NVIDIA N1 20SM vs NVIDIA RTX 4000 Mobile Ada Generation Comparison

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark entries for the NVIDIA N1 20SM versus the NVIDIA RTX 4000 Mobile Ada Generation. With zero wins recorded for either side, the comparative analysis must rely entirely on the architectural and specification data captured in the database rather than measured performance deltas.

The FP32 compute figures provide the clearest separation. The RTX 4000 Mobile Ada Generation delivers 24.72 TFLOPS of FP32 throughput, while the N1 20SM produces 12.01 TFLOPS. This places the Ada Lovelace part at roughly double the raw shader compute of the Blackwell IGP. The FP16 numbers mirror this exactly, with both GPUs operating at a 1:1 ratio between FP16 and FP32, so the same 24.72 TFLOPS versus 12.01 TFLOPS advantage applies to half-precision workloads.

The texture rate shows a narrower gap. The RTX 4000 Mobile achieves 386.3 GTexel/s, while the N1 20SM records 375.4 GTexel/s. This difference is modest, only about 3% in favor of the Ada part, despite the RTX 4000 Mobile carrying 232 TMUs against the N1's 160 TMUs. The reason lies in clock speeds: the N1 20SM boosts to 2346 MHz, substantially higher than the RTX 4000 Mobile's 1665 MHz boost, partially compensating for the fewer texture units.

Pixel throughput favors the RTX 4000 Mobile more decisively. The Ada GPU reaches 133.2 GPixel/s, versus 56.30 GPixel/s for the N1 20SM. That is a 2.37x advantage in fill rate, driven by the RTX 4000 Mobile's 80 ROPs compared to just 24 ROPs on the N1. The N1's higher boost clock cannot close this gap because the ROP count difference is too large.

Memory bandwidth presents a different story. The N1 20SM accesses 128 GB of LPDDR5X across a 256-bit bus, yielding 273.2 GB/s. The RTX 4000 Mobile has 12 GB of GDDR6 on a 192-bit bus, producing 432.0 GB/s. The Ada part leads bandwidth by 58%, but the N1's memory capacity advantage is massive: 128 GB versus 12 GB, a 10.7x difference. The N1 also uses a newer memory type, LPDDR5X, compared to GDDR6.

Ray tracing resources favor the RTX 4000 Mobile with 58 RT cores versus 20 RT cores on the N1. Tensor core counts show 232 on the Ada part versus 80 on the Blackwell IGP, a 2.9x difference in AI acceleration hardware.

Clock behavior differs notably. The N1 20SM has a base clock of 741 MHz and boosts to 2346 MHz, a 3.17x boost multiplier. The RTX 4000 Mobile starts at 1290 MHz base and boosts to 1665 MHz, only a 1.29x multiplier. The N1's aggressive boost curve suggests a design tuned for burst workloads, while the RTX 4000 Mobile runs closer to its sustained clock.

Transistor and die data reveal contrasting design philosophies. The RTX 4000 Mobile packs 35,800 million transistors into a 294 mm² die, yielding a density of 121.8M per mm². The N1 20SM uses a larger 382 mm² die with an unknown transistor count. Both are fabricated on TSMC's 5 nm process, but the N1's larger die with fewer shading units (2560 versus 7424) implies a very different allocation of silicon area, likely toward the 128 GB memory interface and integrated system functionality.

The Verdict

The recorded data indicates the RTX 4000 Mobile Ada Generation is the stronger pure GPU in nearly every compute and graphics throughput category. Its FP32 performance is 2.06x higher, its pixel rate is 2.37x higher, its bandwidth is 1.58x higher, and it carries 2.9x more tensor cores and 2.9x more RT cores. The texture rate advantage is small but still present at 386.3 versus 375.4 GTexel/s.

