NVIDIA N1X 48SM vs NVIDIA RTX 4000 Mobile Ada Generation Comparison

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark results for the NVIDIA N1X 48SM and the NVIDIA RTX 4000 Mobile Ada Generation. Both entries carry an average benchmark score of zero and hold a percentile ranking of 50 against all GPUs in the database. Consequently, the comparison below relies entirely on the recorded specification data, memory subsystems, and architectural characteristics rather than measured frame rates or synthetic scores.

The most striking divergence lies in raw compute throughput. The N1X 48SM delivers 28.83 TFLOPS of FP32 performance, while the RTX 4000 Mobile Ada Generation produces 24.72 TFLOPS. That difference amounts to roughly 16.6% more FP32 throughput for the N1X. In FP16, both GPUs operate at a 1:1 ratio with their FP32 figures, so the same proportional lead persists. The N1X achieves this with 6144 shading units against the RTX 4000's 7424 shading units, meaning the N1X extracts substantially more work per shader despite having fewer of them. Clock speeds explain part of this: the N1X boosts to 2346 MHz, whereas the RTX 4000 tops out at 1665 MHz. Even at base clocks, the N1X runs at 741 MHz compared to the RTX 4000's 1290 MHz, but the N1X's much higher boost ceiling flips the effective frequency comparison.

Texture throughput tells a different story. The N1X posts 900.9 GTexel/s, which is more than double the RTX 4000's 386.3 GTexel/s. The N1X packs 384 texture mapping units versus 232 on the RTX 4000, and its higher boost clock multiplies that advantage. Pixel throughput, however, favors the RTX 4000: it reaches 133.2 GPixel/s, while the N1X manages 112.6 GPixel/s. This stems from the RTX 4000's 80 raster operation units (ROPs) compared to the N1X's 48 ROPs. The N1X's higher clock cannot fully compensate for the nearly 67% ROP deficit.

Memory bandwidth also splits the comparison. The N1X uses 128 GB of LPDDR5X on a 256-bit bus, yielding 273.2 GB/s. The RTX 4000 Mobile Ada Generation uses 12 GB of GDDR6 on a 192-bit bus, delivering 432.0 GB/s. That is a 58% bandwidth advantage for the RTX 4000, despite its narrower bus. The effective memory clock on the RTX 4000 runs at 18 Gbps, while the N1X operates at 8.5 Gbps effective. The N1X compensates with a wider bus and a much larger pool of memory, but it cannot match the raw bandwidth of the RTX 4000.

Ray tracing resources differ as well. The N1X includes 48 RT cores, while the RTX 4000 has 58 RT cores. Tensor core counts also favor the RTX 4000: 232 versus 192. In both cases, the RTX 4000 carries more dedicated hardware for these workloads, though the N1X's higher clocks may narrow the practical gap in tasks that scale with frequency.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA N1X 48SM records 28.83 TFLOPS, which is 16.6% higher than the RTX 4000 Mobile Ada Generation's 24.72 TFLOPS.

Q: How do the memory sizes compare?

A: The N1X 48SM ships with 128 GB of LPDDR5X, while the RTX 4000 Mobile Ada Generation has 12 GB of GDDR6. The N1X has more than ten times the memory capacity.

Q: Which GPU offers greater memory bandwidth?

A: The RTX 4000 Mobile Ada Generation provides 432.0 GB/s, compared to the N1X 48SM's 273.2 GB/s. The RTX 4000 has a 58% bandwidth advantage despite using a 192-bit bus versus the N1X's 256-bit bus.

Q: What are the boost clock speeds of each GPU?

A: The N1X 48SM boosts to 2346 MHz, while the RTX 4000 Mobile Ada Generation boosts to 1665 MHz.

Q: Which GPU has more shading units?

A: The RTX 4000 Mobile Ada Generation has 7424 shading units, while the N1X 48SM has 6144 shading units.

Q: Do both GPUs support modern graphics APIs?

A: The RTX 4000 Mobile Ada Generation lists DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 48SM lists N/A for all three APIs in the database.

