NVIDIA N1 20SM vs Lisuan Tech LX ULTRA Comparison

Head-to-Head Benchmarks

The recorded data for the NVIDIA N1 20SM and the Lisuan Tech LX ULTRA presents a clear split in capabilities. The LX ULTRA dominates in raw compute throughput. Its FP32 performance of 24.58 TFLOPS is more than double the N1 20SM’s 12.01 TFLOPS, a 104.7% advantage. The gap widens further in FP16 workloads: the LX ULTRA reaches 49.15 TFLOPS with a 2:1 ratio, while the N1 20SM delivers 12.01 TFLOPS at a 1:1 ratio. This makes the LX ULTRA more than 4 times faster in half-precision compute.

Memory bandwidth also favors the LX ULTRA. It delivers 432.0 GB/s over a 192-bit GDDR6 bus, compared to the N1 20SM’s 273.2 GB/s over a 256-bit LPDDR5X bus. The LX ULTRA holds a 58.2% bandwidth advantage, which directly benefits texture-heavy and data-intensive operations. Its texture rate of 384.0 GTexel/s exceeds the N1 20SM’s 375.4 GTexel/s by a slim 2.3%, showing that the N1 20SM’s higher TMU count per shader helps close the gap in texturing despite lower raw throughput.

Pixel throughput is where the LX ULTRA pulls further ahead. It posts 192.0 GPixel/s versus the N1 20SM’s 56.30 GPixel/s, a 3.4 times difference. This stems from the LX ULTRA’s 96 ROPs against the N1 20SM’s 24 ROPs. In rasterization-heavy scenarios, the LX ULTRA has a decisive edge.

Clock behavior shows a different story. The N1 20SM has a base clock of 741 MHz and a boost clock of 2346 MHz, a 3.2 times boost range. The LX ULTRA has no listed base or boost clocks, so its operating frequency cannot be compared from the data. The N1 20SM’s memory runs at 1067 MHz with 8.5 Gbps effective, while the LX ULTRA’s memory runs at 2250 MHz with 18 Gbps effective. The LX ULTRA’s memory clock is 2.1 times higher, and its effective data rate is 2.1 times higher as well.

Shader resources favor the LX ULTRA in raw count. It has 6144 shading units, 192 TMUs, and 96 ROPs. The N1 20SM has 2560 shading units, 160 TMUs, and 24 ROPs. The LX ULTRA has 2.4 times more shaders and 4 times more ROPs. However, the N1 20SM includes 20 RT cores and 80 tensor cores, while the LX ULTRA has no listed RT or tensor core counts. This means ray tracing and tensor-accelerated workloads are only directly supported by the N1 20SM in the database.

The N1 20SM uses a 5 nm TSMC process and a 382 mm² die. The LX ULTRA uses a 6 nm TSMC process with an unknown die size. The N1 20SM’s smaller process node may contribute to its higher boost clock relative to its base, but the LX ULTRA’s thermal envelope is explicitly listed at 225 W TDP with a suggested 550 W PSU, whereas the N1 20SM has an unknown TDP and no power connectors, indicating an integrated graphics implementation.

The Verdict

The data indicates two distinct product categories. The NVIDIA N1 20SM is an integrated graphics processor (IGP) with a PCIe 5.0 x16 interface, 128 GB of LPDDR5X memory, and a single HDMI output. The Lisuan Tech LX ULTRA is a dual-slot discrete card with 24 GB of GDDR6, four DisplayPort 1.4a outputs, a 16-pin power connector, and a 268 mm length. Their form factors alone suggest different target systems.

For users requiring maximum FP32 or FP16 throughput, the LX ULTRA is the clear choice from the data. Its 24.58 TFLOPS FP32 and 49.15 TFLOPS FP16 represent the highest recorded compute figures in this comparison. The N1 20SM’s 12.01 TFLOPS in both FP32 and FP16 (1:1) places it at half the FP32 rate and one quarter the FP16 rate of the LX ULTRA.

For memory capacity, the N1 20SM offers 128 GB, which is 5.3 times the LX ULTRA’s 24 GB. This makes the N1 20SM suitable for large in-memory datasets, while the LX ULTRA’s higher bandwidth (432.0 GB/s vs 273.2 GB/s) favors streaming workloads. The LX ULTRA also supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.3, while the N1 20SM lists N/A for all three APIs, meaning no DX/GL/Vulkan support is recorded for the IGP.

The production status for both is Active. The LX ULTRA released on 2026-03-16, and the N1 20SM released on 2026-05-31, making the N1 20SM the newer product by about 2.5 months. Neither has a launch MSRP in the database.

Architecture Differences

The NVIDIA N1 20SM uses the GB20B chip based on Blackwell 2.0 architecture, part of the Blackwell IGP (N1x) generation. The Lisuan Tech LX ULTRA uses the 7G105 chip based on TrueGPU architecture, part of the 7G100 generation. These are fundamentally different designs.

The N1 20SM is fabricated on a 5 nm process at TSMC, with a die size of 382 mm². The LX ULTRA is fabricated on a 6 nm process at TSMC, with an unknown die size. The N1 20SM’s smaller process node gives it a manufacturing density advantage, though transistor counts are unknown for both.

