AMD Radeon Pro Vega II vs AMD Radeon PRO W6800 Comparison

The AMD Radeon PRO W6800 and the AMD Radeon Pro Vega II represent two distinct eras of AMD’s professional graphics lineup, and the benchmark data reflects a clear generational shift. While both cards target demanding workstation workloads and ship with 32 GB of memory, their underlying architectures and performance profiles diverge sharply. The data shows that the W6800, built on RDNA 2.0, decisively outperforms the older GCN 5.1-based Vega II across every tested workload, though the Vega II retains specific strengths in memory bandwidth and Apple ecosystem integration that may matter for niche professional use cases.

Head-to-Head Benchmarks

The most striking result in the head-to-head comparison is in the Geekbench Metal test, where the AMD Radeon PRO W6800 scores 174420 against the Radeon Pro Vega II’s 130183. That translates to a 34% advantage for the newer card, the largest margin of victory in any single benchmark. Metal performance is particularly relevant for macOS-centric workflows, and this gap suggests the W6800 offers a substantially smoother experience in GPU-accelerated applications that rely on Apple’s graphics API, despite being a PC-oriented card.

In the Geekbench OpenCL test, the W6800 again takes the lead, posting 121808 versus the Vega II’s 99048. This is a 23% delta, a significant but slightly narrower margin than Metal. OpenCL remains a common cross-platform compute standard, so this result indicates that the W6800’s architectural advantages in compute throughput translate broadly across different software stacks. The Vega II’s older GCN design simply cannot keep pace with the RDNA 2.0 implementation in raw FP32 and FP16 workloads.

The Vulkan benchmark shows the closest contest, with the W6800 scoring 109961 and the Vega II scoring 99621, a 10.4% difference. While the W6800 still wins, the smaller margin hints that Vulkan’s lower-level access may partially mitigate the architectural gap, or that the Vega II’s high memory bandwidth helps in certain draw-call-heavy scenarios. Still, the outcome is unambiguous: the W6800 wins all three head-to-head tests, giving it a clean 3-0 record in this comparison.

Looking at average benchmark scores across all tested applications, the W6800’s 135396 average is 23.5% higher than the Vega II’s 109617. This aggregate figure reinforces the per-test results and suggests the W6800’s advantage is consistent rather than workload-specific. The W6800 also sits at the 96th percentile among all GPUs, while the Vega II ranks at the 94th, a modest but meaningful difference in overall positioning within the broader GPU landscape.

Where Each One Wins

The AMD Radeon PRO W6800 wins in every benchmark category tested, making it the clear choice for users prioritizing raw compute performance, modern API support, and future-proofing. Its 34% Metal advantage is particularly notable for professionals using macOS or cross-platform tools that leverage Metal for rendering or machine learning tasks. The 23% OpenCL lead matters for scientific computing, engineering simulations, and other compute-heavy workloads that depend on OpenCL kernels. The 10.4% Vulkan edge, while smaller, still gives the W6800 the upper hand in Vulkan-based game engines, real-time visualization tools, and emerging graphics applications.

The Radeon Pro Vega II, despite losing every benchmark, still has a distinct role. Its 32 GB of HBM2 memory with a 4096-bit bus delivers 825.3 GB/s of bandwidth, which is 61% higher than the W6800’s 512.0 GB/s from its 256-bit GDDR6 configuration. For workloads that are memory-bandwidth-bound — such as large dataset processing, certain scientific visualizations, or multi-stream video editing — the Vega II’s superior bandwidth can compensate for its lower compute throughput. Additionally, the Vega II uses the Apple MPX bus interface and offers 4x Thunderbolt outputs alongside a single HDMI 2.0b port, making it a far more natural fit for Mac Pro systems, whereas the W6800’s 6x mini-DisplayPort 1.4a outputs and PCIe 4.0 x16 interface target traditional PC workstations.

For users on a modern PC platform with PCIe 4.0 support, the W6800’s interface advantage is clear. The Vega II’s Apple MPX connector limits it to Apple’s proprietary ecosystem, and its quad-slot cooling design (versus the W6800’s dual-slot) also makes physical installation more challenging in standard PC cases. Power consumption also differs dramatically: the W6800 draws 250 W with a 600 W suggested PSU, while the Vega II draws 475 W and needs an 850 W PSU. This makes the W6800 significantly easier to integrate into existing workstations.

Architecture Differences

The fundamental architectural divide is between RDNA 2.0 and GCN 5.1. The W6800 uses the Navi 21 chip, fabricated on TSMC’s 7 nm process, with 26,800 million transistors on a 520 mm² die. The Vega II uses the Vega 20 chip, also on TSMC’s 7 nm process, but packs only 13,230 million transistors on a 331 mm² die. This means the W6800 has more than double the transistor count and a 51.5M / mm² density versus the Vega II’s 40.0M / mm², reflecting the newer architecture’s higher complexity per square millimeter.

