AMD Radeon PRO W6400 vs AMD Radeon RX Vega 64 Comparison

Head-to-Head Benchmarks

The benchmark data shows a decisive victory for the AMD Radeon RX Vega 64 across the two shared tests. In Geekbench OpenCL, the RX Vega 64 scores 62,552 against the Radeon PRO W6400's 35,027, a delta of 78.6%. That is not a marginal gap; it represents a near-doubling of raw compute throughput in this workload. The Vulkan result tells a similar story: the RX Vega 64 posts 67,032 versus 39,286 for the PRO W6400, a 70.6% advantage. Both deltas are substantial enough to classify this as a one-sided matchup in terms of raw performance.

However, the context matters. The RX Vega 64's average benchmark score across all recorded tests is 50,001, placing it in the 86th percentile of all GPUs. The PRO W6400's average sits at 37,157, which still lands in the 80th percentile. So while the older card wins outright in head-to-head comparisons, the PRO W6400 is not a weak performer in absolute terms. It trails the RX Vega 64 by roughly 34.5% in average score, but it remains competitive with a different class of hardware.

Looking at the nearest rivals for each card clarifies the positioning. The RX Vega 64's closest competitor is the NVIDIA GeForce RTX 5070 Ti, with an average score of 49,957 and a delta of just 0.1%. The Intel Arc A550M is also nearby at 49,737 (0.5% behind the Vega 64). The AMD Radeon RX 6900 XT sits 1.9% ahead, while the RX 6800 XT trails by 3.1%. These are tight margins, suggesting the Vega 64 holds its own against much newer silicon in aggregate benchmarks.

The PRO W6400's rivals paint a different picture. Its nearest neighbor is the AMD Radeon RX Vega 56 at 37,507 (0.9% ahead of the PRO W6400), followed by the NVIDIA Tesla P4 at 37,628 (1.3% ahead) and the NVIDIA GeForce RTX 4070 at 37,648 (1.3% ahead). The NVIDIA GeForce GTX TITAN X trails by 1.7%. These deltas are all under 2%, meaning the PRO W6400 sits in a tightly packed performance band. It is not a standout, but it is not an outlier either.

The data implies that the RX Vega 64, despite being older and end-of-life, delivers roughly 1.8 times the OpenCL performance of the PRO W6400. For any workload that relies on general-purpose compute, the choice is unambiguous. The Vulkan gap is slightly narrower but still overwhelming. Neither of the two shared benchmarks shows a single test where the PRO W6400 closes the gap to within striking distance.

Architecture Differences

The architectural divide between these two GPUs is stark. The RX Vega 64 uses the Vega 10 chip built on GCN 5.0 architecture, manufactured on a 14 nm process at GlobalFoundries. It packs 12,500 million transistors into a 495 mm² die, giving a transistor density of 25.3 million per square millimeter. The PRO W6400, in contrast, uses the Navi 24 chip with RDNA 2.0 architecture, fabricated by TSMC on a 6 nm process. It contains 5,400 million transistors on a 107 mm² die, achieving a density of 50.5 million per square millimeter.

The process and density differences are enormous. The PRO W6400 crams more than double the transistors per area into a die that is less than a quarter the size. This is a generational leap in manufacturing efficiency. The RX Vega 64's larger, older die draws 295 W and requires two 8-pin power connectors, while the PRO W6400 sips 50 W and needs no external power connectors at all. The suggested PSU for the Vega 64 is 600 W; the PRO W6400 recommends only 250 W.

Memory architectures diverge completely. The RX Vega 64 uses 8 GB of HBM2 across a 2048-bit bus, delivering 483.8 GB/s of bandwidth. The PRO W6400 has 4 GB of GDDR6 on a 64-bit bus, yielding 128.0 GB/s. The Vega 64's bandwidth advantage is nearly 4x, which explains its massive lead in compute-heavy tests. The PRO W6400 compensates with much higher clocks: its base is 2039 MHz and boost is 2321 MHz, versus 1247 MHz base and 1546 MHz boost for the Vega 64. But clock speed alone cannot overcome a 3.8x bandwidth deficit.

Compute resources also differ by a wide margin. The RX Vega 64 has 4096 shading units, 256 TMUs, and 64 ROPs. The PRO W6400 has 768 shading units, 48 TMUs, and 32 ROPs. The Vega 64 also has ray tracing cores absent (none listed), while the PRO W6400 includes 12 RT cores. This is a notable feature divergence: the PRO W6400 supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Vega 64 tops out at DirectX 12 (12_1) and Vulkan 1.3. The PRO W6400 is architecturally newer and supports modern rendering features, even if its raw throughput is lower.

Where Each One Wins

The RX Vega 64 wins decisively in raw compute and bandwidth-sensitive workloads. Its 483.8 GB/s memory bandwidth and 12.66 TFLOPS FP32 performance make it suited for large dataset processing, scientific simulations, and any OpenCL or Vulkan task that can saturate memory. The 78.6% OpenCL lead and 70.6% Vulkan lead confirm that. The Vega 64 also has 8 GB of VRAM versus 4 GB, which matters for holding larger textures or datasets in memory.

The PRO W6400 wins on efficiency and modern feature support. Its 50 W TDP means it can run in systems with minimal cooling and power delivery. The single-slot form factor and lack of power connectors make it easy to integrate into compact workstations. The PCIe 4.0 x4 interface, while narrow, offers double the per-lane bandwidth of the Vega 64's PCIe 3.0 x16. For workloads that are not memory-bound, the PRO W6400's higher clocks (2321 MHz boost) and RDNA 2.0 architecture could deliver competitive latency-sensitive performance.

