AMD Radeon Pro Vega 64X vs AMD Radeon Pro W6800X Comparison

Head-to-Head Benchmarks

The benchmark data in the database shows a decisive overall win for the AMD Radeon Pro W6800X, with two wins out of two recorded tests against the AMD Radeon Pro Vega 64X. The W6800X leads by a substantial margin in both the Metal and OpenCL API tests, which are the two primary workloads recorded for these cards.

The most significant difference appears in the Geekbench Metal test. The W6800X scores 196,844 while the Vega 64X scores 83,450. That is a delta of 135.9% in favor of the W6800X. In practical terms, the newer card more than doubles the raw Metal score of its predecessor. This is a massive generational jump, and for any application that relies heavily on Apple's Metal API, the W6800X is in a completely different performance class.

The OpenCL test shows a tighter, but still decisive, gap. The W6800X scores 124,498 while the Vega 64X scores 78,467. The delta here is 58.7% in favor of the W6800X. While not as extreme as the Metal result, this still represents a commanding lead in compute-heavy, cross-platform workloads. OpenCL performance is often a better indicator of general-purpose GPU compute, and the W6800X's 58.7% advantage suggests it handles a broader range of professional tasks with significantly more headroom.

Looking at the averages, the W6800X has an average benchmark score of 160,671 across all recorded tests. The Vega 64X has an average of 80,959. This means the W6800X sits at nearly double the average performance of the Vega 64X. The W6800X also achieves a 97th percentile ranking among all GPUs in the database, while the Vega 64X sits at the 92nd percentile. While both are high performers, the W6800X is positioned far closer to the top of the entire GPU landscape.

The nearest rivals for each card further underscore the difference in class. The W6800X's closest competitors are the NVIDIA RTX 4500 Ada Generation (average score 166,094, delta -3.3%), the NVIDIA RTX A5500 (165,217, -2.8%), the AMD Radeon PRO W7800 (164,894, -2.6%), and the NVIDIA A100 PCIe 40 GB (162,504, -1.1%). The W6800X sits right in that pack, essentially trading blows with some of the most powerful professional accelerators available.

The Vega 64X, by contrast, is surrounded by a much lower performance tier. Its closest rivals include the AMD Radeon PRO W6600 (average 81,995, delta -1.3%), the NVIDIA GeForce RTX 5090 (79,842, +1.4%), the NVIDIA Tesla P100 PCIe 16 GB (79,605, +1.7%), and the NVIDIA Tesla P100 PCIe 12 GB (79,396, +2%). The Vega 64X is slightly ahead of these cards, but it is clearly competing in the 80,000-point range, roughly half the level of the W6800X.

The Verdict

The data is unambiguous: the AMD Radeon Pro W6800X is the superior performer in every recorded benchmark. If you need maximum compute power in a Mac Pro environment, especially for Metal-accelerated tasks, the W6800X is the card to choose. Its 135.9% lead in Metal and 58.7% lead in OpenCL are not marginal gains; they represent a full generational leap in capability.

The Radeon Pro Vega 64X still holds its own in the 92nd percentile, and it sits slightly above the NVIDIA RTX 5090 in the database averages, so it is not a weak card. However, its performance class is roughly half that of the W6800X. The Vega 64X is best suited for older systems or workloads that do not require the absolute peak and cannot accommodate the newer card's requirements.

Strictly from the recorded data, the W6800X wins on every metric. The Vega 64X is a last-generation workhorse, while the W6800X is a modern high-end part. If your budget allows for the W6800X, there is no reason to pick the Vega 64X based on performance alone.

FAQ

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

A: The AMD Radeon Pro W6800X is much faster, scoring 196,844 versus 83,450 for the Radeon Pro Vega 64X, a delta of 135.9%.

Q: How do the two cards compare in the OpenCL test?

A: The W6800X leads again with a score of 124,498 compared to 78,467 for the Vega 64X, a 58.7% advantage.

Q: Which card has a higher average benchmark score overall?

A: The W6800X has an average benchmark score of 160,671, while the Vega 64X has an average of 80,959. The W6800X is roughly double the performance.

Q: What are the percentile rankings for each card?

A: The W6800X ranks in the 97th percentile of all GPUs in the database, while the Vega 64X ranks in the 92nd percentile.

Q: How does the Vega 64X compare to a modern NVIDIA GeForce RTX 5090?

A: The Vega 64X has an average score of 80,959, while the RTX 5090 has an average of 79,842. The Vega 64X is 1.4% ahead.

Q: Is the W6800X faster than the NVIDIA A100 PCIe 40 GB?

