AMD Radeon PRO W7900 vs NVIDIA Rubin GPU Comparison

Where Each One Wins

The AMD Radeon PRO W7900 and NVIDIA Rubin GPU occupy entirely different segments of the hardware spectrum. The data shows the Radeon PRO W7900 is a workstation graphics card with active benchmark results, while the NVIDIA Rubin GPU is a server-grade compute module with no recorded benchmark scores in the database. This fundamental distinction shapes every comparison between them.

The Radeon PRO W7900 wins in any scenario requiring display output, graphics API support, or traditional workstation visualization work. It ships with 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1 outputs, whereas the Rubin GPU has no display outputs at all. The W7900 also supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the Rubin GPU reports N/A for all three graphics APIs. Any workload involving real-time rendering, CAD, or content creation on a monitor falls squarely to the AMD card.

The NVIDIA Rubin GPU wins in raw compute capacity and memory scale. Its 130.0 TFLOPS FP32 performance more than doubles the W7900's 61.32 TFLOPS. The Rubin GPU delivers 288 GB of HBM4 memory versus 48 GB of GDDR6, and its 22.1 TB/s bandwidth is roughly 25 times the W7900's 864.0 GB/s. For large-scale AI training, scientific simulation, or server-side inference, the Rubin GPU is the clear choice. Its 896 tensor cores provide dedicated matrix math hardware that the W7900 lacks entirely.

The percentile data reinforces this split. The W7900 sits at the 94th percentile among all GPUs in the database, with an average benchmark score of 110,725. The Rubin GPU has no recorded scores and sits at the 50th percentile by default. Benchmarks favor the AMD card because it has measurable results; the Rubin GPU has none.

Architecture Differences

The two processors come from different architectural lineages and process nodes. The Radeon PRO W7900 uses the Navi 31 chip built on RDNA 3.0 architecture, codenamed Plum Bonito. It belongs to the Radeon Pro Navi (Navi III Series) generation and uses a 5 nm TSMC process. The die measures 529 mm² and contains 57,700 million transistors, for a density of 109.1M per mm².

The NVIDIA Rubin GPU uses the GR100 chip on the Rubin architecture, part of the Server Rubin (Rxx) generation. It moves to a 3 nm TSMC process, and the die grows to 1,456 mm² with 336,000 million transistors. That yields a density of 230.8M per mm², more than double the AMD part. The Rubin GPU's transistor count is roughly 5.8 times higher than the W7900's.

Memory architecture differs completely. The W7900 uses 48 GB of GDDR6 on a 384-bit bus. The Rubin GPU uses 288 GB of HBM4 on a 16,384-bit bus. The bus width difference is stark: 16,384 bits versus 384 bits. Memory clock rates also differ, with the W7900 running at 2250 MHz (18 Gbps effective) and the Rubin GPU at 2695 MHz (10.8 Gbps effective). The HBM4 stack delivers 22.1 TB/s aggregate bandwidth.

Shader and compute resources diverge sharply. The W7900 has 6,144 shading units, 384 TMUs, and 192 ROPs. The Rubin GPU has 28,672 shading units, 896 TMUs, and only 24 ROPs. The Rubin GPU's low ROP count confirms it is not designed for rasterization output. The W7900 includes 96 ray accelerators; the Rubin GPU's ray tracing core count is not specified. The Rubin GPU includes 896 tensor cores, while the W7900 has none listed.

The Rubin GPU's FP16 performance of 260.0 TFLOPS uses a 2:1 ratio relative to FP32, indicating dedicated half-precision hardware. The W7900's FP16 figure matches its FP32 at 61.32 TFLOPS on a 1:1 basis. Clock behavior also differs: the W7900 boosts to 2495 MHz from a 1760 MHz base, while the Rubin GPU starts at 700 MHz and boosts to 2267 MHz. The lower base clock on the Rubin GPU reflects its server workload profile.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between these two products. The win counts are zero for both. This absence of shared test data means comparison must rely on their individual recorded specifications and the W7900's benchmark entries.

The Radeon PRO W7900 has two recorded benchmark scores. In Geekbench OpenCL it scores 84,379. In Geekbench Vulkan it scores 137,070. Its average benchmark score across the database is 110,725, placing it in the 94th percentile of all GPUs. The Rubin GPU has no benchmark entries, no average score, and no percentile ranking beyond the default 50th.

The W7900's nearest rivals provide context for its standing. The NVIDIA Tesla V100 SXM2 16 GB averages 114,395, which is 3.2% ahead of the W7900. The NVIDIA RTX A5500 Mobile averages 113,944, 2.8% ahead. The AMD Radeon Pro Vega II averages 109,617, 1% behind. The AMD Radeon Pro W6600X averages 107,342, 3.2% behind. These deltas show the W7900 sitting in a tight competitive cluster, within a few percentage points of several established workstation and server parts.

The Rubin GPU's FP32 throughput of 130.0 TFLOPS is 2.12 times the W7900's 61.32 TFLOPS. Its FP16 throughput of 260.0 TFLOPS is 4.24 times the W7900's 61.32 TFLOPS. The texture rate favors the Rubin GPU at 2,031.2 GTexel/s versus 958.1 GTexel/s. The pixel rate favors the W7900 at 479.0 GPixel/s versus 54.41 GPixel/s. These figures confirm the Rubin GPU trades rasterization throughput for compute density.

