NVIDIA GeForce RTX 4070 Mobile vs NVIDIA N1X 48SM Comparison

Head-to-Head Benchmarks

The database contains a complete benchmark record for the NVIDIA GeForce RTX 4070 Mobile, but no recorded benchmark scores for the NVIDIA N1X 48SM. The N1X 48SM entry shows an average benchmark score of 0, with an empty benchmark array and no nearest rivals. This means the head-to-head comparison relies entirely on theoretical specifications and architectural differences rather than direct measured performance data.

The RTX 4070 Mobile delivers a Geekbench OpenCL score of 109,197 and a Geekbench Vulkan score of 108,367. In Passmark tests, it scores 116 in DirectX 10, 179 in DirectX 11, 85 in DirectX 12, and 223 in DirectX 9. The Passmark G2D score is 763, while the G3D score reaches 19,587. The GPU compute score is 8,399. These results place the RTX 4070 Mobile at the 73rd percentile among all GPUs in the database, with an average benchmark score of 27,435.

The RTX 4070 Mobile sits within a tight competitive cluster. The AMD Radeon RX 6700 XT averages 27,425, a delta of 0%, meaning the two are effectively tied. The NVIDIA GeForce RTX 3090 averages 27,565, putting it 0.5% ahead of the RTX 4070 Mobile. The NVIDIA RTX PRO 4000 Blackwell averages 27,135, which is 1.1% behind. The AMD Radeon Pro Vega 20 averages 27,839, placing it 1.5% ahead. These deltas indicate the RTX 4070 Mobile performs within a 2% band across these four rivals, a remarkably narrow spread.

For the N1X 48SM, no comparable benchmark data exists. Its percentile rank of 50 is a default placeholder rather than a measured position. The absence of scores means the database cannot confirm its real-world performance relative to the RTX 4070 Mobile or any other GPU. The theoretical specifications, however, suggest a substantial performance advantage on paper, which the recorded data cannot verify.

The Verdict

Based strictly on recorded data, the RTX 4070 Mobile is the only option with verified benchmark results. It holds a 73rd percentile ranking among all GPUs, with an average score of 27,435. The N1X 48SM has no benchmark scores, no nearest rivals, and an average score of zero. Any selection between these two must therefore account for the fact that the N1X 48SM's performance is unmeasured in the database.

For users who require confirmed performance data, the RTX 4070 Mobile is the defensible choice. Its scores are documented across nine different benchmark tests, and its competitive position against four named rivals is clear. The N1X 48SM offers no such evidence. Its theoretical specifications indicate a higher compute capacity, but without measured results, the database cannot validate that advantage.

The N1X 48SM targets a different use case entirely. It is an IGP with 128 GB of LPDDR5X memory, a 256-bit bus, and 28.83 TFLOPS of FP32 compute. These are specifications that suggest a workstation or server-oriented part, not a conventional mobile GPU. The RTX 4070 Mobile is a discrete GeForce part with 8 GB of GDDR6 memory and 15.62 TFLOPS. The N1X 48SM's memory capacity alone is 16 times larger, which points to workloads involving large datasets that the RTX 4070 Mobile cannot accommodate.

The data supports a simple split: the RTX 4070 Mobile for users who need verified performance numbers and a proven competitive position, the N1X 48SM for users whose workload requires its specific memory and compute configuration, accepting that its performance is unverified in the database.

Architecture Differences

The RTX 4070 Mobile uses the AD106 chip built on the Ada Lovelace architecture, manufactured by TSMC on a 5 nm process. The die size is 188 mm² with 22,900 million transistors, producing a transistor density of 121.8 million per square millimeter. The N1X 48SM uses the GB20B chip on the Blackwell 2.0 architecture, also TSMC 5 nm, but with a larger die size of 382 mm². Its transistor count is unknown in the database, and no density figure is recorded.

The N1X 48SM carries more execution resources across every category. It has 6,144 shading units versus 4,608 on the RTX 4070 Mobile, a 33% increase. Texture mapping units stand at 384 versus 144, a 2.67x difference. Both have 48 ROPs. Ray tracing cores number 48 on the N1X 48SM against 36 on the RTX 4070 Mobile. Tensor cores are 192 versus 144, a 33% increase. These differences translate directly into higher theoretical throughput for the N1X 48SM.

Clock behavior diverges significantly. The RTX 4070 Mobile operates at a 1,395 MHz base and 1,695 MHz boost. The N1X 48SM has a much lower base clock of 741 MHz but a substantially higher boost clock of 2,346 MHz. This wide boost range suggests aggressive power management or a design tuned for burst workloads rather than sustained operation.

The memory subsystems are fundamentally different. The RTX 4070 Mobile uses 8 GB of GDDR6 on a 128-bit bus, with memory clocked at 2,000 MHz, or 16 Gbps effective, yielding 256.0 GB/s of bandwidth. The N1X 48SM uses 128 GB of LPDDR5X on a 256-bit bus, with memory at 1,067 MHz, or 8.5 Gbps effective, yielding 273.2 GB/s. The N1X 48SM delivers 16 times the capacity with only 6.7% more bandwidth.

API support also differs. The RTX 4070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 48SM records N/A for DirectX, OpenGL, and Vulkan, indicating no consumer graphics API support in the database. This reinforces the N1X 48SM's positioning as a compute-focused part rather than a gaming GPU.

The bus interface differs as well. The RTX 4070 Mobile uses PCIe 4.0 x8, while the N1X 48SM uses PCIe 5.0 x16, providing more host bandwidth for data transfer. Display outputs on the RTX 4070 Mobile are listed as portable device dependent, while the N1X 48SM has a single HDMI output.

FAQ

Q: Which GPU has higher FP32 compute throughput?

