AMD Radeon RX 6950 XT vs NVIDIA GeForce RTX 4080 SUPER Comparison

The AMD Radeon RX 6950 XT and NVIDIA GeForce RTX 4080 SUPER represent two distinct generations of high-end graphics hardware, with the data showing a decisive overall performance advantage for the NVIDIA card. Across the ten head-to-head benchmark comparisons, the RTX 4080 SUPER secures a clean sweep, winning every single test with margins ranging from a razor-thin 0.3% to a substantial 35.8%. The RX 6950 XT, built on the older RDNA 2.0 architecture, holds its ground in a few legacy tests but consistently trails in modern workloads, painting a clear picture of generational progression in GPU compute and rendering capabilities.

Head-to-Head Benchmarks

The single largest gap between the two cards appears in the demanding 3DMark Steel Nomad DX12 test, where the RTX 4080 SUPER scores 6600 against the RX 6950 XT’s 4235. That is a 35.8% deficit for the AMD card, indicating that the NVIDIA architecture handles modern DX12 rendering pipelines with far greater efficiency. This is not a marginal difference; it is a chasm that would manifest as significantly higher frame rates in contemporary titles that leverage advanced geometry and ray-tracing features.

Compute workloads show a similar trend, though the margins are slightly tighter. In Geekbench OpenCL, the RTX 4080 SUPER posts 246994, beating the RX 6950 XT’s 175410 by 29%. The Vulkan test tells a comparable story, with NVIDIA winning 226163 to 164748, a 27.2% advantage. These results suggest that the RTX 4080 SUPER’s higher FP32 throughput of 52.22 TFLOPS, compared to 23.65 TFLOPS for the RX 6950 XT, translates directly into superior raw compute performance for tasks like physics simulations, video encoding, and general-purpose GPU workloads.

The PassMark suite reveals where the RX 6950 XT manages to stay competitive. In the DirectX 11 test, the two cards are nearly inseparable, with NVIDIA winning 301 to 300, a delta of just 0.3%. This near-parity suggests that for older DirectX 11 games, the architectural differences are largely neutralized, and both cards deliver essentially identical performance. The RX 6950 XT also shows relative strength in DirectX 9, scoring 303 versus NVIDIA’s 381, a 20.5% gap that, while still a loss, is narrower than the DX12 deficit. This pattern indicates that the AMD card’s raw pixel and texture rates—295.7 GPixel/s and 739.2 GTexel/s—remain competitive in legacy rendering paths that do not heavily utilize the newer shader features.

Where Each One Wins

Given the 10-0 sweep, the RTX 4080 SUPER is the unequivocal winner across every benchmark category tested. Its victories span DirectX 10, 11, 12, and 9, as well as OpenCL, Vulkan, G2D, G3D, GPU compute, and the 3DMark Steel Nomad test. This comprehensive dominance means that for any modern gaming scenario, particularly those using DirectX 12 Ultimate features, the NVIDIA card will deliver substantially higher performance. The PassMark G3D score of 34245 versus 28070, an 18% difference, reinforces this conclusion for overall 3D rendering capability.

The RX 6950 XT, while not winning any tests, does demonstrate areas where the gap is small enough to be considered negligible in practice. The DirectX 11 result, where it trails by only 0.3%, suggests that gamers with a library of older titles will see no practical difference between the two cards. Similarly, the DirectX 9 test, with a 20.5% deficit, shows that the AMD card is still capable in legacy titles, though the NVIDIA card remains faster. For users who prioritize compute performance, the RTX 4080 SUPER’s 28.4% lead in PassMark GPU Compute (19822 vs 14199) makes it the clear choice for non-gaming workloads like rendering, machine learning inference, and scientific calculations.

Architecture Differences

The fundamental architectural split is between AMD’s RDNA 2.0 and NVIDIA’s Ada Lovelace. The RX 6950 XT uses the Navi 21 chip on a 7 nm process, housing 26,800 million transistors on a 520 mm² die. In contrast, the RTX 4080 SUPER uses the AD103 chip on a more advanced 5 nm process, packing 45,900 million transistors onto a smaller 379 mm² die. This translates to a transistor density of 121.1M / mm² for NVIDIA versus 51.5M / mm² for AMD, a measure of how much more efficiently the newer process packs logic into the same area.

Memory technology also diverges. The RX 6950 XT uses 16 GB of GDDR6 with a 576.0 GB/s bandwidth, while the RTX 4080 SUPER uses 16 GB of faster GDDR6X with a 736.3 GB/s bandwidth. This 160.3 GB/s difference in memory bandwidth is critical for high-resolution textures and data-heavy workloads, and it directly contributes to the NVIDIA card’s superior performance in modern games. The clock speeds tell a similar story: the RTX 4080 SUPER boosts to 2550 MHz, while the RX 6950 XT boosts to 2310 MHz, and the NVIDIA memory runs at 23 Gbps effective versus 18 Gbps for AMD.

