AMD Radeon RX Vega 56 vs NVIDIA RTX A6000 Comparison

The Verdict

The database shows two very different workstation-class GPUs separated by roughly three years of architecture evolution. The NVIDIA RTX A6000 is the clear performance leader, sitting at the 84th percentile among all GPUs with an average benchmark score of 44,075, while the AMD Radeon RX Vega 56 lands at the 81st percentile with an average score of 37,507. That is a 17.5% gap in average benchmark scores, a substantial margin that reflects the generational leap between the two designs.

For professionals needing maximum compute throughput, large memory capacity, and modern feature support, the RTX A6000 is the only defensible choice. Its 48 GB of GDDR6 memory, 38.71 TFLOPS FP32 throughput, and ray tracing and tensor cores place it in an entirely different performance class. The RX Vega 56, with 8 GB of HBM2 and 10.54 TFLOPS FP32, is a capable card for its era but cannot match the A6000's raw workload capacity.

However, the RX Vega 56 remains relevant for specific use cases. Its FP16 performance of 21.09 TFLOPS (2:1 ratio) is actually higher than its FP32 output, making it potentially interesting for workloads that leverage half-precision arithmetic. The card is also significantly lighter on power draw at 210 W versus 300 W, and it supports a wider range of display outputs including HDMI 2.0b alongside DisplayPort 1.4a. For legacy applications that predate the A6000's architecture, or for systems with more modest power delivery, the Vega 56 can still serve as a functional workstation accelerator.

The verdict is straightforward: the RTX A6000 is the superior card in nearly every measurable dimension, and the RX Vega 56 should only be considered when its lower power envelope, older API compatibility, or HDMI output are decisive factors. The data does not support any scenario where the Vega 56 outperforms the A6000 in raw compute.

Architecture Differences

The two cards represent fundamentally different hardware generations. The NVIDIA RTX A6000 uses the GA102 chip built on Ampere architecture, fabricated on Samsung's 8 nm process. The die contains 28,300 million transistors across a 628 mm² area, yielding a transistor density of 45.1 million per square millimeter. The AMD Radeon RX Vega 56 uses the Vega 10 chip based on GCN 5.0 architecture, manufactured on GlobalFoundries' 14 nm process. This die packs 12,500 million transistors into 495 mm², for a density of 25.3 million per square millimeter. The A6000 nearly doubles transistor count while using a smaller process node, which explains much of its performance advantage.

Clock behavior also diverges significantly. The A6000 runs at a 1410 MHz base clock with a 1800 MHz boost, while the Vega 56 operates at 1156 MHz base and 1471 MHz boost. The A6000's memory runs at 2000 MHz with 16 Gbps effective speed, whereas the Vega 56's HBM2 memory is clocked at 800 MHz with 1600 Mbps effective. These clock differences compound with the architectural improvements to produce large performance gaps.

The A6000 includes 84 ray tracing cores and 336 tensor cores, neither of which exist on the Vega 56. The Vega 56's GCN architecture predates dedicated ray tracing hardware and does not include tensor cores for AI acceleration. This is a fundamental architectural divergence: the A6000 is built for modern graphics features and machine learning workloads, while the Vega 56 relies on traditional shader compute.

API support also reflects the generational gap. The A6000 supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Vega 56 only reaches DirectX 12 (12_1) and Vulkan 1.3. Both cards support OpenGL 4.6. The A6000 also uses PCIe 4.0 x16, double the bandwidth of the Vega 56's PCIe 3.0 x16 interface.

FAQ

Q: How much faster is the NVIDIA RTX A6000 than the AMD Radeon RX Vega 56 in average benchmark scores?

A: The A6000 averages 44,075 across all recorded benchmarks, while the Vega 56 averages 37,507. The A6000 is 17.5% faster in this aggregate metric, placing it at the 84th percentile of all GPUs versus the Vega 56's 81st percentile.

Q: What memory configurations do these cards use?

A: The RTX A6000 has 48 GB of GDDR6 memory on a 384-bit bus with 768.0 GB/s bandwidth. The RX Vega 56 has 8 GB of HBM2 memory on a 2048-bit bus with 409.6 GB/s bandwidth. The A6000 offers six times the capacity and nearly double the bandwidth.

Q: Which card supports ray tracing?

A: Only the RTX A6000 includes dedicated ray tracing hardware, with 84 RT cores. The RX Vega 56 has no ray tracing cores, as its GCN 5.0 architecture predates this feature.

Q: What are the power requirements for each card?

A: The A6000 has a 300 W TDP with a suggested 700 W power supply and uses an 8-pin EPS connector. The Vega 56 has a 210 W TDP with a suggested 550 W power supply and uses two 8-pin connectors.

Q: When were these cards released?

A: The RTX A6000 launched on October 4, 2020, succeeding the Quadro Turing lineup and preceding Workstation Ada. The RX Vega 56 launched on August 13, 2017, succeeding Polaris and preceding Navi. Both are now end-of-life products.

Q: How do these cards compare in FP16 compute performance?

A: The A6000 delivers 38.71 TFLOPS FP16 with a 1:1 ratio to FP32. The Vega 56 delivers 21.09 TFLOPS FP16 with a 2:1 ratio, meaning its FP16 output is double its FP32 rate of 10.54 TFLOPS.

