graphics APIs.

The RX 6800M's wins are in the modern compute landscape, while the Pro Vega 20's strength, inferred from its comparable average score, lies in a wider, less API-specific range of tasks. For a user prioritizing peak performance in DirectX 12, Vulkan, or Metal, the RX 6800M is the definitive winner. For those whose workloads involve a mix of older and newer applications, the Pro Vega 20's more balanced profile might be less of a liability, though it still trails in raw power.

Architecture Differences

The two GPUs are built on fundamentally different architectures and process nodes, explaining their performance disparity. The AMD Radeon RX 6800M is based on the RDNA 2.0 architecture and is manufactured on a 7 nm process at TSMC. It features a Navi 22 chip with 17,200 million transistors on a 335 mm² die, resulting in a transistor density of 51.3M / mm². This modern design includes 2560 shading units, 160 TMUs, 64 ROPs, and 40 dedicated ray tracing cores, supporting DirectX 12 Ultimate (12_2) and Vulkan 1.4.

In contrast, the AMD Radeon Pro Vega 20 is based on the older GCN 5.0 architecture and uses a 14 nm process at GlobalFoundries. Its Vega 12 chip has fewer resources, with 1280 shading units, 80 TMUs, and 32 ROPs, and it lacks dedicated ray tracing cores. It supports DirectX 12 (12_1) and Vulkan 1.3, a generation behind the RX 6800M's feature set. The process node difference alone (7 nm vs 14 nm) provides the RX 6800M with a significant efficiency and density advantage, allowing for more compute units in a similar power envelope.

Memory architecture also differs drastically. The RX 6800M uses 12 GB of GDDR6 memory on a 192-bit bus, delivering 384.0 GB/s of bandwidth. The Pro Vega 20 uses 4 GB of HBM2 memory on a much wider 1024-bit bus, but with a lower 740 MHz clock, it achieves only 189.4 GB/s of bandwidth. While HBM2 offers a wider interface, the RX 6800M's higher-clocked GDDR6 provides more than double the effective bandwidth, a critical factor for high-resolution textures and compute workloads. The RX 6800M also has a much higher boost clock (2390 MHz vs 1283 MHz), further widening the performance gap in clock-for-clock operations.

Head-to-Head Benchmarks

The direct comparison in the FACT PACK includes three Geekbench tests, and the RX 6800M wins all of them by a wide margin. The most significant victory is in the Geekbench Metal test, where the RX 6800M scores 113,721 against the Pro Vega 20's 30,427. This is a delta of 273.8%, meaning the RX 6800M is nearly four times faster in this Apple-developed API, which is critical for macOS applications and creative software.

In the Geekbench OpenCL test, which is a cross-platform compute benchmark, the RX 6800M scores 87,621 while the Pro Vega 20 scores 26,679. The delta here is 228.4%, indicating a massive advantage in general-purpose GPU compute tasks. This is a clear signal that the RX 6800M's newer architecture and higher bandwidth translate directly into superior raw compute throughput.

The Geekbench Vulkan test shows a similar story, with the RX 6800M scoring 94,766 versus the Pro Vega 20's 26,410, a delta of 258.8%. Vulkan is a low-overhead, cross-platform API used in modern games and professional applications. The RX 6800M's support for Vulkan 1.4 (versus 1.3) and its superior hardware resources make it the clear leader here. These three results collectively show a consistent, overwhelming performance advantage for the RX 6800M across all modern compute and graphics APIs.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The AMD Radeon RX 6800M has a higher average benchmark score of 28,874, while the AMD Radeon Pro Vega 20 scores 27,839. This is a difference of just 3.7% in the RX 6800M's favor.

Q: Is the RX 6800M always faster than the Pro Vega 20?

A: In the three head-to-head Geekbench tests, the RX 6800M wins all of them by a large margin, with deltas of 273.8% in Metal, 228.4% in OpenCL, and 258.8% in Vulkan. However, the Pro Vega 20's comparable average score suggests it may be more competitive in other, non-listed benchmark scenarios.

Q: What are the key differences in memory configuration?

A: The RX 6800M has 12 GB of GDDR6 memory on a 192-bit bus with 384.0 GB/s bandwidth. The Pro Vega 20 has 4 GB of HBM2 memory on a 1024-bit bus, but its bandwidth is only 189.4 GB/s due to a lower memory clock.

Q: Do both GPUs support ray tracing?

A: No. The AMD Radeon RX 6800M has 40 dedicated ray tracing cores, while the AMD Radeon Pro Vega 20 has no ray tracing cores listed in its specifications.

Q: Which GPU has a higher transistor density?

A: The RX 6800M has a transistor density of 51.3M / mm², while the Pro Vega 20's transistor count and die size are not listed in the data, so its density cannot be calculated.

Q: What is the power consumption difference?

A: The RX 6800M has a TDP of 145 W, while the Pro Vega 20 has a TDP of 100 W. The RX 6800M consumes more power but delivers significantly higher performance.

The Verdict

Based strictly on the benchmark data, the AMD Radeon RX 6800M is the superior GPU for any task that leverages modern graphics APIs and compute workloads. Its wins in Metal, OpenCL, and Vulkan are so substantial that it is the clear choice for gamers and professionals using demanding applications. The data shows it is not just faster; it is in a different performance class, offering 228% to 274% more performance in the tested scenarios. For users who need maximum frame rates or fastest render times in modern software, the RX 6800M is the only logical pick.

The AMD Radeon Pro Vega 20 is a harder sell based on the head-to-head data. While its average benchmark score is close to the RX 6800M, it loses every direct comparison. Its strengths appear to lie in a broader set of legacy or non-API-specific workloads, where its 73rd percentile ranking and 27,839 average score suggest it remains a capable, balanced mobile GPU. However, for the specific tests where they are directly compared, the Pro Vega 20 is consistently and overwhelmingly beaten. A user choosing the Pro Vega 20 would be doing so despite the performance data, likely due to platform compatibility or specific software requirements outside the tested benchmarks.

The verdict is clear: the RX 6800M is the performance king, while the Pro Vega 20 offers a more modest, but still credible, level of performance for a different set of tasks. The data in the FACT PACK does not support choosing the Pro Vega 20 for any of the tested workloads.

Specification Differences

The following table outlines the key specification differences between the two GPUs, based only on the provided data.

| Specification | AMD Radeon RX 6800M | AMD Radeon Pro Vega 20 |

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

| Architecture | RDNA 2.0 | GCN 5.0 |

| Process Node | 7 nm | 14 nm |

| Transistors | 17,200 million | Not specified |

| Die Size | 335 mm² | Not specified |

| Base Clock | 2116 MHz | 815 MHz |

| Boost Clock | 2390 MHz | 1283 MHz |

| Memory Size | 12 GB | 4 GB |

| Memory Type | GDDR6 | HBM2 |

| Memory Bus Width | 192 bit | 1024 bit |

| Memory Bandwidth | 384.0 GB/s | 189.4 GB/s |

| Shading Units | 2560 | 1280 |

| TMUs | 160 | 80 |

| ROPs | 64 | 32 |

| Ray Tracing Cores | 40 | Not specified |

| Pixel Rate | 153.0 GPixel/s | 41.06 GPixel/s |

| Texture Rate | 382.4 GTexel/s | 102.6 GTexel/s |

| FP32 Performance | 12.24 TFLOPS | 3.284 TFLOPS |

| TDP | 145 W | 100 W |

| Bus Interface | PCIe 4.0 x16 | PCIe 3.0 x16 |

| DirectX Support | 12 Ultimate (12_2) | 12 (12_1) |

| Vulkan Support | 1.4 | 1.3 |