AMD Radeon Pro W6900X vs NVIDIA TITAN X Pascal Comparison

Where Each One Wins

The AMD Radeon Pro W6900X and the NVIDIA TITAN X Pascal represent two distinct eras of GPU design, and the benchmark data reflects a clear generational divide. Across the two shared workloads in the database, the AMD Radeon Pro W6900X claims a decisive victory in both, leaving the NVIDIA TITAN X Pascal without a single win. This is not a close contest; it is a demonstration of how far GPU compute performance has advanced.

The AMD Radeon Pro W6900X is the clear choice for compute-heavy, cross-platform workloads. Its OpenCL score of 130,035 and Vulkan score of 148,865 are both substantially ahead of the TITAN X Pascal's figures. The data indicates that the W6900X is designed for professional environments where raw throughput in API-agnostic tasks is paramount. Its 97th percentile ranking among all GPUs places it firmly in the top tier of available hardware, and its average benchmark score of 168,574 is more than double that of its rival. This suggests it is suited for tasks like rendering, simulation, and complex data processing that leverage general-purpose compute.

The NVIDIA TITAN X Pascal, while an older design, still holds a respectable position at the 91st percentile. Its average benchmark score of 72,098, however, places it in a different performance class entirely. The TITAN X Pascal's wins are not in raw performance but in legacy compatibility and a different physical design philosophy. Its dual-slot form factor and standard PCIe 3.0 x16 interface make it a drop-in solution for conventional workstation towers, whereas the W6900X requires Apple's MPX bus interface, limiting its use to Apple's Mac Pro ecosystem. For users with an older, standard PCIe-based system who do not need the absolute highest compute throughput, the TITAN X Pascal remains a functional, if outperformed, option.

In practical terms, the use-case split is stark. The AMD Radeon Pro W6900X is for users who prioritize maximum compute performance and are working within the Apple MPX ecosystem. The NVIDIA TITAN X Pascal is for those with legacy systems seeking a high-end card from a previous generation, accepting that its compute performance is now a fraction of modern professional offerings. The benchmark results leave no ambiguity: the W6900X leads in every measured compute category.

Architecture Differences

The architectural gap between these two cards is massive, reflecting the five years of development between their release dates. The AMD Radeon Pro W6900X is built on the Navi 21 chip using the RDNA 2.0 architecture, fabricated on a 7 nm process at TSMC. This modern node allows for 26,800 million transistors packed into a 520 mm² die, yielding a transistor density of 51.5 million per square millimeter. The NVIDIA TITAN X Pascal, in contrast, uses the GP102 chip with the older Pascal architecture on a 16 nm process, also from TSMC. It houses 11,800 million transistors on a 471 mm² die, resulting in a much lower density of 25.1 million per square millimeter.

These differences translate directly into features. The RDNA 2.0 architecture in the W6900X includes 80 dedicated ray tracing cores, a feature entirely absent from the Pascal-based TITAN X Pascal. The AMD card also supports DirectX 12 Ultimate with feature level 12_2, whereas the TITAN X Pascal only reaches DirectX 12 with feature level 12_1. Both cards support OpenGL 4.6 and Vulkan 1.4, but the underlying hardware capabilities are worlds apart.

Memory technology further separates the two. The W6900X uses 32 GB of GDDR6 memory on a 256-bit bus, achieving a bandwidth of 512.0 GB/s. The TITAN X Pascal uses 12 GB of GDDR5X on a wider 384-bit bus, yet its bandwidth of 480.4 GB/s is actually lower than the AMD card's. This is a clear case where newer memory technology overcomes a narrower bus width. The W6900X also has a significant advantage in raw compute resources: 5,120 shading units, 320 texture mapping units, and 128 render output units, compared to the TITAN X Pascal's 3,584 shading units, 224 TMUs, and 96 ROPs.

The clock speeds also tell a story of architectural efficiency. The W6900X operates at a base clock of 1825 MHz and boosts to 2171 MHz, while the TITAN X Pascal runs at 1417 MHz base and 1531 MHz boost. Despite the higher clocks, the AMD card has a higher thermal design power of 300 W versus 250 W for the NVIDIA card, indicating that the RDNA 2.0 architecture uses additional power to deliver its substantial performance lead. The W6900X also supports a higher suggested power supply rating of 700 W, compared to 600 W for the TITAN X Pascal.

Head-to-Head Benchmarks

The head-to-head benchmark data in the database provides a quantitative measure of the performance gap. In the Geekbench OpenCL test, the AMD Radeon Pro W6900X scores 130,035, while the NVIDIA TITAN X Pascal scores 66,696. This represents a 95% advantage for the AMD card. The result is not a marginal improvement; it is a near-doubling of compute throughput in this API.

The Geekbench Vulkan test shows a similar pattern. The W6900X achieves 148,865 points, compared to the TITAN X Pascal's 77,499 points. This yields a delta of 92.1% in favor of the AMD card. Vulkan is a low-level API that often scales well with raw hardware resources, and the W6900X's superior shading unit count, higher clocks, and modern architecture produce a commanding lead.

