NVIDIA GeForce RTX 4080 Mobile vs NVIDIA N1X 48SM Comparison

FAQ

Q: How does the NVIDIA GeForce RTX 4080 Mobile compare to the NVIDIA N1X 48SM in terms of raw compute performance?

A: The RTX 4080 Mobile delivers 24.72 TFLOPS FP32 performance, while the N1X 48SM reaches 28.83 TFLOPS FP32. The N1X 48SM holds a 16.6% advantage in raw floating-point throughput, though the RTX 4080 Mobile has an 81st percentile ranking across all GPUs compared to the N1X 48SM's 50th percentile.

Q: What is the memory configuration difference between these two GPUs?

A: The RTX 4080 Mobile uses 12 GB of GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth. The N1X 48SM uses 128 GB of LPDDR5X on a 256-bit bus with 273.2 GB/s bandwidth. The N1X 48SM has over 10 times the memory capacity but the RTX 4080 Mobile has 58.1% higher memory bandwidth.

Q: Which GPU has a higher boost clock speed?

A: The N1X 48SM boosts to 2346 MHz, while the RTX 4080 Mobile boosts to 1665 MHz. The N1X 48SM's boost clock is 40.9% higher, although its base clock of 741 MHz is substantially lower than the RTX 4080 Mobile's 1290 MHz base.

Q: Are there any benchmark scores available for the N1X 48SM?

A: The database contains no benchmark entries for the N1X 48SM. Its average benchmark score is listed as 0, and it has no nearest rivals. The RTX 4080 Mobile has recorded scores across multiple tests including Geekbench OpenCL (159575), Geekbench Vulkan (145807), and Passmark G3D (24926).

Q: What is the transistor density difference between the two chips?

A: The RTX 4080 Mobile's AD104 chip has 35,800 million transistors on a 294 mm² die, yielding a density of 121.8M transistors per mm². The N1X 48SM's GB20B chip has a larger 382 mm² die, but its transistor count is listed as unknown, so density cannot be calculated.

Q: How do the shading unit counts compare?

A: The RTX 4080 Mobile has 7424 shading units, while the N1X 48SM has 6144 shading units. The RTX 4080 Mobile has 20.8% more shading units, but the N1X 48SM compensates with a higher boost clock and 384 texture mapping units versus 232 on the RTX 4080 Mobile.

Architecture Differences

The RTX 4080 Mobile is built on the Ada Lovelace architecture using the AD104 chip, while the N1X 48SM uses the Blackwell 2.0 architecture with the GB20B chip. Both are manufactured by TSMC on a 5 nm process node. The RTX 4080 Mobile is part of the GeForce 40 Mobile generation, whereas the N1X 48SM belongs to the Blackwell IGP (N1x) generation.

The die sizes differ significantly: the AD104 measures 294 mm², while the GB20B is larger at 382 mm². The RTX 4080 Mobile packs 35,800 million transistors into its smaller die, achieving a density of 121.8M transistors per mm². The N1X 48SM's transistor count is not recorded in the database, leaving its density unknown.

Ray tracing and tensor core configurations diverge as well. The RTX 4080 Mobile has 58 RT cores and 232 tensor cores. The N1X 48SM has 48 RT cores and 192 tensor cores. The RTX 4080 Mobile's higher RT and tensor core counts suggest a more robust configuration for ray-traced workloads and AI acceleration, but the N1X 48SM compensates with a higher boost clock.

Texture and pixel processing capabilities show a notable split. The N1X 48SM has 384 TMUs, delivering a texture rate of 900.9 GTexel/s, which is 133.2% higher than the RTX 4080 Mobile's 386.3 GTexel/s. However, the RTX 4080 Mobile has 80 ROPs versus the N1X 48SM's 48 ROPs, giving it a pixel rate of 133.2 GPixel/s compared to 112.6 GPixel/s on the N1X 48SM.

