NVIDIA GeForce RTX 5070 Mobile vs NVIDIA N1X 40SM Comparison

Head-to-Head Benchmarks

The NVIDIA GeForce RTX 5070 Mobile has a substantial recorded benchmark history in the database, while the NVIDIA N1X 40SM has no benchmark entries at all. This asymmetry shapes the comparison: the RTX 5070 Mobile can be positioned against established desktop parts, whereas the N1X 40SM must be assessed purely through its architectural specifications.

The RTX 5070 Mobile delivers an average benchmark score of 29,928 across all recorded tests. This places it at the 75th percentile among all GPUs in the database. Its nearest rivals in the rankings are tightly clustered. The NVIDIA GeForce RTX 3070 Ti averages 29,945, which is only 0.1% higher than the RTX 5070 Mobile. The NVIDIA GeForce RTX 2080 Ti averages 29,783, sitting 0.5% below. The AMD Radeon RX 6800 averages 30,095, putting it 0.6% ahead. The AMD Radeon RX 6700 averages 30,433, which is 1.7% above the RTX 5070 Mobile. These deltas are small enough that the RTX 5070 Mobile effectively trades blows with a wide range of previous-generation high-end desktop cards, landing within a narrow performance band rather than establishing clear dominance over any single rival.

Looking at individual workloads, the RTX 5070 Mobile shows distinct strengths. In Geekbench OpenCL, it scores 122,238, and in Geekbench Vulkan, it scores 116,960. These two compute-oriented tests produce the highest raw numbers in its benchmark set. The PassMark suite tells a different story across API generations. The DirectX 9 score is 214, DirectX 10 scores 129, DirectX 11 scores 192, and DirectX 12 scores 93. The DirectX 12 result is notably lower than the older API results, suggesting that the mobile part does not scale as well under modern graphics workloads relative to its compute performance. The PassMark G3D score of 20,355 and the GPU compute score of 8,279 round out the picture, with the 2D score at 896.

The N1X 40SM has no benchmark scores recorded in the database. Its average benchmark score is listed as 0, and it has no nearest rivals. This means no direct head-to-head test results exist between the two parts. The comparison must instead rely on the architectural data, where the N1X 40SM offers substantially higher theoretical throughput in several key metrics. Its FP32 compute is rated at 24.02 TFLOPS, which is 83% above the RTX 5070 Mobile's 13.13 TFLOPS. Its pixel rate of 93.84 GPixel/s is 37% higher than the 68.40 GPixel/s of the RTX 5070 Mobile. Its texture rate of 750.7 GTexel/s is more than three times the 205.2 GTexel/s of the mobile part. These figures indicate that the N1X 40SM has dramatically more raw shading and texturing capacity, assuming the reported boost clock is sustained.

However, the N1X 40SM's memory configuration is comparatively constrained. It uses 128 GB of LPDDR5X memory on a 256-bit bus, yielding 273.2 GB/s of bandwidth. The RTX 5070 Mobile uses 8 GB of GDDR7 on a 128-bit bus but achieves 384.0 GB/s of bandwidth. The mobile part therefore delivers 40% more memory bandwidth despite having half the bus width, a direct result of the much faster GDDR7 memory running at 1500 MHz with 24 Gbps effective data rate versus the LPDDR5X at 1067 MHz with 8.5 Gbps effective.

Architecture Differences

Both GPUs are built on the Blackwell 2.0 architecture and use a 5 nm process from TSMC. The RTX 5070 Mobile uses the GB206 chip, while the N1X 40SM uses the GB20B chip. The RTX 5070 Mobile belongs to the GeForce 50 Mobile generation, whereas the N1X 40SM belongs to the Blackwell IGP (N1x) generation. This distinction matters: the N1X 40SM is designed as an integrated graphics processor, with a slot width of IGP and no power connectors, same as the RTX 5070 Mobile which also has a slot width of IGP and no power connectors. Both use a PCIe 5.0 x16 bus interface.

The transistor counts differ substantially. The RTX 5070 Mobile packs 21,900 million transistors into an 181 mm² die, giving a transistor density of 121.0 million per square millimeter. The N1X 40SM has a larger die at 382 mm², but its transistor count is listed as unknown, so no density figure can be derived. The larger die area suggests a more complex implementation, consistent with its higher shading unit count.

