NVIDIA N1X 40SM vs NVIDIA RTX PRO 4000 Blackwell Comparison

Where Each One Wins

The database records two very different NVIDIA parts, both built on the Blackwell 2.0 architecture but aimed at distinct workloads. The NVIDIA N1X 40SM is an integrated graphics processor, part of the Blackwell IGP (N1x) generation, while the NVIDIA RTX PRO 4000 Blackwell is a dedicated workstation card from the Blackwell PRO W (x000) family. The recorded benchmark data is one-sided: the N1X 40SM has no benchmark entries in the database, whereas the RTX PRO 4000 Blackwell has nine recorded scores. Consequently, the win count in the head-to-head comparison sits at zero for the N1X and zero for the RTX PRO, with no shared tests available to draw direct comparisons.

Where each one wins is therefore determined by capability rather than measured results. The RTX PRO 4000 Blackwell wins on raw compute throughput, memory bandwidth, and API compatibility. Its FP32 throughput is recorded at 36.83 TFLOPS, its memory bandwidth at 672.0 GB/s, and it supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 40SM, by contrast, lists no DirectX, OpenGL, or Vulkan support in the database, marking it as a part that operates outside traditional desktop graphics APIs. The N1X does win on memory capacity, offering 128 GB of LPDDR5X against the RTX PRO's 24 GB of GDDR7, and on its integrated nature, requiring no power connectors and occupying an IGP slot width.

The RTX PRO 4000 Blackwell also wins on the only percentile data present. Its percentileVsAllGpus is 72, placing it above the majority of recorded GPUs, while the N1X sits at the 50th percentile with an average benchmark score of zero. The RTX PRO's average benchmark score of 27135 reflects its recorded results across 3DMark, Geekbench, and PassMark tests. The N1X, lacking any benchmark scores, cannot claim a measured performance win in the database.

Architecture Differences

Both processors are fabricated on a 5 nm process at TSMC, but the underlying chips differ. The N1X 40SM uses the GB20B chip with a die size of 382 mm² and transistor count listed as unknown. The RTX PRO 4000 Blackwell uses the GB203 chip with a die size of 378 mm² and a transistor count of 45,600 million, giving a transistor density of 120.6M per mm². The N1X packs more physical die area but with unrecorded transistor numbers, so density cannot be compared directly.

The core configurations diverge sharply. The N1X has 5120 shading units, 320 texture mapping units, and 40 raster output pipelines. The RTX PRO has 8960 shading units, 280 TMUs, and 96 ROPs. This means the RTX PRO has 75% more shading units and 140% more ROPs, but 12.5% fewer TMUs. Ray tracing hardware follows a similar pattern: the N1X has 40 RT cores and 160 tensor cores, while the RTX PRO has 70 RT cores (75% more) and 280 tensor cores (75% more).

Memory architecture is fundamentally different. The N1X uses LPDDR5X with a 256-bit bus and 273.2 GB/s bandwidth. The RTX PRO uses GDDR7 with a 192-bit bus and 672.0 GB/s bandwidth. Despite the narrower bus, the RTX PRO achieves 146% higher bandwidth due to faster memory clocks: 1750 MHz (28 Gbps effective) versus 1067 MHz (8.5 Gbps effective) for the N1X. Clock speeds also differ, with the N1X base at 741 MHz and boost at 2346 MHz, while the RTX PRO has a higher base of 1230 MHz but a lower boost of 2055 MHz.

The RTX PRO is a single-slot card with a 16-pin power connector and a 140 W TDP, requiring a 300 W suggested PSU. The N1X is an IGP with no power connectors and an unknown TDP. Display outputs differ as well: the N1X offers a single HDMI port, while the RTX PRO provides four DisplayPort 2.1b outputs. The RTX PRO supports modern graphics APIs, while the N1X lists N/A for DirectX, OpenGL, and Vulkan, indicating that its rendering path is not exposed through conventional desktop graphics interfaces.

Head-to-Head Benchmarks

No head-to-head benchmark entries exist in the database for these two parts. The N1X 40SM has an empty benchmarks array and an avgBenchmarkScore of 0. The RTX PRO 4000 Blackwell, however, has nine recorded scores that illustrate its measured performance profile. In 3DMark Steel Nomad DX12, it scores 4648. Geekbench Vulkan shows 194168. PassMark results span multiple DirectX versions: DirectX 9 scores 354, DirectX 10 scores 173, DirectX 11 scores 276, and DirectX 12 scores 97. PassMark G2D scores 1265, G3D scores 28427, and GPU Compute scores 14805. The average benchmark score across all recorded tests is 27135.

The nearest rivals for the RTX PRO 4000 Blackwell provide context for these numbers. The AMD Radeon RX 6700 XT posts an average score of 27425, which is 1.1% higher than the RTX PRO. The NVIDIA GeForce RTX 4070 Mobile averages 27435, also 1.1% higher. The NVIDIA GeForce RTX 3090 averages 27565, 1.6% higher. The NVIDIA RTX A4000 averages 26683, which is 1.7% lower than the RTX PRO. These deltas show the RTX PRO 4000 sitting in a tight cluster where the four nearest rivals span a range of only about 3.3 percentage points. The RTX PRO is effectively on par with the RX 6700 XT and RTX 4070 Mobile, slightly behind the RTX 3090, and slightly ahead of the RTX A4000.