These two benchmarks, while not exhaustive, are representative of the overall compute performance difference. The average benchmark score for the W6900X is 168,574, which puts it 1.5% ahead of the NVIDIA RTX 4500 Ada Generation, 2% ahead of the NVIDIA RTX A5500, 2.2% ahead of the AMD Radeon PRO W7800, and 3.7% ahead of the NVIDIA A100 PCIe 40 GB. This places it in the upper echelon of professional GPUs, competing directly with the latest offerings from both AMD and NVIDIA.

The TITAN X Pascal, with an average score of 72,098, sits in a much lower performance tier. Its closest rivals are the AMD Radeon Pro Vega 64, which is 0.4% slower, and the AMD Radeon Vega Frontier Edition, which is 1.7% faster. It also trades blows with the AMD Radeon RX 6650M, which is 0.5% slower, and the AMD Radeon RX 6600 LE, which is 1.8% slower. This places the TITAN X Pascal in the same performance class as mid-range to high-end mobile GPUs from a later generation, highlighting its age relative to the W6900X.

FAQ

Q: Which GPU has higher raw compute performance in OpenCL?

A: The AMD Radeon Pro W6900X, with a Geekbench OpenCL score of 130,035, is 95% ahead of the NVIDIA TITAN X Pascal, which scores 66,696.

Q: Does the NVIDIA TITAN X Pascal support ray tracing?

A: No. The NVIDIA TITAN X Pascal is based on the Pascal architecture, which has no dedicated ray tracing cores. The AMD Radeon Pro W6900X, using RDNA 2.0, includes 80 ray tracing cores.

Q: How much memory does each card have?

A: The AMD Radeon Pro W6900X has 32 GB of GDDR6 memory on a 256-bit bus with 512.0 GB/s bandwidth. The NVIDIA TITAN X Pascal has 12 GB of GDDR5X memory on a 384-bit bus with 480.4 GB/s bandwidth.

Q: Which card has a higher boost clock?

A: The AMD Radeon Pro W6900X boosts to 2171 MHz, while the NVIDIA TITAN X Pascal boosts to 1531 MHz.

Q: What is the performance percentile of each GPU?

A: The AMD Radeon Pro W6900X is in the 97th percentile of all GPUs, while the NVIDIA TITAN X Pascal is in the 91st percentile.

Q: Which card uses a standard PCIe interface?

A: The NVIDIA TITAN X Pascal uses PCIe 3.0 x16. The AMD Radeon Pro W6900X uses Apple's MPX bus interface, which is not a standard PCIe slot.

Specification Differences

The following table highlights the key differences in specifications between the two cards, based solely on the recorded data.

| Specification | AMD Radeon Pro W6900X | NVIDIA TITAN X Pascal |

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

| Architecture | RDNA 2.0 | Pascal |

| Process Node | 7 nm | 16 nm |

| Transistors | 26,800 million | 11,800 million |

| Die Size | 520 mm² | 471 mm² |

| Transistor Density | 51.5M / mm² | 25.1M / mm² |

| Base Clock | 1825 MHz | 1417 MHz |

| Boost Clock | 2171 MHz | 1531 MHz |

| Memory Size | 32 GB | 12 GB |

| Memory Type | GDDR6 | GDDR5X |

| Memory Bus Width | 256 bit | 384 bit |

| Memory Bandwidth | 512.0 GB/s | 480.4 GB/s |

| Memory Clock | 2000 MHz (16 Gbps effective) | 1251 MHz (10 Gbps effective) |

| Shading Units | 5120 | 3584 |

| Texture Mapping Units | 320 | 224 |

| Render Output Units | 128 | 96 |

| Ray Tracing Cores | 80 | None |

| Pixel Rate | 277.9 GPixel/s | 147.0 GPixel/s |

| Texture Rate | 694.7 GTexel/s | 342.9 GTexel/s |

| FP32 Performance | 22.23 TFLOPS | 10.97 TFLOPS |

| FP16 Performance | 44.46 TFLOPS (2:1) | 171.5 GFLOPS (1:64) |

| Thermal Design Power | 300 W | 250 W |

| Suggested PSU | 700 W | 600 W |

| Slot Width | Not specified | Dual-slot |

| Power Connectors | Not specified | 1x 6-pin + 1x 8-pin |

| Bus Interface | Apple MPX | PCIe 3.0 x16 |

| Display Outputs | 1x HDMI 2.1, 4x Thunderbolt | 1x DVI, 1x HDMI 2.0, 3x DisplayPort 1.4a |

| DirectX Support | 12 Ultimate (12_2) | 12 (12_1) |

| Dimensions (Length) | 267 mm (10.5 inches) | 267 mm (10.5 inches) |

| Dimensions (Height) | 120 mm (4.7 inches) | 112 mm (4.4 inches) |

| Dimensions (Width) | Not specified | 40 mm (1.6 inches) |

| Release Date | 2021-08-02 | 2016-08-01 |

| Launch MSRP | 5,999 USD | 1,199 USD |