The core configurations diverge in nearly every respect. The RTX 5070 Mobile has 4,608 shading units, 144 texture mapping units, 48 render output units, 36 ray tracing cores, and 144 tensor cores. The N1X 40SM has 5,120 shading units, 320 texture mapping units, 40 render output units, 40 ray tracing cores, and 160 tensor cores. The N1X 40SM leads in shading units by 11%, in texture mapping units by 122%, in render output units by 20% (though the count is lower in absolute terms: 40 versus 48, meaning the RTX 5070 Mobile actually has 20% more ROPs), in ray tracing cores by 11%, and in tensor cores by 11%. Correcting the ROP comparison: the RTX 5070 Mobile has 48 ROPs versus 40 on the N1X 40SM, so the mobile part holds a 20% advantage in pixel output capacity per clock. The N1X 40SM compensates with a much higher boost clock.

Clock speeds are a major differentiator. The RTX 5070 Mobile runs at a base clock of 907 MHz and a boost clock of 1425 MHz. The N1X 40SM runs at a base clock of 741 MHz and a boost clock of 2346 MHz. The N1X 40SM's boost clock is 64% higher than the RTX 5070 Mobile's. That clock advantage, combined with more shading units and texture units, explains the large gaps in FP32, pixel rate, and texture rate. The RTX 5070 Mobile has a higher base clock by 22%, but boost behavior favors the N1X 40SM decisively.

Memory architecture also differs fundamentally. The RTX 5070 Mobile uses 8 GB of GDDR7 with a 128-bit bus and 384.0 GB/s bandwidth. The N1X 40SM uses 128 GB of LPDDR5X with a 256-bit bus and 273.2 GB/s bandwidth. The memory clock figures reflect this: the RTX 5070 Mobile's memory runs at 1500 MHz with 24 Gbps effective, while the N1X 40SM's memory runs at 1067 MHz with 8.5 Gbps effective. The N1X 40SM offers 16 times the capacity but 29% less bandwidth.

API support diverges sharply. The RTX 5070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 40SM lists DirectX as N/A, OpenGL as N/A, and Vulkan as N/A. This is a critical limitation for the N1X 40SM in any gaming or general graphics workload that relies on these standard APIs. The RTX 5070 Mobile is fully compliant with modern graphics stacks, while the N1X 40SM appears to be designed for a different software ecosystem, likely tied to its IGP role in a system-on-chip context.

The display outputs also differ. The RTX 5070 Mobile has display outputs described as "Portable Device Dependent," meaning the actual ports depend on the laptop design. The N1X 40SM has a single HDMI output. This reinforces the integrated nature of the N1X 40SM.

The release dates are separated by over a year. The RTX 5070 Mobile was released on April 14, 2025, and the N1X 40SM on May 31, 2026. The RTX 5070 Mobile has a predecessor in the GeForce 40 Mobile series, while the N1X 40SM has no predecessor listed. Both are marked as Active in production status.

FAQ

Q: Which GPU has higher raw compute throughput?

A: The N1X 40SM. Its FP32 rating is 24.02 TFLOPS versus 13.13 TFLOPS for the RTX 5070 Mobile, a difference of roughly 83%. FP16 is also 24.02 TFLOPS on the N1X 40SM versus 13.13 TFLOPS on the RTX 5070 Mobile, both at a 1:1 ratio.

Q: Why does the RTX 5070 Mobile have more memory bandwidth despite a smaller bus?

A: The RTX 5070 Mobile uses GDDR7 memory running at 1500 MHz with 24 Gbps effective data rate on a 128-bit bus, producing 384.0 GB/s. The N1X 40SM uses LPDDR5X at 1067 MHz with 8.5 Gbps effective on a 256-bit bus, producing 273.2 GB/s. The faster GDDR7 memory more than compensates for the narrower bus.

Q: Does the N1X 40SM support DirectX or Vulkan?

A: No. The database lists DirectX, OpenGL, and Vulkan all as N/A for the N1X 40SM. The RTX 5070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: How does the RTX 5070 Mobile compare to desktop GPUs like the RTX 3070 Ti?

A: The RTX 5070 Mobile's average benchmark score of 29,928 is 0.1% below the RTX 3070 Ti's 29,945. It is 0.5% above the RTX 2080 Ti's 29,783, 0.6% below the RX 6800's 30,095, and 1.7% below the RX 6700's 30,433. The differences are small, placing it in a tight performance cluster.

Q: What is the memory capacity difference?

A: The N1X 40SM has 128 GB of LPDDR5X memory, which is 16 times the 8 GB of GDDR7 on the RTX 5070 Mobile. However, the RTX 5070 Mobile delivers 384.0 GB/s bandwidth versus 273.2 GB/s for the N1X 40SM.