Shader and compute resource counts favor NVIDIA heavily. The RTX 4080 SUPER has 10240 shading units, double the RX 6950 XT’s 5120, and it features 320 tensor cores, which the AMD card lacks entirely. While both have 80 ray-tracing cores and 320 texture mapping units, the RX 6950 XT has 128 ROPs versus NVIDIA’s 112, a small advantage for AMD in pixel output. However, NVIDIA’s FP16 performance is 52.22 TFLOPS (1:1), matching its FP32, while AMD’s FP16 is 47.31 TFLOPS (2:1), meaning NVIDIA can do more work per clock in mixed-precision tasks.

FAQ

Q: Which card has a higher average benchmark score?

A: The AMD Radeon RX 6950 XT has an average benchmark score of 55569, while the NVIDIA GeForce RTX 4080 SUPER scores 53610. This puts the AMD card 3.7% ahead of the NVIDIA card in this aggregate metric.

Q: Does the RX 6950 XT win any benchmark tests against the RTX 4080 SUPER?

A: No. In the ten head-to-head benchmark comparisons, the RTX 4080 SUPER wins all ten tests. The closest margin is in PassMark DirectX 11, where NVIDIA wins 301 to 300, a 0.3% difference.

Q: How do the memory bandwidths compare?

A: The RTX 4080 SUPER has a memory bandwidth of 736.3 GB/s using 16 GB of GDDR6X, while the RX 6950 XT has 576.0 GB/s using 16 GB of GDDR6. The NVIDIA card has a 160.3 GB/s bandwidth advantage.

Q: What are the launch MSRP values for these cards?

A: The AMD Radeon RX 6950 XT had a launch MSRP of 1,099 USD, and the NVIDIA GeForce RTX 4080 SUPER had a launch MSRP of 999 USD.

Q: Which card has more shading units?

A: The RTX 4080 SUPER has 10240 shading units, exactly double the 5120 shading units found on the RX 6950 XT. This is a primary reason for its superior compute performance.

Q: Are both cards end-of-life products?

A: Yes, both the AMD Radeon RX 6950 XT and the NVIDIA GeForce RTX 4080 SUPER have a production status of "End-of-life" according to the data.

The Verdict

The benchmark data is unambiguous: the NVIDIA GeForce RTX 4080 SUPER is the superior performer in every single test conducted. Its 35.8% lead in 3DMark Steel Nomad and 29% lead in Geekbench OpenCL demonstrate a commanding advantage in both modern gaming and compute workloads. The only metric where the RX 6950 XT comes close is PassMark DirectX 11, where a 0.3% difference is statistically negligible, meaning users of DX11 titles will not notice a practical difference.

For gamers and professionals who prioritize maximum performance in current and future DirectX 12 titles, the RTX 4080 SUPER is the clear choice. Its higher memory bandwidth, double the shading units, and tensor core support provide a robust foundation for advanced rendering techniques and AI-accelerated features. The RX 6950 XT, while still a capable card with a higher average benchmark score (55569 vs 53610), is better suited for users with a library of older games or those who value its slightly higher ROP count for specific pixel-heavy workloads. However, given that it loses all head-to-head tests, the RTX 4080 SUPER is the recommended card for anyone seeking top-tier performance across the board.

Specification Differences

| Specification | AMD Radeon RX 6950 XT | NVIDIA GeForce RTX 4080 SUPER |

|---|---|---|

| Architecture | RDNA 2.0 | Ada Lovelace |

| Process Node | 7 nm | 5 nm |

| Transistors | 26,800 million | 45,900 million |

| Die Size | 520 mm² | 379 mm² |

| Transistor Density | 51.5M / mm² | 121.1M / mm² |

| Base Clock | 1860 MHz | 2295 MHz |

| Boost Clock | 2310 MHz | 2550 MHz |

| Game Clock | 2100 MHz | N/A |

| Memory Clock | 2250 MHz (18 Gbps effective) | 1438 MHz (23 Gbps effective) |

| Memory Type | GDDR6 | GDDR6X |

| Memory Bandwidth | 576.0 GB/s | 736.3 GB/s |

| Shading Units | 5120 | 10240 |

| ROPs | 128 | 112 |

| Tensor Cores | N/A | 320 |

| FP32 Performance | 23.65 TFLOPS | 52.22 TFLOPS |

| FP16 Performance | 47.31 TFLOPS (2:1) | 52.22 TFLOPS (1:1) |

| Pixel Rate | 295.7 GPixel/s | 285.6 GPixel/s |

| Texture Rate | 739.2 GTexel/s | 816.0 GTexel/s |

| TDP | 335 W | 320 W |

| Power Connectors | 2x 8-pin | 1x 16-pin |

| Display Outputs | 1x HDMI 2.1, 2x DisplayPort 1.4a | 1x HDMI 2.1, 3x DisplayPort 1.4a |

| Dimensions (L x H x W) | 267 mm x 120 mm x 50 mm | 310 mm x 140 mm x 61 mm |

| Release Date | 2022-05-09 | 2024-01-07 |