A: The W6800X has an average score of 160,671, while the A100 has an average of 162,504. The A100 is 1.1% ahead, so they are very close.

Specification Differences

The two cards differ fundamentally in their memory and bandwidth configurations. The W6800X has 32 GB of GDDR6 memory on a 256-bit bus with a bandwidth of 512.0 GB/s. The Vega 64X has 16 GB of HBM2 memory on a 2048-bit bus, but the same bandwidth of 512.0 GB/s. Both have identical memory bandwidth, but the W6800X has double the capacity.

Clock speeds also differ. The W6800X has a base clock of 1800 MHz and a boost clock of 2087 MHz. The Vega 64X has a base clock of 1250 MHz and a boost of 1468 MHz. The memory clock differs significantly as well: the W6800X runs at 2000 MHz with 16 Gbps effective speed, while the Vega 64X runs at 1000 MHz with 2 Gbps effective.

The physical specifications are also distinct. The W6800X has a power draw of 200 W, while the Vega 64X draws 250 W. The W6800X uses an Apple MPX power connector and is a quad-slot card, while the Vega 64X is an integrated GPU (IGP) with no power connectors and no suggested PSU. The W6800X uses an Apple MPX bus interface, while the Vega 64X uses PCIe 3.0 x16. The W6800X has a length of 267 mm (10.5 inches) and a height of 120 mm (4.7 inches); the Vega 64X has no recorded dimensions.

Architecture Differences

The architectural gap is the root cause of the performance difference. The W6800X is built on the RDNA 2.0 architecture using the Navi 21 chip, while the Vega 64X uses the older GCN 5.0 architecture with the Vega 10 chip. This is a generational shift in design philosophy.

The manufacturing process differs. The W6800X uses a 7 nm process from TSMC, while the Vega 64X uses a 14 nm process from GlobalFoundries. The W6800X packs 26,800 million transistors on a 520 mm² die, giving a transistor density of 51.5 million per square millimeter. The Vega 64X has 12,500 million transistors on a 495 mm² die, with a density of 25.3 million per square millimeter. The W6800X has more than double the transistor count on a similar die size.

The core configuration differs in several ways. The W6800X has 3840 shading units, 240 texture mapping units, and 96 render output units. It also has 60 ray tracing cores. The Vega 64X has 4096 shading units (more than the W6800X), but only 256 TMUs and 64 ROPs. The Vega 64X has no ray tracing cores at all. This means the W6800X has more ROPs and the critical ray tracing hardware, while the Vega 64X has a slightly higher shader count.

The API support reflects the architectural differences. The W6800X supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Vega 64X supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.3. The W6800X is a modern, feature-complete part, while the Vega is limited to older API levels.

The pixel rate and texture rate also differ significantly. The W6800X has a pixel rate of 200.4 GPixel/s and a texture rate of 500.9 GTexel/s. The Vega 64X has a pixel rate of 93.95 GPixel/s and a texture rate of 375.8 GTexel/s. The W6800X more than doubles the pixel rate and leads the texture rate by 33%.

The FP32 and FP16 performance follows the same pattern. The W6800X delivers 16.03 TFLOPS FP32 and 32.06 TFLOPS FP16 (2:1). The Vega 64X delivers 12.03 TFLOPS FP32 and 24.05 TFLOPS FP16 (2:1). The W6800X is 33% ahead in both cases.

Where Each One Wins

The AMD Radeon Pro W6800X wins in every workload recorded in the database. It scores higher in both Metal and OpenCL, and it has a higher average score overall. There is no benchmark in the data where the Vega 64X comes out ahead.

For the use case split, the W6800X is the only choice for applications that leverage Metal acceleration, given the 135.9% lead. It is also the better option for OpenCL-based compute tasks, with a 58.7% lead. If your work involves video editing, 3D rendering, or GPU-accelerated machine learning in a Mac Pro environment, the W6800X is the card that will give you the most headroom.

The Vega 64X is not without a purpose, but that purpose is narrow. It is a lower-power (250 W vs 200 W, though the W6800X is actually lower power) and physically smaller part that can fit in systems where the W6800X's quad-slot design and Apple MPX connector are not compatible. The Vega 64X is an integrated GPU solution with no external power requirements, making it easier to install in certain Mac configurations. It also supports PCIe 3.0 x16, which is more universal than the Apple MPX interface.

If you are working with a system that cannot support the W6800X's physical or power requirements, the Vega 64X is a functional alternative. But if you can accommodate the W6800X, the data shows no reason to choose the older card for performance-critical workloads. The W6800X is the clear winner in this comparison.