AMD Radeon Pro Vega 20 vs AMD Radeon RX 6800 Comparison

The AMD Radeon RX 6800 and AMD Radeon Pro Vega 20 represent two very different eras of AMD graphics, and the benchmark data reflects a generational chasm. The RX 6800, built on RDNA 2.0, decisively outperforms the older GCN 5.0-based Pro Vega 20 in most shared tests, though the Pro Vega 20 manages a single surprising victory. This analysis breaks down the head-to-head results, architectural differences, and practical use-case implications based solely on the provided data.

Head-to-Head Benchmarks

The most lopsided result appears in the Geekbench Metal test, where the RX 6800 scores 153,635 against the Pro Vega 20’s 30,427. That is a delta of 404.9%, meaning the RX 6800 is roughly five times faster in this API. Metal is Apple’s graphics framework, and while the Pro Vega 20 is explicitly tied to the "Radeon Pro Mac" generation, the RX 6800’s raw compute advantage is overwhelming. This is not a close contest; the RX 6800 simply overwhelms the older card in this workload.

The Vulkan results tell a similar story, though slightly less extreme. The RX 6800 posts 115,107, while the Pro Vega 20 manages 26,410, a delta of 335.8%. Again, the RX 6800 is multiple times faster, confirming that its architectural efficiency and higher clock speeds translate directly into cross-platform graphics performance. For any modern Vulkan-based game or application, the RX 6800 is the clear choice.

However, the OpenCL test flips the script. Here, the Pro Vega 20 wins with a score of 26,679 against the RX 6800’s 24,508, a delta of -8.1%. This is a narrow but real victory for the older card. OpenCL is often used for compute tasks rather than pure rasterization, and the Pro Vega 20’s GCN architecture, despite being older, apparently handles this specific workload better. The data shows that the Pro Vega 20 is not universally obsolete; in this particular compute benchmark, it edges out the newer card by a small margin.

In terms of overall wins, the RX 6800 takes 2 out of 3 head-to-head tests, with the Pro Vega 20 securing 1. The average benchmark score further underscores the RX 6800’s dominance: it sits at 30,095, compared to 27,839 for the Pro Vega 20. This places the RX 6800 in the 75th percentile of all GPUs, while the Pro Vega 20 sits at the 73rd percentile — a modest gap in ranking but a significant one in raw score.

FAQ

Q: Which card is faster in Geekbench Metal?

A: The AMD Radeon RX 6800 is dramatically faster, scoring 153,635 versus the Pro Vega 20’s 30,427. This represents a 404.9% advantage, making the RX 6800 approximately five times quicker in this specific test.

Q: Does the AMD Radeon Pro Vega 20 win any benchmark against the RX 6800?

A: Yes, it wins the Geekbench OpenCL test. The Pro Vega 20 scores 26,679, while the RX 6800 scores 24,508, giving the older card an 8.1% edge in that compute workload.

Q: How do their average benchmark scores compare?

A: The RX 6800 has an average benchmark score of 30,095, while the Pro Vega 20’s average is 27,839. The RX 6800’s score is roughly 8% higher overall, and it ranks in the 75th percentile of all GPUs versus the Pro Vega 20’s 73rd.

Q: What is the nearest rival to the RX 6800 based on average score?

A: The nearest rival is the NVIDIA GeForce RTX 3070 Ti, which has an average score of 29,945 — a delta of just 0.5% from the RX 6800. The AMD Radeon RX 6700 is also close, scoring 30,433, which is 1.1% higher than the RX 6800.

Q: What is the nearest rival to the Pro Vega 20 based on average score?

A: The nearest rival is the AMD Radeon RX 7800M, with an average score of 27,883, which is 0.2% higher than the Pro Vega 20’s 27,839. The AMD Radeon Pro W5500X is also near, scoring 27,973, a 0.5% delta.

Q: Which card has more memory and bandwidth?

A: The RX 6800 has 16 GB of GDDR6 memory on a 256-bit bus, providing 512.0 GB/s of bandwidth. The Pro Vega 20 has 4 GB of HBM2 on a 1024-bit bus, providing 189.4 GB/s.

The Verdict

The data is unambiguous for most users: the AMD Radeon RX 6800 is the superior performer. It wins the majority of shared benchmarks by enormous margins, particularly in Metal and Vulkan, where it is 404.9% and 335.8% faster, respectively. Its higher average benchmark score (30,095 vs. 27,839) and better percentile ranking (75th vs. 73rd) confirm that it is the more capable card overall. Anyone choosing between these two for gaming, modern graphics workloads, or general GPU compute should select the RX 6800 without hesitation.

That said, the Pro Vega 20 is not without merit. Its OpenCL victory, albeit narrow, suggests it has a specific niche in compute tasks that favor its GCN architecture. Furthermore, its 100 W TDP is significantly lower than the RX 6800’s 250 W, and it is an integrated graphics processor (IGP), which means it is designed for compact, portable systems where power draw and space are critical constraints. The Pro Vega 20 is the choice only if you are building or using a system that requires an IGP with modest compute abilities and minimal power consumption.

