AMD Radeon Pro Vega 20 vs AMD Radeon Pro W5500X Comparison

The AMD Radeon Pro W5500X and AMD Radeon Pro Vega 20 are both end-of-life workstation graphics solutions from AMD, but they represent distinct generations and design philosophies. The benchmark data shows the two cards are remarkably close in overall performance, with the Vega 20 holding a slight edge in the single available head-to-head test, while the W5500X counters with a more modern feature set and a different memory configuration. The key takeaway for a builder is that this is not a clear-cut generational leap, but rather a nuanced trade-off between raw compute efficiency, memory bandwidth, and API support.

Head-to-Head Benchmarks

The only direct benchmark comparison available is the Geekbench Metal test, and the results are surprisingly tight given the architectural differences. The AMD Radeon Pro Vega 20 scores 30,427 points, while the AMD Radeon Pro W5500X scores 27,973 points. This gives the Vega 20 a decisive win in this specific test, with a delta of -8.1% from the perspective of the W5500X. In practical terms, this means the Vega 20 is approximately 8.8% faster than the W5500X in this Metal workload, a significant margin for any professional application that relies heavily on Apple’s Metal API.

However, the W5500X is not without its own competitive standing. Its average benchmark score across all tests is 27,973, placing it in the 73rd percentile of all GPUs. Its nearest rivals include the NVIDIA GeForce GTX 980 Ti, which scores 28,020 (a delta of -0.2%), and the AMD Radeon RX 7800M, which scores 27,883 (a delta of +0.3%). This places the W5500X in a tight cluster where a 0.5% difference separates it from the Vega 20, showing that while the Vega 20 wins the head-to-head, the overall performance envelope is nearly identical. The data suggests that in broader workloads beyond the single Metal test, the W5500X is essentially a peer of the Vega 20, not a distant second.

The Vega 20’s benchmark profile is more complex, with three distinct scores: 30,427 in Geekbench Metal, 26,679 in Geekbench OpenCL, and 26,410 in Geekbench Vulkan. Its average score across these tests is 27,839, which is the exact figure used for its comparison against the W5500X. The spread between its best and worst scores is notable, indicating that its performance is highly dependent on the API. Meanwhile, the W5500X has only a single benchmark score listed, which makes direct cross-API comparisons impossible. The data clearly shows the Vega 20 has a higher peak performance, but the W5500X’s consistency across different test types remains unverified.

Architecture Differences

The two cards are built on fundamentally different foundations. The W5500X utilizes the Navi 14 chip, based on the RDNA 1.0 architecture, manufactured on a 7 nm process at TSMC. This is a significant leap in fabrication efficiency, allowing for a transistor count of 6,400 million on a die size of just 158 mm². This results in a transistor density of 40.5 million per square millimeter. In contrast, the Vega 20 uses the Vega 12 chip, based on the older GCN 5.0 architecture, built on a 14 nm process at GlobalFoundries. While its transistor count and die size are not listed in the data, the larger process node implies a less dense design, which typically translates to higher power draw for equivalent performance.

The compute configurations differ in both scale and speed. The W5500X features 1,536 shading units, 96 texture mapping units (TMUs), and 32 render output units (ROPs). Its base clock is 1,187 MHz, boosting to 1,757 MHz. The Vega 20, by contrast, has fewer resources: 1,280 shading units, 80 TMUs, and 32 ROPs, with a much lower base clock of 815 MHz and a boost clock of 1,283 MHz. Despite the lower clock speeds, the Vega 20’s fill rates are respectable, but the W5500X’s higher clocks and additional TMUs give it a clear advantage in pixel and texture throughput. Specifically, the W5500X achieves a pixel rate of 56.22 GPixel/s and a texture rate of 168.7 GTexel/s, versus the Vega 20’s 41.06 GPixel/s and 102.6 GTexel/s.

Memory is where the two diverge most dramatically. The W5500X is equipped with 8 GB of GDDR6 memory on a 128-bit bus, delivering a bandwidth of 224.0 GB/s. The Vega 20 uses 4 GB of HBM2 memory on a massive 1024-bit bus, but its effective speed is lower, yielding a bandwidth of 189.4 GB/s. This means the W5500X has both more capacity and higher bandwidth, a significant advantage for large datasets and high-resolution textures. Furthermore, the W5500X supports Vulkan 1.4, while the Vega 20 is limited to Vulkan 1.3, indicating a more modern driver and API support stack.

The Verdict

From the data, the choice between these two cards depends entirely on the workload priority. The AMD Radeon Pro Vega 20 is the winner in the only direct benchmark available, the Geekbench Metal test, scoring 30,427 versus the W5500X’s 27,973. If a user’s primary applications are heavily optimized for Metal on macOS, the Vega 20’s performance advantage is clear and measurable. Its lower TDP of 100 W versus the W5500X’s 125 W also makes it a more power-efficient option in that specific scenario.