Specification Differences

| Specification | NVIDIA RTX A6000 | AMD Radeon RX Vega 56 |

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

| Chip | GA102 | Vega 10 |

| Architecture | Ampere | GCN 5.0 |

| Process Node | 8 nm (Samsung) | 14 nm (GlobalFoundries) |

| Transistors | 28,300 million | 12,500 million |

| Die Size | 628 mm² | 495 mm² |

| Transistor Density | 45.1M / mm² | 25.3M / mm² |

| Base Clock | 1410 MHz | 1156 MHz |

| Boost Clock | 1800 MHz | 1471 MHz |

| Memory Clock | 2000 MHz, 16 Gbps effective | 800 MHz, 1600 Mbps effective |

| Memory Size | 48 GB GDDR6 | 8 GB HBM2 |

| Memory Bus Width | 384 bit | 2048 bit |

| Memory Bandwidth | 768.0 GB/s | 409.6 GB/s |

| Shading Units | 10752 | 3584 |

| TMUs | 336 | 224 |

| ROPs | 112 | 64 |

| RT Cores | 84 | None |

| Tensor Cores | 336 | None |

| Pixel Rate | 201.6 GPixel/s | 94.14 GPixel/s |

| Texture Rate | 604.8 GTexel/s | 329.5 GTexel/s |

| FP32 Performance | 38.71 TFLOPS | 10.54 TFLOPS |

| FP16 Performance | 38.71 TFLOPS (1:1) | 21.09 TFLOPS (2:1) |

| TDP | 300 W | 210 W |

| Power Connectors | 8-pin EPS | 2x 8-pin |

| Suggested PSU | 700 W | 550 W |

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

| Display Outputs | 4x DisplayPort 1.4a | 1x HDMI 2.0b, 3x DisplayPort 1.4a |

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

| Vulkan Support | 1.4 | 1.3 |

| Length | 267 mm (10.5 inches) | 280 mm (11 inches) |

| Height | 112 mm (4.4 inches) | 111 mm (4.4 inches) |

| Width | Not specified | 40 mm (1.6 inches) |

| Release Date | 2020-10-04 | 2017-08-13 |

| Predecessor | Quadro Turing | Polaris |

| Successor | Workstation Ada | Navi |

| Launch MSRP | 4,649 USD | 399 USD |

Head-to-Head Benchmarks

The recorded benchmark data shows a dominant performance profile for the RTX A6000, though the available test coverage differs between the two cards. The A6000 has results across nine benchmark suites, while the Vega 56 only has two recorded tests, which limits direct comparisons to specific workloads.

The largest documented win for the A6000 comes in Geekbench OpenCL, where it scores 193,937. This is the A6000's strongest single benchmark result and reflects its massive compute advantage with 10,752 shading units versus 3,584 on the Vega 56. The OpenCL workload scales well with raw shader count and memory bandwidth, both of which heavily favor the A6000.

In Geekbench Vulkan, the A6000 scores 164,462. This result further demonstrates the architectural lead, as Vulkan compute tasks benefit from the A6000's modern Ampere design and higher clock rates. The Vega 56 has no recorded Vulkan benchmark in this database, so no direct comparison is possible.

The A6000 also posts strong results in PassMark GPU compute, scoring 14,110. This test measures general-purpose compute throughput, where the A6000's 38.71 TFLOPS FP32 performance and 336 tensor cores provide substantial acceleration. The Vega 56's 10.54 TFLOPS FP32 output is less than a third of the A6000's, and it lacks tensor cores entirely.

For DirectX workloads, the A6000 records 155 in PassMark DirectX 10, 191 in DirectX 11, 87 in DirectX 12, and 245 in DirectX 9. The DirectX 12 score is notably lower than the DirectX 11 result, which may reflect driver optimization patterns or workload characteristics rather than raw hardware capability. The Vega 56 has no recorded PassMark DirectX results in this database.

The Vega 56's only recorded benchmark scores are 1,501 in 3DMark Steel Nomad DX12 and 73,512 in Geekbench Metal. The Metal score indicates reasonable performance in Apple's graphics API, which is not a workload the A6000 is tested against here. The 3DMark result provides a modern DirectX 12 gaming-oriented measurement, but without a corresponding A6000 score, direct comparison is impossible.

Looking at the nearest rivals in the database provides context for each card's positioning. The A6000's average score of 44,075 places it 0.9% ahead of the NVIDIA GeForce RTX 4090 Mobile (43,667), 1.8% ahead of the NVIDIA Quadro M6000 (43,301), and 1.9% ahead of the NVIDIA GeForce RTX 5050 Mobile (43,268). It trails the NVIDIA GeForce RTX 4070 Ti (44,795) by 1.6%. These are all modern or recent high-end parts, showing the A6000 remains competitive with current consumer flagship hardware.

The Vega 56's average score of 37,507 puts it 0.9% ahead of the AMD Radeon PRO W6400 (37,157) and 0.3% behind the NVIDIA Tesla P4 (37,628). It trails the NVIDIA GeForce RTX 4070 (37,648) by 0.4% and the NVIDIA GeForce RTX 4080 Mobile (38,135) by 1.6%. This positioning shows the Vega 56, despite its age, still performs within a narrow band of modern mid-range cards.

The benchmark data presents a clear hierarchy: the A6000 outperforms the Vega 56 by 17.5% in average scores, and its individual results in OpenCL and Vulkan show massive advantages in compute-heavy workloads. The Vega 56's strengths are limited to its Metal performance and lower power draw, neither of which translates into a win in the recorded head-to-head metrics.