The W6800 features 3840 shading units, 240 TMUs, and 96 ROPs, while the Vega II has 4096 shading units, 256 TMUs, but only 64 ROPs. Despite having fewer shading units, the W6800 achieves higher pixel and texture rates: 222.9 GPixel/s and 557.3 GTexel/s versus the Vega II’s 110.1 GPixel/s and 440.3 GTexel/s. The W6800’s ROP advantage is substantial, and its clock speeds tell much of the story — the boost clock reaches 2322 MHz versus the Vega II’s 1720 MHz. This 35% clock advantage helps the W6800 overcome the Vega II’s raw unit count deficit.

Compute performance follows the same pattern. The W6800 delivers 17.83 TFLOPS FP32 and 35.67 TFLOPS FP16 (2:1), while the Vega II manages 14.09 TFLOPS FP32 and 28.18 TFLOPS FP16 (2:1). That’s a 26.5% FP32 advantage and a 26.6% FP16 advantage for the W6800. Critically, the W6800 also includes 60 dedicated ray tracing cores, a feature entirely absent from the Vega II, which has no RT cores at all. This makes the W6800 compatible with DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Vega II is limited to DirectX 12 (12_1) and Vulkan 1.3. For any modern rendering pipeline that uses ray tracing or mesh shaders, the W6800 is the only viable option here.

Memory architecture is where the Vega II pushes back. The W6800 uses 32 GB of GDDR6 on a 256-bit bus, yielding 512.0 GB/s. The Vega II uses 32 GB of HBM2 on a 4096-bit bus, yielding 825.3 GB/s. The 61% bandwidth advantage for the Vega II is real and measurable, but it comes with trade-offs: HBM2 is more expensive and the 4096-bit bus requires a larger, more complex PCB, which is why the Vega II is a quad-slot card versus the W6800’s dual-slot design. The Vega II also has a much lower memory clock (806 MHz effective 1612 Mbps) versus the W6800’s 2000 MHz (16 Gbps effective), but the bus width more than compensates.

FAQ

Q: Which GPU has higher raw compute performance?

A: The AMD Radeon PRO W6800, with 17.83 TFLOPS FP32 versus the Radeon Pro Vega II’s 14.09 TFLOPS FP32. The W6800 also leads in FP16 at 35.67 TFLOPS versus 28.18 TFLOPS.

Q: Does the Radeon Pro Vega II have any advantage over the W6800?

A: Yes, in memory bandwidth. The Vega II’s HBM2 memory on a 4096-bit bus delivers 825.3 GB/s, which is 61% higher than the W6800’s 512.0 GB/s from GDDR6 on a 256-bit bus.

Q: Can the Radeon Pro Vega II handle ray tracing workloads?

A: No. The Vega II has zero ray tracing cores, while the W6800 includes 60 RT cores. This also means the Vega II lacks DirectX 12 Ultimate support, capping it at DirectX 12 (12_1).

Q: What are the power requirements for each card?

A: The W6800 has a 250 W TDP and recommends a 600 W PSU, while the Vega II has a 475 W TDP and recommends an 850 W PSU. The W6800 uses a 1x 6-pin + 1x 8-pin connector setup.

Q: Which card is better for Mac Pro systems?

A: The Radeon Pro Vega II, due to its Apple MPX bus interface and 4x Thunderbolt outputs. The W6800 uses PCIe 4.0 x16 and offers 6x mini-DisplayPort 1.4a, which is not natively compatible with Apple’s MPX slot.

Q: How do their benchmark scores compare?

A: The W6800 wins all three head-to-head tests: 174420 versus 130183 in Metal (34% lead), 121808 versus 99048 in OpenCL (23% lead), and 109961 versus 99621 in Vulkan (10.4% lead). The W6800’s average benchmark score is 135396 compared to the Vega II’s 109617.

The Verdict

The benchmark data makes the choice straightforward for most users: the AMD Radeon PRO W6800 is the superior card by every measured performance metric. It wins all three head-to-head benchmarks with margins ranging from 10.4% to 34%, offers ray tracing capability that the Vega II completely lacks, consumes less power (250 W versus 475 W), and fits in a standard dual-slot PCIe 4.0 configuration. Its 96th percentile ranking among all GPUs versus the Vega II’s 94th further confirms its higher standing. For professionals on PC workstations running modern APIs, the W6800 is the clear pick.

The Radeon Pro Vega II, however, should not be dismissed outright. Its 825.3 GB/s memory bandwidth is a genuine asset for bandwidth-sensitive workloads, and its Apple MPX interface makes it the only sensible choice for Mac Pro users who cannot use the W6800’s PCIe interface. The Vega II’s quad-slot design and 475 W TDP are liabilities, but for those already invested in Apple’s ecosystem, it remains the functional option. The data says the W6800 is faster across the board, but the Vega II still serves a specific, narrowing niche. Users who prioritize raw speed, modern features, and efficiency should take the W6800; users locked into Mac Pro hardware with bandwidth-heavy tasks may still find the Vega II adequate.