The API support also differs. The RTX 4080 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1X 48SM lists N/A for DirectX, OpenGL, and Vulkan, indicating a more limited or specialized software interface profile.

The Verdict

The recorded data shows two GPUs designed for different priorities. The RTX 4080 Mobile has a complete benchmark profile, an 81st percentile ranking, and a 38135 average benchmark score. The N1X 48SM has no benchmark entries, a 50th percentile ranking, and an average score of zero, making direct performance comparison impossible from measured results.

For users who need proven, tested performance with established driver and API support, the RTX 4080 Mobile is the data-backed choice. It offers 12 GB of GDDR6 memory with 432.0 GB/s bandwidth, a mature Ada Lovelace architecture, and support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. Its 81st percentile standing places it well above the N1X 48SM's 50th percentile in the database's ranking system.

The N1X 48SM presents a different profile. Its 128 GB LPDDR5X memory capacity is extraordinary, and its 28.83 TFLOPS FP32 output exceeds the RTX 4080 Mobile's 24.72 TFLOPS. The Blackwell 2.0 architecture and PCIe 5.0 x16 interface suggest a forward-looking design. However, the absence of any benchmark scores and the N/A API listings mean its real-world capabilities remain unverified in the database.

The choice depends on whether the user prioritizes verified, measurable performance or theoretical specifications. The RTX 4080 Mobile delivers the former; the N1X 48SM offers the latter. The N1X 48SM's 128 GB memory capacity, 256-bit bus, and higher boost clock point toward a compute-focused or specialized workload role, while the RTX 4080 Mobile's benchmark results indicate broader general-purpose graphics capability.

Specification Differences

The two GPUs differ across nearly every recorded specification field. The RTX 4080 Mobile uses the AD104 chip with Ada Lovelace architecture, while the N1X 48SM uses GB20B with Blackwell 2.0. Process nodes match at 5 nm from TSMC, but die sizes differ: 294 mm² versus 382 mm².

Clock speeds show a split between base and boost. The RTX 4080 Mobile runs at 1290 MHz base and 1665 MHz boost. The N1X 48SM runs at 741 MHz base and 2346 MHz boost. Memory clocks also differ: 2250 MHz (18 Gbps effective) for the RTX 4080 Mobile versus 1067 MHz (8.5 Gbps effective) for the N1X 48SM.

Memory configurations diverge sharply. The RTX 4080 Mobile has 12 GB GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth. The N1X 48SM has 128 GB LPDDR5X on a 256-bit bus with 273.2 GB/s bandwidth. The RTX 4080 Mobile's memory type is faster per pin, but the N1X 48SM offers far greater capacity.

Core counts differ across all categories. The RTX 4080 Mobile has 7424 shading units, 232 TMUs, 80 ROPs, 58 RT cores, and 232 tensor cores. The N1X 48SM has 6144 shading units, 384 TMUs, 48 ROPs, 48 RT cores, and 192 tensor cores.

Compute rates reflect these configurations. The RTX 4080 Mobile achieves 24.72 TFLOPS FP32 and FP16 (1:1), with a pixel rate of 133.2 GPixel/s and texture rate of 386.3 GTexel/s. The N1X 48SM achieves 28.83 TFLOPS FP32 and FP16 (1:1), with a pixel rate of 112.6 GPixel/s and texture rate of 900.9 GTexel/s.

Bus interfaces differ by generation: PCIe 4.0 x16 for the RTX 4080 Mobile versus PCIe 5.0 x16 for the N1X 48SM. Display outputs also differ: Portable Device Dependent for the RTX 4080 Mobile versus 1x HDMI for the N1X 48SM. The RTX 4080 Mobile's TDP is recorded at 110 W, while the N1X 48SM's TDP is unknown. Both use IGP slot width with no power connectors.

Release dates show a gap: the RTX 4080 Mobile launched on 2023-01-02, while the N1X 48SM is dated 2026-05-31. The RTX 4080 Mobile's predecessor is GeForce 30 Mobile and successor is GeForce 50 Mobile, while the N1X 48SM has no recorded predecessor or successor.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries for these two GPUs. The RTX 4080 Mobile has a full set of individual benchmark scores, while the N1X 48SM has no recorded benchmarks at all.