Q: What are the pixel and texture rates for each GPU?

A: The N1X 48SM produces 112.6 GPixel/s and 900.9 GTexel/s. The RTX 4000 Mobile Ada Generation produces 133.2 GPixel/s and 386.3 GTexel/s.

Architecture Differences

The N1X 48SM is built on the Blackwell 2.0 architecture, specifically the GB20B chip, and belongs to the Blackwell IGP (N1x) generation. The RTX 4000 Mobile Ada Generation uses the Ada Lovelace architecture with the AD104 chip and sits in the Ada-MW generation. Both are manufactured on a 5 nm process at TSMC, but their transistor counts and die sizes diverge sharply.

The N1X's transistor count is recorded as unknown, and its die size is 382 mm². The RTX 4000 Mobile Ada Generation contains 35,800 million transistors on a 294 mm² die, giving a transistor density of 121.8 million transistors per square millimeter. The N1X's larger die suggests a different design priority, likely driven by the massive memory pool rather than compute density alone.

The memory architectures are fundamentally different. The N1X uses LPDDR5X, which is a low-power memory typically packaged close to the processor. The RTX 4000 uses GDDR6, a dedicated graphics memory type with higher clock speeds but larger physical footprint. The N1X has a 256-bit memory bus, while the RTX 4000 uses a 192-bit bus. Despite the wider bus, the N1X's memory clock runs at 1067 MHz (8.5 Gbps effective), far below the RTX 4000's 2250 MHz (18 Gbps effective). The combination of width and clock determines the final bandwidth figures already noted.

The N1X lists its API support as N/A for DirectX, OpenGL, and Vulkan. The RTX 4000 Mobile Ada Generation supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This suggests the N1X may target a different software stack or specialized compute workloads, whereas the RTX 4000 is a conventional graphics product with full API coverage.

Both GPUs are classified as IGP (integrated graphics processor) in slot width, and both use no power connectors. The N1X's TDP is unknown, while the RTX 4000 Mobile Ada Generation draws 110 W. The N1X connects via PCIe 5.0 x16, while the RTX 4000 uses PCIe 4.0 x16. Display outputs also differ: the N1X lists a single HDMI output, while the RTX 4000's outputs are described as portable device dependent.

Specification Differences

The two GPUs diverge on nearly every major specification field.

| Specification | NVIDIA N1X 48SM | NVIDIA RTX 4000 Mobile Ada Generation |

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

| Architecture | Blackwell 2.0 | Ada Lovelace |

| Chip | GB20B | AD104 |

| Process node | 5 nm | 5 nm |

| Die size | 382 mm² | 294 mm² |

| Transistors | unknown | 35,800 million |

| Base clock | 741 MHz | 1290 MHz |

| Boost clock | 2346 MHz | 1665 MHz |

| Memory size | 128 GB | 12 GB |

| Memory type | LPDDR5X | GDDR6 |

| Memory bus width | 256 bit | 192 bit |

| Memory clock | 1067 MHz (8.5 Gbps effective) | 2250 MHz (18 Gbps effective) |

| Memory bandwidth | 273.2 GB/s | 432.0 GB/s |

| Shading units | 6144 | 7424 |

| TMUs | 384 | 232 |

| ROPs | 48 | 80 |

| RT cores | 48 | 58 |

| Tensor cores | 192 | 232 |

| Pixel rate | 112.6 GPixel/s | 133.2 GPixel/s |

| Texture rate | 900.9 GTexel/s | 386.3 GTexel/s |

| FP32 | 28.83 TFLOPS | 24.72 TFLOPS |

| FP16 | 28.83 TFLOPS | 24.72 TFLOPS |

| TDP | unknown | 110 W |

| Bus interface | PCIe 5.0 x16 | PCIe 4.0 x16 |

| Display outputs | 1x HDMI | Portable Device Dependent |

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Release date | 2026-05-31 | 2023-03-20 |

| Predecessor | none | Ampere-MW |

| Successor | none | Blackwell-MW |

The release dates differ by over three years, with the N1X appearing in the database as 2026-05-31 and the RTX 4000 as 2023-03-20. The RTX 4000 has a defined predecessor (Ampere-MW) and successor (Blackwell-MW), while the N1X lists neither. Both remain in active production status.