However, the W5500X is the more future-proof and versatile choice based on the broader specification sheet. It offers double the memory capacity (8 GB vs 4 GB), significantly higher memory bandwidth (224.0 GB/s vs 189.4 GB/s), and a much faster compute core in terms of raw clock speed and TMU count. Its 7 nm process and RDNA architecture suggest better efficiency per watt in many workloads, despite the higher TDP. For tasks that are not Metal-centric, such as those relying on OpenCL or Vulkan, the W5500X’s superior texture rate and memory subsystem could easily close the gap seen in the Metal test. The W5500X also has a listed launch MSRP of 599 USD, which can be stated as a reference point. The Vega 20 has no such listed price.

Specification Differences

The following table highlights the key specification differences between the two cards, based solely on the data provided.

| Specification | AMD Radeon Pro W5500X | AMD Radeon Pro Vega 20 |

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

| Chip | Navi 14 | Vega 12 |

| Architecture | RDNA 1.0 | GCN 5.0 |

| Process Node | 7 nm | 14 nm |

| Foundry | TSMC | GlobalFoundries |

| Transistors | 6,400 million | Not listed |

| Die Size | 158 mm² | Not listed |

| Base Clock | 1,187 MHz | 815 MHz |

| Boost Clock | 1,757 MHz | 1,283 MHz |

| Memory Size | 8 GB | 4 GB |

| Memory Type | GDDR6 | HBM2 |

| Memory Bus | 128 bit | 1024 bit |

| Memory Bandwidth | 224.0 GB/s | 189.4 GB/s |

| Memory Clock | 14 Gbps effective | 1480 Mbps effective |

| Shading Units | 1,536 | 1,280 |

| TMUs | 96 | 80 |

| Pixel Rate | 56.22 GPixel/s | 41.06 GPixel/s |

| Texture Rate | 168.7 GTexel/s | 102.6 GTexel/s |

| FP32 Performance | 5.398 TFLOPS | 3.284 TFLOPS |

| FP16 Performance | 10.80 TFLOPS (2:1) | 6.569 TFLOPS (2:1) |

| TDP | 125 W | 100 W |

| Slot Width | Dual-slot | IGP |

| Bus Interface | Apple MPX | PCIe 3.0 x16 |

| Display Outputs | 2x HDMI 2.0b | Portable Device Dependent |

| Vulkan Version | 1.4 | 1.3 |

| Release Date | 2019-12-10 | 2018-11-13 |

| Suggested PSU | 300 W | Not listed |

FAQ

Q: Which card is faster in the Geekbench Metal benchmark?

A: The AMD Radeon Pro Vega 20 is faster, scoring 30,427 points compared to the AMD Radeon Pro W5500X’s 27,973 points, a difference of 8.1% in favor of the Vega 20.

Q: How does the memory configuration differ between the two cards?

A: The W5500X has 8 GB of GDDR6 memory on a 128-bit bus, delivering 224.0 GB/s of bandwidth. The Vega 20 has 4 GB of HBM2 memory on a 1024-bit bus, but delivers less bandwidth at 189.4 GB/s.

Q: Which card offers higher theoretical compute performance?

A: The W5500X has a higher FP32 performance of 5.398 TFLOPS and FP16 performance of 10.80 TFLOPS, while the Vega 20 achieves 3.284 TFLOPS FP32 and 6.569 TFLOPS FP16.

Q: What are the process node differences?

A: The W5500X is built on a 7 nm process at TSMC, while the Vega 20 uses a 14 nm process at GlobalFoundries. The W5500X’s die size is 158 mm² with 6,400 million transistors.

Q: Which card has a higher power draw?

A: The W5500X has a TDP of 125 W, whereas the Vega 20 has a lower TDP of 100 W. The W5500X also suggests a 300 W power supply, while the Vega 20 has no such recommendation.

Q: Do they support different versions of Vulkan?

A: Yes. The W5500X supports Vulkan 1.4, while the Vega 20 is limited to Vulkan 1.3.

Where Each One Wins

AMD Radeon Pro Vega 20 is the clear winner in the Geekbench Metal benchmark, which is a critical metric for macOS users running Metal-accelerated applications. Its score of 30,427 outpaces the W5500X’s 27,973 by a solid margin. It also has a lower TDP of 100 W, making it a more power-efficient option for portable devices, as indicated by its "IGP" slot width and "Portable Device Dependent" display outputs. For users with a primary focus on Metal-based rendering or compute tasks in a mobile or low-power chassis, the Vega 20 is the superior choice based on the data.

AMD Radeon Pro W5500X wins on nearly every other measurable specification. Its 8 GB of memory is double the Vega 20’s 4 GB, and its 224.0 GB/s of bandwidth is higher, which is critical for large textures and compute datasets. Its FP32 throughput of 5.398 TFLOPS is over 60% higher than the Vega 20’s 3.284 TFLOPS, indicating a major advantage in general compute tasks. The W5500X also has a much higher texture rate (168.7 GTexel/s vs 102.6 GTexel/s) and pixel rate (56.22 GPixel/s vs 41.06 GPixel/s), making it better suited for rasterization-heavy workloads. The newer Vulkan 1.4 support and dual-slot, desktop-oriented design with 2x HDMI 2.0b outputs also point to a more capable workstation desktop card. For any workload that is not strictly Metal-bound, the W5500X’s superior compute, memory, and modern architecture make it the more capable card.