A: The N1X 48SM delivers 28.83 TFLOPS of FP32 compute, which is 84.5% higher than the RTX 4070 Mobile's 15.62 TFLOPS.

Q: What is the memory capacity difference between the two?

A: The N1X 48SM has 128 GB of LPDDR5X memory, which is 16 times the 8 GB of GDDR6 on the RTX 4070 Mobile.

Q: Do both GPUs support the same graphics APIs?

A: No. The RTX 4070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 48SM records N/A for all three APIs.

Q: How does the RTX 4070 Mobile compare to its nearest rivals?

A: The RTX 4070 Mobile is within 1.5% of four rivals: the AMD Radeon RX 6700 XT is exactly tied at 0% delta, the NVIDIA GeForce RTX 3090 is 0.5% ahead, the NVIDIA RTX PRO 4000 Blackwell is 1.1% behind, and the AMD Radeon Pro Vega 20 is 1.5% ahead.

Q: What is the pixel rate for each GPU?

A: The RTX 4070 Mobile has a pixel rate of 81.36 GPixel/s. The N1X 48SM has a pixel rate of 112.6 GPixel/s, which is 38.4% higher.

Q: Which GPU has a higher boost clock?

A: The N1X 48SM boosts to 2,346 MHz, compared to the RTX 4070 Mobile's 1,695 MHz boost clock. The N1X 48SM also has a lower base clock of 741 MHz versus 1,395 MHz on the RTX 4070 Mobile.

Where Each One Wins

The RTX 4070 Mobile wins in every category with recorded benchmark data. Its Geekbench OpenCL score of 109,197 and Vulkan score of 108,367 establish a strong baseline for compute workloads. The Passmark suite shows balanced performance across legacy APIs, with DirectX 9 at 223, DirectX 11 at 179, and DirectX 10 at 116. The DirectX 12 score of 85 is the lowest of the four, suggesting the architecture favors older API paths or that driver optimization for DX12 trails behind. The G3D score of 19,587 and GPU compute score of 8,399 round out a complete performance profile.

The RTX 4070 Mobile also wins on compatibility. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, making it suitable for gaming and general-purpose graphics workloads. Its 73rd percentile ranking across all GPUs places it above the median, and its average score of 27,435 puts it in direct competition with desktop-class parts like the RTX 3090 and RX 6700 XT.

The N1X 48SM wins on raw specifications. Its 28.83 TFLOPS of FP32 compute exceeds the RTX 4070 Mobile by 84.5%. Its 900.9 GTexel/s texture rate is 3.69 times the RTX 4070 Mobile's 244.1 GTexel/s. Its 112.6 GPixel/s pixel rate is 38.4% higher. Memory capacity of 128 GB dwarfs the 8 GB on the RTX 4070 Mobile. Tensor core count of 192 versus 144, and RT core count of 48 versus 36, give it more dedicated acceleration resources.

The N1X 48SM also wins on host connectivity. Its PCIe 5.0 x16 interface provides substantially more bandwidth to the host system than the RTX 4070 Mobile's PCIe 4.0 x8. For workloads that involve frequent data transfers between GPU memory and system memory, this could be a decisive factor. The 256-bit memory bus on the N1X 48SM, double the width of the RTX 4070 Mobile's 128-bit bus, also supports higher sustained throughput per clock.

In terms of production status, both are listed as Active. The RTX 4070 Mobile released on 2023-01-02, while the N1X 48SM has a release date of 2026-05-31. The N1X 48SM is a newer design by roughly three and a half years.

Specification Differences

The two GPUs differ across nearly every specification field in the database.

Process and Die: Both use TSMC 5 nm. The RTX 4070 Mobile has a die size of 188 mm² with 22,900 million transistors and a density of 121.8M/mm². The N1X 48SM has a die size of 382 mm², more than double, with unknown transistor count and density.

Clocks: The RTX 4070 Mobile runs at 1,395 MHz base and 1,695 MHz boost. Memory is clocked at 2,000 MHz, or 16 Gbps effective. The N1X 48SM runs at 741 MHz base and 2,346 MHz boost. Memory is clocked at 1,067 MHz, or 8.5 Gbps effective.

Memory: The RTX 4070 Mobile has 8 GB of GDDR6 on a 128-bit bus with 256.0 GB/s bandwidth. The N1X 48SM has 128 GB of LPDDR5X on a 256-bit bus with 273.2 GB/s bandwidth.

Compute Units: The RTX 4070 Mobile has 4,608 shading units, 144 TMUs, 48 ROPs, 36 RT cores, and 144 tensor cores. The N1X 48SM has 6,144 shading units, 384 TMUs, 48 ROPs, 48 RT cores, and 192 tensor cores.

Throughput: The RTX 4070 Mobile delivers 81.36 GPixel/s pixel rate, 244.1 GTexel/s texture rate, 15.62 TFLOPS FP32, and 15.62 TFLOPS FP16. The N1X 48SM delivers 112.6 GPixel/s, 900.9 GTexel/s, 28.83 TFLOPS FP32, and 28.83 TFLOPS FP16.

Power and Form Factor: The RTX 4070 Mobile has a TDP of 115 W. The N1X 48SM has an unknown TDP. Both are IGP slot width with no power connectors.

Bus Interface: The RTX 4070 Mobile uses PCIe 4.0 x8. The N1X 48SM uses PCIe 5.0 x16.

Display Outputs: The RTX 4070 Mobile is portable device dependent. The N1X 48SM has 1x HDMI.

API Support: The RTX 4070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 48SM records N/A for all three.

Release Date: The RTX 4070 Mobile launched 2023-01-02. The N1X 48SM launched 2026-05-31.