For the vast majority of scenarios — desktop gaming, content creation, or heavy 3D rendering — the RX 6800 is the only rational pick based on the benchmark evidence. The Pro Vega 20 is a legacy part for niche, low-power applications.

Specification Differences

The two cards differ on nearly every core specification. The RX 6800 uses a 7 nm process from TSMC, while the Pro Vega 20 uses a 14 nm process from GlobalFoundries. The RX 6800 has a base clock of 1700 MHz and a boost clock of 2105 MHz, whereas the Pro Vega 20 runs at a much lower 815 MHz base and 1283 MHz boost. Memory configurations are starkly different: the RX 6800 has 16 GB of GDDR6 on a 256-bit bus, while the Pro Vega 20 has 4 GB of HBM2 on a 1024-bit bus. Bandwidth follows, with the RX 6800 at 512.0 GB/s versus 189.4 GB/s for the Pro Vega 20.

Compute resources also diverge sharply. The RX 6800 has 3840 shading units, 240 TMUs, and 96 ROPs, while the Pro Vega 20 has 1280 shading units, 80 TMUs, and 32 ROPs. The RX 6800 also features 60 ray tracing cores, which the Pro Vega 20 lacks entirely. Pixel and texture rates reflect this gap: the RX 6800 hits 202.1 GPixel/s and 505.2 GTexel/s, compared to 41.06 GPixel/s and 102.6 GTexel/s for the Pro Vega 20. FP32 performance is 16.17 TFLOPS versus 3.284 TFLOPS, a five-fold difference. The RX 6800 uses a PCIe 4.0 x16 interface, while the Pro Vega 20 uses PCIe 3.0 x16. The RX 6800 is a dual-slot card requiring 2x 8-pin power connectors and a 600 W PSU, whereas the Pro Vega 20 is an IGP with no separate power connectors or PSU recommendation.

Architecture Differences

The architectural gap is the root cause of the performance disparity. The RX 6800 is built on RDNA 2.0, which is a major redesign from AMD’s older GCN 5.0 architecture used in the Pro Vega 20. RDNA 2.0 is designed for higher instruction-level parallelism and lower latency, which explains the RX 6800’s massive clock speed advantage (1700 MHz base vs. 815 MHz) despite having more shading units. The RX 6800 also introduces dedicated ray tracing hardware (60 RT cores), a feature entirely absent from the GCN 5.0-based Pro Vega 20.

The process node difference is critical. The RX 6800 uses TSMC’s 7 nm process, enabling 26,800 million transistors on a 520 mm² die, for a density of 51.5M transistors per mm². The Pro Vega 20 uses GlobalFoundries’ 14 nm process, and its transistor count and die size are not listed, but it is safe to say the 7 nm node allows for significantly more complexity and efficiency. The RX 6800 also supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Pro Vega 20 is limited to DirectX 12 (12_1) and Vulkan 1.3. This means the RX 6800 supports newer rendering features and is more future-proof.

The memory architecture also differs fundamentally. The RX 6800 uses GDDR6 with a 256-bit bus, while the Pro Vega 20 uses HBM2 with a 1024-bit bus. The Pro Vega 20’s wider bus is a legacy of GCN’s design, but the RX 6800’s much higher memory clock (2000 MHz vs. 740 MHz) and larger capacity (16 GB vs. 4 GB) make it far superior in bandwidth and capacity.

Where Each One Wins

The RX 6800 is the clear winner in nearly every category. It dominates in Vulkan and Metal benchmarks, making it the go-to choice for gamers and professionals using modern APIs. Its 16 GB of VRAM is essential for high-resolution textures and large datasets, and its 60 RT cores enable hardware-accelerated ray tracing, which the Pro Vega 20 cannot do. The RX 6800 is also the choice for anyone needing high pixel or texture rates — it offers 202.1 GPixel/s and 505.2 GTexel/s, versus 41.06 GPixel/s and 102.6 GTexel/s for the Pro Vega 20. For any heavy 3D workload, the RX 6800 wins decisively.

The Pro Vega 20’s only benchmark win is in OpenCL, where it beats the RX 6800 by 8.1%. This suggests it may have an edge in specific compute tasks that are optimized for GCN’s execution model. Additionally, its 100 W TDP and IGP form factor make it the only viable option for systems that cannot accommodate a discrete dual-slot card with 2x 8-pin power connectors. It is also notably the Pro Vega 20 is from the "Radeon Pro Mac" generation, implying it is designed for Apple’s portable devices, where the RX 6800’s 267 mm length and 40 mm width would never fit. If your primary constraint is power efficiency and space, the Pro Vega 20 is the winner; if it is performance, the RX 6800 is unmatched.