The RTX 4080 Mobile's strongest recorded results include a Geekbench OpenCL score of 159575 and a Geekbench Vulkan score of 145807. Its Passmark G3D score reaches 24926, and its Passmark GPU Compute score is 11191. These results contribute to its average benchmark score of 38135.

In the absence of N1X 48SM benchmark data, the nearest rivals to the RTX 4080 Mobile provide context. The NVIDIA GeForce MX570 scores 38299, which is 0.4% higher than the RTX 4080 Mobile. The NVIDIA GeForce RTX 5080 Mobile scores 38349, 0.6% higher. The NVIDIA GeForce RTX 4070 scores 37648, which is 1.3% lower. The NVIDIA Tesla P4 scores 37628, also 1.3% lower.

These deltas place the RTX 4080 Mobile in a tight competitive band. Its average score sits within 1.3% of four different rivals, indicating consistent mid-range positioning. The N1X 48SM's zero average score and empty rival list provide no comparable data points.

The absence of N1X 48SM benchmarks means every comparison must rely on specification-level analysis. The N1X 48SM's 28.83 TFLOPS FP32 exceeds the RTX 4080 Mobile's 24.72 TFLOPS by 16.6%. Its texture rate of 900.9 GTexel/s more than doubles the RTX 4080 Mobile's 386.3 GTexel/s. Its 128 GB memory capacity dwarfs the 12 GB on the RTX 4080 Mobile.

Conversely, the RTX 4080 Mobile's memory bandwidth of 432.0 GB/s is 58.1% higher than the N1X 48SM's 273.2 GB/s. Its pixel rate of 133.2 GPixel/s exceeds the N1X 48SM's 112.6 GPixel/s by 18.3%. Its 80 ROPs versus 48 ROPs gives it a 66.7% advantage in raster operation units.

Where Each One Wins

The RTX 4080 Mobile wins in memory bandwidth, pixel throughput, ROP count, shading unit count, RT core count, and tensor core count. Its 432.0 GB/s bandwidth versus 273.2 GB/s makes it better suited for bandwidth-intensive workloads. Its 133.2 GPixel/s pixel rate and 80 ROPs favor high-resolution rasterization. The 7424 shading units and 58 RT cores suggest stronger geometry and ray-tracing processing capability.

The RTX 4080 Mobile also wins on software compatibility. Its DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 support cover modern graphics APIs. The N1X 48SM lists N/A for all three, indicating a more limited software interface. The RTX 4080 Mobile's established benchmark results provide measurable evidence of performance, while the N1X 48SM offers none.

The N1X 48SM wins in raw FP32 compute, texture throughput, memory capacity, and boost clock. Its 28.83 TFLOPS versus 24.72 TFLOPS gives it a 16.6% compute advantage. Its 900.9 GTexel/s texture rate is more than double the RTX 4080 Mobile's 386.3 GTexel/s, suggesting superior texture-heavy workload performance. The 128 GB LPDDR5X memory capacity exceeds the RTX 4080 Mobile by more than 10 times, which could enable large dataset processing or model residency. Its 2346 MHz boost clock is 40.9% higher than the RTX 4080 Mobile's 1665 MHz.

The N1X 48SM also wins on interface generation with PCIe 5.0 x16 versus PCIe 4.0 x16, and on die size at 382 mm² versus 294 mm². Its 384 TMUs versus 232 TMUs reinforces the texture processing advantage.

The use-case split follows these strengths. The RTX 4080 Mobile suits gaming, rasterization-heavy rendering, and applications requiring broad API support and verified driver performance. The N1X 48SM suits compute-oriented tasks, texture-intensive workloads, and scenarios where memory capacity or raw FP32 throughput takes priority over established benchmark validation.