The N1X has no comparable scores, so no direct numerical comparison is possible. The data indicates that the RTX PRO 4000 Blackwell delivers measured performance in the upper-middle range of all GPUs, with its 72nd percentile rank confirming that it outperforms the majority of recorded parts. The N1X, at the 50th percentile with no scores, cannot be positioned against these results.

Specification Differences

The two parts differ across nearly every measurable specification. Process node and foundry are identical: 5 nm at TSMC. Architecture is also identical: Blackwell 2.0. However, the chip, generation, and physical characteristics diverge.

• Chip: N1X uses GB20B; RTX PRO uses GB203.
• Generation: N1X is Blackwell IGP (N1x); RTX PRO is Blackwell PRO W (x000).
• Die size: N1X is 382 mm²; RTX PRO is 378 mm².
• Transistors: N1X is unknown; RTX PRO is 45,600 million.
• Transistor density: N1X is null; RTX PRO is 120.6M per mm².
• Base clock: N1X is 741 MHz; RTX PRO is 1230 MHz.
• Boost clock: N1X is 2346 MHz; RTX PRO is 2055 MHz.
• Memory clock: N1X is 1067 MHz (8.5 Gbps effective); RTX PRO is 1750 MHz (28 Gbps effective).
• Memory size: N1X is 128 GB; RTX PRO is 24 GB.
• Memory type: N1X is LPDDR5X; RTX PRO is GDDR7.
• Memory bus: N1X is 256-bit; RTX PRO is 192-bit.
• Memory bandwidth: N1X is 273.2 GB/s; RTX PRO is 672.0 GB/s.
• Shading units: N1X is 5120; RTX PRO is 8960.
• TMUs: N1X is 320; RTX PRO is 280.
• ROPs: N1X is 40; RTX PRO is 96.
• RT cores: N1X is 40; RTX PRO is 70.
• Tensor cores: N1X is 160; RTX PRO is 280.
• Pixel rate: N1X is 93.84 GPixel/s; RTX PRO is 197.3 GPixel/s.
• Texture rate: N1X is 750.7 GTexel/s; RTX PRO is 575.4 GTexel/s.
• FP32: N1X is 24.02 TFLOPS; RTX PRO is 36.83 TFLOPS.
• FP16: N1X is 24.02 TFLOPS (1:1); RTX PRO is 36.83 TFLOPS (1:1).
• TDP: N1X is unknown; RTX PRO is 140 W.
• Slot width: N1X is IGP; RTX PRO is single-slot.
• Power connectors: N1X is none; RTX PRO is 1x 16-pin.
• Suggested PSU: N1X is null; RTX PRO is 300 W.
• Display outputs: N1X is 1x HDMI; RTX PRO is 4x DisplayPort 2.1b.
• APIs: N1X lists N/A for DirectX, OpenGL, Vulkan; RTX PRO lists DirectX 12 Ultimate (12_2), OpenGL 4.6, Vulkan 1.4.
• Dimensions: N1X has null dimensions; RTX PRO is 241 mm length, 111 mm height, 20 mm width.
• Release date: N1X is 2026-05-31; RTX PRO is 2025-03-17.
• Predecessor: N1X is null; RTX PRO is Workstation Ada.
• Percentile: N1X is 50; RTX PRO is 72.
• Average benchmark score: N1X is 0; RTX PRO is 27135.

The pixel rate difference is notable: the RTX PRO delivers 197.3 GPixel/s versus 93.84 GPixel/s for the N1X, a 110% advantage. The texture rate runs the other way, with the N1X at 750.7 GTexel/s versus 575.4 GTexel/s for the RTX PRO, a 30% advantage for the integrated part despite its lower shading unit count.

FAQ

Q: Which part has more shading units?

A: The NVIDIA RTX PRO 4000 Blackwell has 8960 shading units, while the NVIDIA N1X 40SM has 5120.

Q: What is the memory bandwidth difference?

A: The RTX PRO 4000 Blackwell delivers 672.0 GB/s over a 192-bit GDDR7 bus, while the N1X 40SM delivers 273.2 GB/s over a 256-bit LPDDR5X bus. The RTX PRO has 146% higher bandwidth.

Q: Does the N1X 40SM support DirectX?

A: The database lists DirectX as N/A for the N1X 40SM. The RTX PRO 4000 Blackwell supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

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

A: The RTX PRO 4000 Blackwell has an average benchmark score of 27135. The AMD Radeon RX 6700 XT scores 27425 (1.1% higher), the NVIDIA GeForce RTX 4070 Mobile scores 27435 (1.1% higher), the NVIDIA GeForce RTX 3090 scores 27565 (1.6% higher), and the NVIDIA RTX A4000 scores 26683 (1.7% lower).

Q: What is the memory capacity of each part?

A: The N1X 40SM has 128 GB of LPDDR5X memory. The RTX PRO 4000 Blackwell has 24 GB of GDDR7 memory.

Q: Which part has the higher boost clock?

A: The N1X 40SM has a boost clock of 2346 MHz, while the RTX PRO 4000 Blackwell has a boost clock of 2055 MHz. However, the RTX PRO has a higher base clock at 1230 MHz versus 741 MHz for the N1X.