The N1 20SM wins decisively on memory capacity, offering 128 GB against 12 GB. It also boosts to a higher clock speed, 2346 MHz versus 1665 MHz, and uses a newer architecture generation, Blackwell 2.0 versus Ada Lovelace. The N1 has a wider memory bus at 256-bit versus 192-bit, but the lower memory clock on the N1 (1067 MHz, 8.5 Gbps effective) versus the RTX 4000 Mobile (2250 MHz, 18 Gbps effective) means the bandwidth advantage still goes to the Ada part.

Neither GPU has an average benchmark score recorded, and neither has any nearest rivals listed in the database. Both sit at the 50th percentile among all GPUs, which is the default neutral position when no measured data exists. The production status for both is Active, and both use IGP slot widths with no power connectors.

The database does not contain TDP data for the N1 20SM, while the RTX 4000 Mobile is rated at 110 W. Without a TDP figure for the N1, no efficiency comparison can be made from the recorded facts.

The RTX 4000 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1 20SM lists N/A for all three APIs, indicating the database does not classify it as a general-purpose graphics API device. This is a fundamental distinction: the Ada part exposes full graphics APIs, while the N1 does not.

Where Each One Wins

The RTX 4000 Mobile Ada Generation wins in scenarios that demand raw shader throughput, high fill rates, and substantial memory bandwidth. Its 24.72 TFLOPS FP32 and FP16 performance suits compute-heavy workloads such as rendering, simulation, and machine learning inference. The 133.2 GPixel/s pixel rate handles high-resolution rasterization, and the 432.0 GB/s bandwidth feeds large texture and geometry streams efficiently. The 58 RT cores and 232 tensor cores provide dedicated acceleration for ray-traced scenes and AI-enhanced rendering features. With DirectX 12 Ultimate and Vulkan 1.4 support, this GPU is equipped for modern graphics applications requiring full API compatibility.

The N1 20SM wins in capacity-driven scenarios. Its 128 GB of LPDDR5X memory dwarfs the RTX 4000 Mobile's 12 GB, making it suitable for workloads that need to hold very large datasets in local memory, such as large language model inference, massive in-memory databases, or multi-application virtualization. The 256-bit bus, while paired with modest 273.2 GB/s bandwidth, still provides a wide path for the LPDDR5X memory. The higher boost clock of 2346 MHz allows burst throughput that exceeds what the base clock of 741 MHz suggests, and the 20 RT cores and 80 tensor cores provide some accelerated compute capability even if far below the Ada part's counts.

The N1's 5 nm process node and Blackwell 2.0 architecture indicate a newer design generation. Its 382 mm² die is larger than the RTX 4000 Mobile's 294 mm², and its PCIe 5.0 x16 interface is one generation ahead of the RTX 4000 Mobile's PCIe 4.0 x16. The N1 also has a single HDMI display output, while the RTX 4000 Mobile's display outputs are described as portable device dependent, suggesting flexible integration rather than a fixed connector set.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The RTX 4000 Mobile Ada Generation delivers 24.72 TFLOPS FP32, which is 2.06 times the N1 20SM's 12.01 TFLOPS.

Q: How do the memory capacities compare?

A: The N1 20SM has 128 GB of LPDDR5X memory, while the RTX 4000 Mobile has 12 GB of GDDR6. The N1 offers 10.7 times more memory capacity.

Q: Which GPU has higher memory bandwidth?

A: The RTX 4000 Mobile leads with 432.0 GB/s, which is 1.58 times the N1 20SM's 273.2 GB/s.

Q: What API support does each GPU have?

A: The RTX 4000 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The N1 20SM lists N/A for DirectX, OpenGL, and Vulkan in the database.

Q: What are the boost clock speeds?

A: The N1 20SM boosts to 2346 MHz, while the RTX 4000 Mobile boosts to 1665 MHz. The N1's boost clock is 1.41 times higher.

Q: Which GPU has more ray tracing and tensor cores?

A: The RTX 4000 Mobile has 58 RT cores and 232 tensor cores. The N1 20SM has 20 RT cores and 80 tensor cores, making the Ada part 2.9 times higher in both categories.

