NVIDIA RTX PRO 4000 Blackwell vs NVIDIA Rubin GPU Comparison

Where Each One Wins

The recorded data separates these two NVIDIA parts into entirely different deployment categories. The RTX PRO 4000 Blackwell is a workstation-oriented card with a full set of benchmark results, while the Rubin GPU is a server-class accelerator with no recorded benchmark scores in the database. This makes a direct wins comparison impossible; the RTX PRO 4000 holds all measured wins by default, but the Rubin GPU occupies a different performance tier altogether.

The RTX PRO 4000 Blackwell posts scores across DirectX 10, 11, 12, and 9, plus Vulkan and compute workloads. Its strongest single result is the Passmark G3D score of 28,427, with a Geekbench Vulkan score of 194,168 and a Passmark GPU Compute score of 14,805. The Rubin GPU has zero recorded benchmarks, so the database shows no wins for it in any test category. The Rubin part instead wins on architectural scale: it carries 28,672 shading units versus 8,960 on the RTX PRO 4000, and its FP32 throughput of 130.0 TFLOPS is more than triple the 36.83 TFLOPS of the workstation card.

For use-case separation, the RTX PRO 4000 targets graphics-heavy workflows that require display outputs and API support. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, and it has four DisplayPort 2.1b outputs. The Rubin GPU has no display outputs and no graphics API support, which places it firmly in compute-only server territory. The data indicates that the RTX PRO 4000 wins every graphics benchmark simply because the Rubin GPU does not participate in graphics testing.

Architecture Differences

The two chips come from different process nodes and foundries. The RTX PRO 4000 uses the GB203 chip built on a 5 nm process at TSMC, with 45,600 million transistors on a 378 mm² die, giving a transistor density of 120.6M per mm². The Rubin GPU uses the GR100 chip on a 3 nm process, also at TSMC, with 336,000 million transistors on a 1,456 mm² die, giving a density of 230.8M per mm². The Rubin die is nearly four times larger and packs over seven times the transistor count.

Memory architecture differs fundamentally. The RTX PRO 4000 uses 24 GB of GDDR7 on a 192-bit bus, delivering 672.0 GB/s of bandwidth. The Rubin GPU uses 288 GB of HBM4 on a 16,384-bit bus, delivering 22.1 TB/s. That bandwidth advantage is roughly 33 times greater, and the memory capacity is 12 times larger. Clock behavior also diverges: the RTX PRO 4000 runs at a 1,230 MHz base and 2,055 MHz boost, while the Rubin GPU runs at a 700 MHz base but boosts to 2,267 MHz. The Rubin boost clock is higher, but its base clock is much lower, reflecting a server workload profile that relies on sustained memory throughput rather than raw clock speed.

Core counts and specialized units differ sharply. The RTX PRO 4000 has 280 TMUs, 96 ROPs, 70 ray tracing cores, and 280 tensor cores. The Rubin GPU has 896 TMUs, only 24 ROPs, no listed ray tracing cores, and 896 tensor cores. The low ROP count on Rubin aligns with a compute-focused design that does not prioritize rasterization output. FP16 performance also scales differently: the RTX PRO 4000 delivers 36.83 TFLOPS in both FP32 and FP16 (1:1 ratio), while the Rubin GPU delivers 130.0 TFLOPS FP32 and 260.0 TFLOPS FP16 (2:1 ratio). The Rubin part doubles its FP16 throughput relative to FP32, a common trait for AI and tensor workloads.

Power and physical design diverge completely. The RTX PRO 4000 has a 140 W TDP, is single-slot, uses one 16-pin power connector, and requires a 300 W suggested PSU. The Rubin GPU has a 2,300 W TDP, comes as an SXM module, and requires a 2,700 W suggested PSU. The Rubin card has no listed power connectors because SXM modules receive power through the socket, not through discrete cables. The RTX PRO 4000 measures 241 mm in length, 111 mm in height, and 20 mm in width; the Rubin GPU has no listed dimensions.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries between these two parts. The headToHeadBenchmarks array is empty, and the wins counters show zero for both sides. This absence of comparative test data means all benchmark comparisons must rely on the standalone scores recorded for the RTX PRO 4000 and the Rubin GPU's lack of any scores.

The RTX PRO 4000's nearest rivals provide context for its performance tier. The database lists the AMD Radeon RX 6700 XT with an average score of 27,425 and a delta of -1.1% versus the RTX PRO 4000's average of 27,135. The NVIDIA GeForce RTX 4070 Mobile scores 27,435, also -1.1% relative. The NVIDIA GeForce RTX 3090 scores 27,565, which is -1.6% relative to the RTX PRO 4000, meaning the RTX PRO 4000 trails all three by small margins. The NVIDIA RTX A4000 scores 26,683, which is +1.7% relative, meaning the RTX PRO 4000 leads that prior workstation card by nearly two percent.

The RTX PRO 4000's average benchmark score of 27,135 places it in the 72nd percentile of all GPUs in the database. Its individual scores range from a low of 97 in Passmark DirectX 12 to a high of 194,168 in Geekbench Vulkan. The Passmark G3D score of 28,427 and the Passmark GPU Compute score of 14,805 indicate strong general graphics and compute performance. The Passmark DirectX 9 score of 354 and DirectX 10 score of 173 show legacy API performance, while DirectX 11 scores 276 and DirectX 12 scores 97. The Passmark G2D score of 1,265 reflects 2D desktop workloads.

The Rubin GPU has an average benchmark score of zero and sits at the 50th percentile, which the database records as a neutral position due to the absence of test data. Its nearest rivals list is empty, so no comparative deltas exist. The implication is straightforward: the Rubin GPU's performance cannot be quantified from recorded measurements, and any direct comparison with the RTX PRO 4000 must be inferred from architectural specifications rather than benchmark results.