The PRO W6400 also wins on ray tracing capability, with 12 dedicated RT cores. The Vega 64 has none. For any application that leverages DirectX 12 Ultimate features, the PRO W6400 is the only option between the two. The Vega 64's GCN architecture is older and lacks hardware ray tracing entirely. Similarly, the PRO W6400's Vulkan 1.4 support is ahead of the Vega 64's 1.3, which may matter for future-proofing in cross-platform compute.

In terms of display outputs, the Vega 64 offers more flexibility: one HDMI 2.0b and three DisplayPort 1.4a outputs, versus the PRO W6400's two DisplayPort 1.4a. Multi-monitor setups favor the Vega 64.

Specification Differences

The two cards differ on nearly every measurable specification. Process node: 14 nm versus 6 nm. Foundry: GlobalFoundries versus TSMC. Transistors: 12,500 million versus 5,400 million. Die size: 495 mm² versus 107 mm². Transistor density: 25.3 million per mm² versus 50.5 million per mm².

Clocks: the Vega 64 runs at 1247 MHz base and 1546 MHz boost, while the PRO W6400 runs at 2039 MHz base and 2321 MHz boost. Memory clocks: 945 MHz (1890 Mbps effective) for the Vega 64 versus 2000 MHz (16 Gbps effective) for the PRO W6400.

Memory configuration: 8 GB HBM2 on a 2048-bit bus with 483.8 GB/s bandwidth versus 4 GB GDDR6 on a 64-bit bus with 128.0 GB/s bandwidth. Shading units: 4096 versus 768. TMUs: 256 versus 48. ROPs: 64 versus 32. RT cores: none versus 12.

Pixel rate: 98.94 GPixel/s versus 74.27 GPixel/s. Texture rate: 395.8 GTexel/s versus 111.4 GTexel/s. FP32: 12.66 TFLOPS versus 3.565 TFLOPS. FP16: 25.33 TFLOPS versus 7.130 TFLOPS (both at 2:1 ratio).

TDP: 295 W versus 50 W. Slot width: dual-slot versus single-slot. Power connectors: 2x 8-pin versus none. Suggested PSU: 600 W versus 250 W. Bus interface: PCIe 3.0 x16 versus PCIe 4.0 x4.

Display outputs: 1x HDMI 2.0b plus 3x DisplayPort 1.4a versus 2x DisplayPort 1.4a. DirectX support: 12 (12_1) versus 12 Ultimate (12_2). Vulkan support: 1.3 versus 1.4. OpenGL is the same at 4.6.

Release dates: August 2017 versus January 2022. The Vega 64 has a launch MSRP of 499 USD; the PRO W6400 has no recorded launch MSRP. The Vega 64's predecessor is Polaris and successor is Navi; the PRO W6400's predecessor is Radeon Pro Vega with no successor listed.

FAQ

Q: Which card has higher raw compute performance?

A: The AMD Radeon RX Vega 64, with 12.66 TFLOPS FP32 versus the PRO W6400's 3.565 TFLOPS. In OpenCL, the Vega 64 scores 62,552 against 35,027, a 78.6% lead.

Q: Does the PRO W6400 support ray tracing?

A: Yes, it has 12 dedicated RT cores. The RX Vega 64 has no RT cores listed. The PRO W6400 also supports DirectX 12 Ultimate (12_2), while the Vega 64 is limited to DirectX 12 (12_1).

Q: How do their power requirements compare?

A: The Vega 64 has a TDP of 295 W and requires two 8-pin power connectors with a 600 W suggested PSU. The PRO W6400 has a 50 W TDP, no power connectors, and a 250 W suggested PSU.

Q: Which card has more memory bandwidth?

A: The RX Vega 64, with 483.8 GB/s across a 2048-bit HBM2 interface. The PRO W6400 offers 128.0 GB/s over a 64-bit GDDR6 bus.

Q: Are these cards still in production?

A: No, both are listed as end-of-life. The RX Vega 64 was released in August 2017, and the PRO W6400 in January 2022.

Q: How does the PRO W6400 compare to its nearest rivals?

A: Its average benchmark score of 37,157 is within 1.7% of the NVIDIA GeForce GTX TITAN X (36,530) and 1.3% behind the NVIDIA GeForce RTX 4070 (37,648). It sits in a tight performance band around the RX Vega 56, Tesla P4, and RTX 4070.

The Verdict

The data points to a clear split. The AMD Radeon RX Vega 64 is the superior choice for anyone prioritizing raw compute performance, memory bandwidth, or VRAM capacity. Its 78.6% OpenCL advantage and 70.6% Vulkan advantage over the PRO W6400 are decisive. The 8 GB HBM2 memory and 483.8 GB/s bandwidth make it suitable for large-scale compute tasks, and its 86th percentile ranking among all GPUs confirms its strength.

The AMD Radeon PRO W6400 is the better option for efficiency-focused builds or systems with strict power and space constraints. Its 50 W TDP, single-slot design, and lack of power connectors make it far easier to integrate. The 12 RT cores and DirectX 12 Ultimate support give it modern rendering features that the Vega 64 lacks. Its 80th percentile ranking shows it is still a capable performer relative to the broader GPU landscape.

For a workstation that needs maximum throughput, the Vega 64 is the clear pick. For a compact, low-power system that still needs hardware ray tracing and current API support, the PRO W6400 is the rational choice. The benchmark data does not suggest a single winner; it suggests two different tools for two different jobs. The Vega 64 dominates what it was designed for, and the PRO W6400 excels where the Vega 64 cannot compete: efficiency and modern feature support.