Specification Differences

| Specification | AMD Radeon PRO W7900 | NVIDIA Rubin GPU |

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

| Process node | 5 nm | 3 nm |

| Transistors | 57,700 million | 336,000 million |

| Die size | 529 mm² | 1,456 mm² |

| Transistor density | 109.1M / mm² | 230.8M / mm² |

| Base clock | 1760 MHz | 700 MHz |

| Boost clock | 2495 MHz | 2267 MHz |

| Memory size | 48 GB | 288 GB |

| Memory type | GDDR6 | HBM4 |

| Memory bus | 384 bit | 16384 bit |

| Memory bandwidth | 864.0 GB/s | 22.1 TB/s |

| Shading units | 6,144 | 28,672 |

| TMUs | 384 | 896 |

| ROPs | 192 | 24 |

| Tensor cores | None listed | 896 |

| FP32 | 61.32 TFLOPS | 130.0 TFLOPS |

| FP16 | 61.32 TFLOPS (1:1) | 260.0 TFLOPS (2:1) |

| Pixel rate | 479.0 GPixel/s | 54.41 GPixel/s |

| Texture rate | 958.1 GTexel/s | 2,031.2 GTexel/s |

| TDP | 295 W | 2300 W |

| Slot width | Triple-slot | SXM Module |

| Bus interface | PCIe 4.0 x16 | PCIe 6.0 x16 |

| Display outputs | 3x DisplayPort 2.1, 1x mini-DisplayPort 2.1 | No outputs |

| DirectX | 12 Ultimate (12_2) | N/A |

| OpenGL | 4.6 | N/A |

| Vulkan | 1.4 | N/A |

| Suggested PSU | 600 W | 2700 W |

| Release date | 2023-05-25 | 2025-12-31 |

| Launch MSRP | 3,999 USD | Not listed |

The power envelope difference is enormous. The W7900 draws 295 W TDP and requires a 600 W suggested PSU, using two 8-pin connectors. The Rubin GPU draws 2300 W TDP with a 2700 W suggested PSU and uses an SXM Module form factor. The physical dimensions of the W7900 are 280 mm length, 110 mm height, and 51 mm width. The Rubin GPU's dimensions are not recorded.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA Rubin GPU delivers 130.0 TFLOPS FP32, which is 2.12 times the 61.32 TFLOPS of the AMD Radeon PRO W7900.

Q: Can the NVIDIA Rubin GPU drive displays?

A: No. The Rubin GPU lists "No outputs" for display connections, while the Radeon PRO W7900 provides 3x DisplayPort 2.1 and 1x mini-DisplayPort 2.1.

Q: How does memory bandwidth compare between the two?

A: The Rubin GPU's HBM4 memory delivers 22.1 TB/s over a 16,384-bit bus. The W7900's GDDR6 memory delivers 864.0 GB/s over a 384-bit bus. The Rubin GPU's bandwidth is approximately 25 times higher.

Q: What benchmark scores exist for each GPU?

A: The W7900 scores 84,379 in Geekbench OpenCL and 137,070 in Geekbench Vulkan, with an average of 110,725. The Rubin GPU has no recorded benchmark scores in the database.

Q: Which GPU supports DirectX, OpenGL, and Vulkan?

A: The Radeon PRO W7900 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Rubin GPU reports N/A for all three APIs.

Q: What are the power requirements?

A: The W7900 has a 295 W TDP with a 600 W suggested PSU. The Rubin GPU has a 2300 W TDP with a 2700 W suggested PSU.

The Verdict

The recorded data separates these two products cleanly by intended use. The AMD Radeon PRO W7900 is a workstation GPU with display outputs, graphics API support, and measurable benchmark results. It sits in the 94th percentile of all GPUs with an average score of 110,725. Its nearest rivals are within a few percentage points, confirming it competes with established workstation and server accelerators from its generation. Its 48 GB of GDDR6 memory and 864.0 GB/s bandwidth suit professional visualization workloads that require display output and rasterization.

The NVIDIA Rubin GPU is a server compute module with no display outputs, no graphics API support, and no benchmark scores. Its 288 GB of HBM4 memory, 22.1 TB/s bandwidth, and 896 tensor cores target large-scale compute tasks. The 130.0 TFLOPS FP32 and 260.0 TFLOPS FP16 figures place it in a different performance class entirely. The 2300 W TDP and SXM Module form factor confirm it belongs in a server chassis, not a workstation desk.

The pixel rate comparison illustrates the design divergence. The W7900 produces 479.0 GPixel/s; the Rubin GPU produces 54.41 GPixel/s. The W7900 has 192 ROPs; the Rubin GPU has 24. The Rubin GPU is not built to fill frames. It is built to process data. The W7900's 295 W TDP and triple-slot cooler make it installable in a conventional workstation. The Rubin GPU's 2300 W TDP requires infrastructure the W7900 does not need.

The choice depends entirely on workload. Professional graphics work, CAD, content creation, or any task requiring a monitor should use the Radeon PRO W7900. It has the display outputs, the API support, and the benchmark record to prove its capability. Server-side compute, AI training, or scientific simulation with massive memory requirements should use the NVIDIA Rubin GPU. Its specifications show overwhelming advantages in memory capacity, bandwidth, tensor throughput, and raw FP32 compute. The two products do not compete for the same buyer. The data confirms they serve separate markets.