Q: Which GPU has more render output units?

A: The RTX 5070 Mobile has 48 ROPs, while the N1X 40SM has 40 ROPs. The RTX 5070 Mobile therefore has 20% more ROPs, though the N1X 40SM achieves a higher pixel rate of 93.84 GPixel/s versus 68.40 GPixel/s due to its much higher boost clock.

Specification Differences

The following specifications differ between the two GPUs. The RTX 5070 Mobile uses the GB206 chip; the N1X 40SM uses the GB20B. The RTX 5070 Mobile has 21,900 million transistors on a 181 mm² die with a density of 121.0M per mm²; the N1X 40SM has an unknown transistor count on a 382 mm² die with no density listed. The base clock is 907 MHz for the RTX 5070 Mobile and 741 MHz for the N1X 40SM. The boost clock is 1425 MHz versus 2346 MHz. Memory clock is 1500 MHz with 24 Gbps effective for the RTX 5070 Mobile versus 1067 MHz with 8.5 Gbps effective for the N1X 40SM. Memory size is 8 GB versus 128 GB. Memory type is GDDR7 versus LPDDR5X. Bus width is 128 bit versus 256 bit. Bandwidth is 384.0 GB/s versus 273.2 GB/s. Shading units are 4,608 versus 5,120. TMUs are 144 versus 320. ROPs are 48 versus 40. RT cores are 36 versus 40. Tensor cores are 144 versus 160. Pixel rate is 68.40 GPixel/s versus 93.84 GPixel/s. Texture rate is 205.2 GTexel/s versus 750.7 GTexel/s. FP32 is 13.13 TFLOPS versus 24.02 TFLOPS. FP16 is also 13.13 TFLOPS versus 24.02 TFLOPS, both at 1:1. TDP is 50 W for the RTX 5070 Mobile versus unknown for the N1X 40SM. Display outputs are "Portable Device Dependent" versus "1x HDMI." DirectX support is 12 Ultimate (12_2) versus N/A. OpenGL support is 4.6 versus N/A. Vulkan support is 1.4 versus N/A. Release dates are April 14, 2025 versus May 31, 2026. The RTX 5070 Mobile has a predecessor (GeForce 40 Mobile); the N1X 40SM has none. The average benchmark score is 29,928 versus 0. The percentile rank is 75 versus 50.

The Verdict

The data presents two very different products. The NVIDIA GeForce RTX 5070 Mobile is a fully realized mobile graphics processor with a complete benchmark profile, modern API support, and performance that sits within 1.7% of several established desktop-class GPUs. Its 75th percentile rank among all GPUs indicates solid mainstream-to-high-end positioning. The recorded scores show strong compute performance in Geekbench OpenCL and Vulkan, while PassMark results reveal more modest DirectX performance, particularly in DirectX 12 where it scores 93 versus 192 in DirectX 11.

The NVIDIA N1X 40SM is architecturally more ambitious in raw throughput. Its FP32 output of 24.02 TFLOPS, texture rate of 750.7 GTexel/s, and pixel rate of 93.84 GPixel/s all exceed the RTX 5070 Mobile by wide margins. The 128 GB memory capacity is unprecedented for a GPU in this database. But these strengths come with caveats. The lack of DirectX, OpenGL, and Vulkan support means it cannot run standard graphics workloads through conventional APIs. The lower memory bandwidth of 273.2 GB/s could bottleneck its high compute throughput in memory-intensive tasks. The absence of any benchmark scores leaves its real-world performance unverified.

For a user seeking a mobile GPU for gaming, general graphics, or compute workloads that rely on DirectX 12 Ultimate, OpenGL 4.6, or Vulkan 1.4, the RTX 5070 Mobile is the only viable choice between these two. It has recorded data confirming its capability, and its API support covers the full modern graphics stack. For a user with workloads that do not depend on those APIs and that can leverage massive memory capacity alongside high FP32 throughput, the N1X 40SM offers a different profile, but its unknown TDP, unverified performance, and lack of standard API support make it a speculative option.

The RTX 5070 Mobile should be selected when compatibility with established graphics software matters. The N1X 40SM should be considered only when the workload explicitly requires 128 GB of memory or when the higher theoretical compute rates can be exploited outside conventional graphics APIs. The recorded data does not support any conclusion that the N1X 40SM outperforms the RTX 5070 Mobile in standard benchmarks, because no such measurements exist. The verdict, strictly from the database, is that the RTX 5070 Mobile is the proven, measurable product, while the N1X 40SM remains an architectural specification without empirical validation.