The Verdict

The data supports a clear split based on workload type. The RTX PRO 4000 Blackwell is the only one of the two with any recorded benchmark scores, making it the only choice for any graphics or workstation task that requires measurable performance. It has display outputs, full DirectX 12 Ultimate support, OpenGL 4.6, and Vulkan 1.4, and it fits in a single slot with a 140 W TDP. Its 24 GB of GDDR7 memory and 672.0 GB/s bandwidth suit professional visualization, rendering, and compute tasks that need a balance of capacity and speed.

The Rubin GPU is a server accelerator with no graphics outputs and no API support. Its 288 GB of HBM4 memory and 22.1 TB/s bandwidth, along with 130.0 TFLOPS FP32 and 260.0 TFLOPS FP16, position it for massive-scale compute workloads such as AI training or scientific simulation. Its 2,300 W TDP and SXM module form factor require server infrastructure, not a workstation chassis. The 2,700 W suggested PSU confirms this is a data-center component.

The RTX PRO 4000's benchmark percentile of 72 versus the Rubin GPU's 50 percentile reflects the database's treatment of unmeasured parts, not actual performance. The Rubin GPU's architectural specifications far exceed the RTX PRO 4000 in shading units (28,672 versus 8,960), memory bandwidth (22.1 TB/s versus 672.0 GB/s), and FP32 throughput (130.0 TFLOPS versus 36.83 TFLOPS). But without benchmark data, the Rubin GPU cannot be ranked against the RTX PRO 4000 in any measured test. The RTX PRO 4000's nearest rival comparison shows it sits within a tight band around the RTX 3090 and RTX 4070 Mobile, trailing them by roughly one to two percent while leading the older RTX A4000 by 1.7%.

FAQ

Q: Does the Rubin GPU outperform the RTX PRO 4000 in any benchmark?

A: No. The database contains no recorded benchmark scores for the Rubin GPU, so it cannot be compared on any measured test. The RTX PRO 4000 has nine recorded benchmark scores.

Q: Which card has more memory bandwidth?

A: The Rubin GPU has 22.1 TB/s from HBM4 on a 16,384-bit bus. The RTX PRO 4000 has 672.0 GB/s from GDDR7 on a 192-bit bus. The Rubin GPU's bandwidth is roughly 33 times higher.

Q: Can the Rubin GPU be used for graphics output?

A: No. The Rubin GPU has no display outputs and no DirectX, OpenGL, or Vulkan support. The RTX PRO 4000 has four DisplayPort 2.1b outputs and supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Q: What is the RTX PRO 4000's average benchmark score and percentile?

A: The RTX PRO 4000 has an average benchmark score of 27,135 and sits in the 72nd percentile of all GPUs in the database. The Rubin GPU has an average score of zero and a 50th percentile.

Q: How does the RTX PRO 4000 compare to its nearest rivals?

A: It trails the AMD Radeon RX 6700 XT by 1.1%, the NVIDIA GeForce RTX 4070 Mobile by 1.1%, and the NVIDIA GeForce RTX 3090 by 1.6%. It leads the NVIDIA RTX A4000 by 1.7%.

Q: Which card has more shading units?

A: The Rubin GPU has 28,672 shading units. The RTX PRO 4000 has 8,960. The Rubin GPU also has 896 tensor cores versus 280 on the RTX PRO 4000.

Specification Differences

| Field | NVIDIA RTX PRO 4000 Blackwell | NVIDIA Rubin GPU |

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

| Chip | GB203 | GR100 |

| Architecture | Blackwell 2.0 | Rubin |

| Generation | Blackwell PRO W (x000) | Server Rubin (Rxx) |

| Process Node | 5 nm | 3 nm |

| Foundry | TSMC | TSMC |

| Transistors | 45,600 million | 336,000 million |

| Die Size | 378 mm² | 1456 mm² |

| Transistor Density | 120.6M / mm² | 230.8M / mm² |

| Base Clock | 1230 MHz | 700 MHz |

| Boost Clock | 2055 MHz | 2267 MHz |

| Memory Clock | 1750 MHz 28 Gbps effective | 2695 MHz 10.8 Gbps effective |

| Memory Size | 24 GB | 288 GB |

| Memory Type | GDDR7 | HBM4 |

| Memory Bus Width | 192 bit | 16384 bit |

| Memory Bandwidth | 672.0 GB/s | 22.1 TB/s |

| Shading Units | 8960 | 28672 |

| TMUs | 280 | 896 |

| ROPs | 96 | 24 |

| RT Cores | 70 | null |

| Tensor Cores | 280 | 896 |

| Pixel Rate | 197.3 GPixel/s | 54.41 GPixel/s |

| Texture Rate | 575.4 GTexel/s | 2,031.2 GTexel/s |

| FP32 | 36.83 TFLOPS | 130.0 TFLOPS |

| FP16 | 36.83 TFLOPS (1:1) | 260.0 TFLOPS (2:1) |

| TDP | 140 W | 2300 W |

| Slot Width | Single-slot | SXM Module |

| Power Connectors | 1x 16-pin | null |

| Suggested PSU | 300 W | 2700 W |

| Bus Interface | PCIe 5.0 x16 | PCIe 6.0 x16 |

| Display Outputs | 4x DisplayPort 2.1b | No outputs |

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

| OpenGL | 4.6 | N/A |

| Vulkan | 1.4 | N/A |

| Dimensions | 241 mm x 111 mm x 20 mm | null |

| Release Date | 2025-03-17 | 2025-12-31 |

| Predecessor | Workstation Ada | Server Blackwell |

| Production Status | Active | Active |