Architecture Differences

The N1 20SM uses the GB20B chip based on Blackwell 2.0 architecture, classified in the database as part of the Blackwell IGP (N1x) generation. The RTX 4000 Mobile uses the AD104 chip based on Ada Lovelace architecture, belonging to the GeForce 40-series and the Ada-MW generation. Both are manufactured by NVIDIA on TSMC's 5 nm process, but the architectural generations differ by roughly three years in release timing: the RTX 4000 Mobile was released on 2023-03-20, while the N1 20SM carries a release date of 2026-05-31.

The N1's die measures 382 mm² with an unknown transistor count. The RTX 4000 Mobile's die is smaller at 294 mm² but contains 35,800 million transistors, resulting in a transistor density of 121.8M per mm². The N1's larger die area with significantly fewer shading units (2560 versus 7424) suggests a different functional allocation, likely including the integrated memory controller for 128 GB LPDDR5X and other IGP-level system components.

Shader configuration differs substantially. The N1 has 2560 shading units, 160 TMUs, and 24 ROPs. The RTX 4000 Mobile has 7424 shading units, 232 TMUs, and 80 ROPs. The RTX 4000 Mobile also carries 58 RT cores and 232 tensor cores, compared to 20 RT cores and 80 tensor cores on the N1.

The N1 uses PCIe 5.0 x16 for its bus interface, while the RTX 4000 Mobile uses PCIe 4.0 x16. The N1 has a single HDMI display output, whereas the RTX 4000 Mobile's display outputs are listed as portable device dependent. Both use IGP slot widths and have no power connectors. The RTX 4000 Mobile is rated at 110 W TDP; the N1's TDP is unknown in the database.

Specification Differences

The following fields differ between the NVIDIA N1 20SM and the NVIDIA RTX 4000 Mobile Ada Generation:

• Chip: GB20B versus AD104
• Architecture: Blackwell 2.0 versus Ada Lovelace
• Generation: Blackwell IGP (N1x) versus Ada-MW
• Transistors: unknown versus 35,800 million
• Die Size: 382 mm² versus 294 mm²
• Transistor Density: null versus 121.8M / mm²
• Base Clock: 741 MHz versus 1290 MHz
• Boost Clock: 2346 MHz versus 1665 MHz
• Memory Clock: 1067 MHz (8.5 Gbps effective) versus 2250 MHz (18 Gbps effective)
• Memory Size: 128 GB versus 12 GB
• Memory Type: LPDDR5X versus GDDR6
• Memory Bus Width: 256 bit versus 192 bit
• Memory Bandwidth: 273.2 GB/s versus 432.0 GB/s
• Shading Units: 2560 versus 7424
• TMUs: 160 versus 232
• ROPs: 24 versus 80
• RT Cores: 20 versus 58
• Tensor Cores: 80 versus 232
• Pixel Rate: 56.30 GPixel/s versus 133.2 GPixel/s
• Texture Rate: 375.4 GTexel/s versus 386.3 GTexel/s
• FP32: 12.01 TFLOPS versus 24.72 TFLOPS
• FP16: 12.01 TFLOPS (1:1) versus 24.72 TFLOPS (1:1)
• TDP: unknown versus 110 W
• Bus Interface: PCIe 5.0 x16 versus PCIe 4.0 x16
• Display Outputs: 1x HDMI versus Portable Device Dependent
• DirectX: N/A versus 12 Ultimate (12_2)
• OpenGL: N/A versus 4.6
• Vulkan: N/A versus 1.4
• Release Date: 2026-05-31 versus 2023-03-20
• Predecessor: null versus Ampere-MW
• Successor: null versus Blackwell-MW

Fields that are identical include manufacturer (NVIDIA), process node (5 nm), foundry (TSMC), slot width (IGP), power connectors (None), production status (Active), and the absence of launch MSRP data.