Memory subsystems differ significantly. The N1 20SM uses 128 GB of LPDDR5X on a 256-bit bus, achieving 273.2 GB/s. The LX ULTRA uses 24 GB of GDDR6 on a 192-bit bus, achieving 432.0 GB/s. The LX ULTRA’s narrower bus is compensated by a much higher memory clock (2250 MHz vs 1067 MHz), resulting in 58.2% higher bandwidth despite 25% fewer bus bits.

The N1 20SM has 2560 shading units, 160 TMUs, and 24 ROPs. It also includes 20 RT cores and 80 tensor cores, which are absent from the LX ULTRA’s listed specifications. The LX ULTRA has 6144 shading units, 192 TMUs, and 96 ROPs, but no RT or tensor core entries. This indicates the N1 20SM is designed for ray tracing and AI acceleration, while the LX ULTRA focuses on conventional rasterization and compute.

The N1 20SM operates as an IGP with no power connectors, no slot width beyond IGP designation, and a single HDMI output. The LX ULTRA is a dual-slot card with a 1x 16-pin power connector, a 225 W TDP, a suggested 550 W PSU, and dimensions of 268 mm by 112 mm by 40 mm. The LX ULTRA uses PCIe 4.0 x16, while the N1 20SM uses PCIe 5.0 x16, giving the N1 20SM double the interface bandwidth potential.

API support is a major differentiator. The LX ULTRA supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.3. The N1 20SM lists N/A for DirectX, OpenGL, and Vulkan, meaning the database records no API support for the IGP. This limits the N1 20SM to workloads outside standard graphics APIs.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The Lisuan Tech LX ULTRA delivers 24.58 TFLOPS FP32, which is 2.05 times the NVIDIA N1 20SM’s 12.01 TFLOPS.

Q: How much memory does each GPU have?

A: The NVIDIA N1 20SM has 128 GB of LPDDR5X, while the Lisuan Tech LX ULTRA has 24 GB of GDDR6. The N1 20SM has 5.3 times more memory capacity.

Q: Which GPU supports ray tracing?

A: The NVIDIA N1 20SM includes 20 RT cores and 80 tensor cores. The Lisuan Tech LX ULTRA has no RT or tensor core counts listed in the database.

Q: What are the API differences between the two?

A: The Lisuan Tech LX ULTRA supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.3. The NVIDIA N1 20SM lists N/A for all three APIs.

Q: What is the power requirement for the Lisuan Tech LX ULTRA?

A: The LX ULTRA has a 225 W TDP, uses a 1x 16-pin power connector, and requires a suggested 550 W power supply. The NVIDIA N1 20SM has no power connectors and an unknown TDP.

Q: Which GPU has higher memory bandwidth?

A: The Lisuan Tech LX ULTRA achieves 432.0 GB/s, which is 58.2% higher than the NVIDIA N1 20SM’s 273.2 GB/s.

Q: What are the physical dimensions of the Lisuan Tech LX ULTRA?

A: The LX ULTRA measures 268 mm in length, 112 mm in height, and 40 mm in width. It is a dual-slot card. The N1 20SM is an IGP with no listed dimensions.

Where Each One Wins

The NVIDIA N1 20SM wins in memory capacity, offering 128 GB versus the LX ULTRA’s 24 GB. This gives it a 5.3 times advantage for workloads that require holding large datasets in memory, such as massive model inference or large-scale data processing. Its 5 nm process node and 382 mm² die also indicate a more advanced manufacturing process. The N1 20SM includes 20 RT cores and 80 tensor cores, providing hardware acceleration for ray tracing and tensor operations that the LX ULTRA lacks entirely. Its PCIe 5.0 x16 interface doubles the bus bandwidth of the LX ULTRA’s PCIe 4.0 x16, benefiting data transfers between CPU and GPU.

The Lisuan Tech LX ULTRA wins decisively in raw compute and rasterization. Its FP32 performance is 104.7% higher, and its FP16 performance is 309.2% higher (49.15 TFLOPS vs 12.01 TFLOPS). Pixel throughput is 3.4 times higher at 192.0 GPixel/s versus 56.30 GPixel/s, and texture throughput is slightly higher at 384.0 GTexel/s versus 375.4 GTexel/s. Memory bandwidth is 58.2% higher at 432.0 GB/s. The LX ULTRA has 2.4 times more shading units (6144 vs 2560) and 4 times more ROPs (96 vs 24). It also supports modern graphics APIs including DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.3, while the N1 20SM has no recorded API support.

The LX ULTRA’s 225 W TDP and dual-slot design with a 16-pin connector indicate a high-performance discrete solution, while the N1 20SM’s IGP form factor and no power connectors suggest an integrated solution for systems where power draw is secondary. The LX ULTRA’s 192-bit bus with 18 Gbps effective memory speed achieves higher bandwidth than the N1 20SM’s 256-bit bus with 8.5 Gbps effective, showing that the LX ULTRA prioritizes memory throughput over capacity.

In terms of release timing, the LX ULTRA launched on 2026-03-16, and the N1 20SM launched on 2026-05-31. Both are active in production. The N1 20SM’s 741 MHz base clock and 2346 MHz boost clock show a wide dynamic range, but the LX ULTRA has no listed clocks, preventing a direct frequency comparison.

The data shows no head-to-head benchmark scores, no nearest rivals, and no average benchmark scores for either product. The percentile rank for both is 50th versus all GPUs. Therefore, the wins are strictly derived from the architectural and specification data recorded.