Where Each One Wins

Based on the recorded data, the NVIDIA N1X 48SM wins in raw FP32 and FP16 compute, texture throughput, memory capacity, and bus interface generation. Its 28.83 TFLOPS represents a meaningful lead over the RTX 4000's 24.72 TFLOPS, and its 900.9 GTexel/s texture rate is more than double the RTX 4000's 386.3 GTexel/s. The 128 GB memory capacity dwarfs the 12 GB pool on the RTX 4000, making the N1X the clear choice for workloads that require holding very large datasets locally. The PCIe 5.0 x16 interface provides double the signaling rate of the RTX 4000's PCIe 4.0 x16, which can benefit data transfer from system memory.

The RTX 4000 Mobile Ada Generation wins in memory bandwidth, pixel throughput, shading unit count, RT core count, tensor core count, and API support. Its 432.0 GB/s bandwidth exceeds the N1X by 58%, which matters for memory-bound rendering and compute tasks. The 133.2 GPixel/s pixel rate and 80 ROPs give it an edge in rasterization-heavy scenes. With 7424 shading units, 58 RT cores, and 232 tensor cores, the RTX 4000 has more parallel hardware for shader, ray tracing, and AI workloads, even if its lower clocks temper the raw throughput advantage. Full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support means it can run modern graphics applications natively, while the N1X lists no API support.

The N1X's higher boost clock (2346 MHz vs. 1665 MHz) suggests it may perform well in latency-sensitive tasks that respond to frequency, but the RTX 4000's higher base clock (1290 MHz vs. 741 MHz) indicates a more consistent sustained operating point. The N1X also carries a 110 W TDP on the RTX 4000 versus an unknown TDP for the N1X, but both are classified as IGP with no power connectors, implying they are designed for integrated or mobile environments rather than discrete add-in boards.

The Verdict

The data describes two GPUs with fundamentally different design intents. The NVIDIA N1X 48SM prioritizes compute throughput and memory capacity above all else. Its 28.83 TFLOPS FP32 performance, 900.9 GTexel/s texture rate, and 128 GB of LPDDR5X memory form a profile suited to large-scale compute, data processing, or inference workloads where the entire model or dataset must reside on the GPU. The absence of API support entries and the 5 nm process with a 382 mm² die suggest a specialized part rather than a general-purpose graphics card.

The NVIDIA RTX 4000 Mobile Ada Generation is a conventional mobile graphics processor. It offers balanced capabilities across compute, graphics, and memory. The 432.0 GB/s bandwidth, 133.2 GPixel/s pixel rate, and full API support make it a practical choice for rendering, gaming, and professional graphics applications. Its 12 GB memory capacity is substantial for a mobile part but far below the N1X. The RTX 4000 also has more RT cores and tensor cores, which positions it better for ray tracing and DLSS-style AI acceleration, assuming the software stack is supported.

For users prioritizing raw FP32 or FP16 throughput, texture-heavy workloads, or massive memory footprints, the N1X 48SM holds the advantage. For users needing high memory bandwidth, pixel throughput, broad API compatibility, or ray tracing and tensor operations, the RTX 4000 Mobile Ada Generation is the stronger option. The N1X's unknown TDP and lack of API support complicate direct adoption in standard graphics pipelines, while the RTX 4000's defined API coverage and established generation lineage make it a more straightforward integration target.

The absence of benchmark scores means no empirical performance ranking can be assigned. The specification sheet alone shows a tradeoff between compute density and memory speed. The N1X offers more raw FLOPs and texture rate, but the RTX 4000 counters with more bandwidth and pixel throughput. Each GPU wins where its architectural strengths align with the workload. The choice depends entirely on which of these recorded characteristics matters more for the intended use case.