NVIDIA H20 NVL16 vs Lisuan Tech LX ULTRA Comparison

FAQ

Q: What are the core specifications of the NVIDIA H20 NVL16?

A: The H20 NVL16 is built on TSMC's 5 nm process with 80,000 million transistors on an 814 mm² die. It features 9,984 shading units, 312 TMUs, 24 ROPs, and 312 tensor cores. The memory subsystem consists of 96 GB of HBM3 on a 6144-bit bus, delivering 4.03 TB/s of bandwidth.

Q: What are the core specifications of the Lisuan Tech LX ULTRA?

A: The LX ULTRA uses TSMC's 6 nm process with 6,144 shading units, 192 TMUs, and 96 ROPs. It has 24 GB of GDDR6 memory on a 192-bit bus, providing 432.0 GB/s of bandwidth. The card operates at a 225 W TDP and uses a dual-slot design with a 1x 16-pin power connector.

Q: How do the two compare in terms of compute performance?

A: The H20 NVL16 delivers 39.54 TFLOPS of FP32 and 79.07 TFLOPS of FP16 (2:1), while the LX ULTRA provides 24.58 TFLOPS of FP32 and 49.15 TFLOPS of FP16 (2:1). The H20 NVL16 leads in both metrics, with approximately 61% higher FP32 and 61% higher FP16 throughput.

Q: What are the memory bandwidth differences between the two?

A: The H20 NVL16 has a substantial advantage, with 4.03 TB/s of bandwidth from 96 GB of HBM3 on a 6144-bit interface. The LX ULTRA offers 432.0 GB/s from 24 GB of GDDR6 on a 192-bit bus. The H20 NVL16 provides roughly 9.3 times the memory bandwidth.

Q: What form factor and connectivity options does each card use?

A: The H20 NVL16 is an SXM module with no display outputs and a PCIe 5.0 x16 bus interface. The LX ULTRA is a dual-slot card measuring 268 mm in length, 112 mm in height, and 40 mm in width, with four DisplayPort 1.4a outputs and a PCIe 4.0 x16 interface.

Q: What API support does each card provide?

A: The LX ULTRA supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.3, making it suitable for graphics workloads. The H20 NVL16 has no API support listed, indicating it is designed for compute-only applications.

The Verdict

The database places both cards at the 50th percentile among all GPUs, with no benchmark scores recorded for either. The recorded specifications, however, reveal sharply different design goals.

The NVIDIA H20 NVL16 targets compute-heavy environments that demand massive memory capacity and extreme bandwidth. Its 96 GB of HBM3 and 4.03 TB/s bandwidth, combined with 39.54 TFLOPS of FP32 and 79.07 TFLOPS of FP16, position it as a server accelerator for large-scale data processing, AI inference, and high-throughput workloads. The SXM form factor, absence of display outputs, and lack of graphics API support confirm this orientation.

The Lisuan Tech LX ULTRA is built for conventional graphics and general-purpose compute. Its 24 GB of GDDR6, 192.0 GPixel/s pixel rate, and support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.3 make it a viable option for rendering, visualization, and workstation tasks. The dual-slot design with four DisplayPort outputs and a 225 W TDP means it can be installed in standard desktop systems.

Strictly from the data, the choice depends on the workload class. The H20 NVL16 is the appropriate selection for server racks and compute clusters where memory capacity and bandwidth dominate. The LX ULTRA is the suitable option for graphics workstations and systems requiring display output and standard graphics APIs.

Head-to-Head Benchmarks

No benchmark scores are recorded in the database for either card, so direct performance comparisons rely entirely on the specification sheets.

The most decisive separation appears in memory bandwidth. The H20 NVL16 delivers 4.03 TB/s, while the LX ULTRA provides 432.0 GB/s. This is not a marginal difference; the H20 NVL16 offers roughly nine times the bandwidth. For workloads that stream large datasets, such as training neural networks or processing high-resolution volumetric data, this advantage is decisive.

Shader throughput also favors the H20 NVL16. Its 9,984 shading units and 312 TMUs produce a texture rate of 617.8 GTexel/s, compared with 384.0 GTexel/s from the LX ULTRA's 6,144 shading units and 192 TMUs. The FP32 figures follow the same pattern: 39.54 TFLOPS versus 24.58 TFLOPS.

The LX ULTRA wins in pixel throughput. Its 96 ROPs generate 192.0 GPixel/s, while the H20 NVL16's 24 ROPs produce 47.52 GPixel/s. The LX ULTRA's pixel rate is roughly four times higher than the H20 NVL16's, which matters for rasterization-heavy rendering tasks.

Clock speeds show a similar split. The H20 NVL16 runs at 1830 MHz base and 1980 MHz boost, with memory at 1313 MHz (5.3 Gbps effective). The LX ULTRA lists no base or boost clock, but its memory operates at 2250 MHz (18 Gbps effective). The H20 NVL16's higher core clocks and the LX ULTRA's faster memory clock reflect their different memory technologies and design priorities.

The LX ULTRA also leads in ROP count by a wide margin, 96 versus 24, and in pixel fill rate, 192.0 GPixel/s versus 47.52 GPixel/s. The H20 NVL16 counters with more TMUs, 312 versus 192, and a higher texture rate, 617.8 GTexel/s versus 384.0 GTexel/s.

Neither card recorded wins in the head-to-head benchmark section, so the database does not assign a victory to either product. The specification comparison, however, shows each card dominating in different metric categories.

Specification Differences

The two cards diverge on nearly every measurable specification.

| Specification | NVIDIA H20 NVL16 | Lisuan Tech LX ULTRA |

|---|---|---|

| Process node | 5 nm | 6 nm |

| Transistors | 80,000 million | Unknown |

| Die size | 814 mm² | Unknown |

| Memory size | 96 GB | 24 GB |

| Memory type | HBM3 | GDDR6 |

| Memory bus | 6144 bit | 192 bit |

| Memory bandwidth | 4.03 TB/s | 432.0 GB/s |

| Memory clock | 1313 MHz, 5.3 Gbps effective | 2250 MHz, 18 Gbps effective |

| Shading units | 9,984 | 6,144 |

| TMUs | 312 | 192 |

| ROPs | 24 | 96 |

| Tensor cores | 312 | None listed |

| Pixel rate | 47.52 GPixel/s | 192.0 GPixel/s |

| Texture rate | 617.8 GTexel/s | 384.0 GTexel/s |

| FP32 | 39.54 TFLOPS | 24.58 TFLOPS |

| FP16 | 79.07 TFLOPS (2:1) | 49.15 TFLOPS (2:1) |

| TDP | 400 W | 225 W |

| Slot width | SXM Module | Dual-slot |

| Power connectors | None listed | 1x 16-pin |

| Suggested PSU | 800 W | 550 W |

| Bus interface | PCIe 5.0 x16 | PCIe 4.0 x16 |

| Display outputs | No outputs | 4x DisplayPort 1.4a |

| API support | None (DirectX N/A, OpenGL N/A, Vulkan N/A) | DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.3 |

| Dimensions | Not listed | 268 mm x 112 mm x 40 mm |

The H20 NVL16 uses a newer 5 nm process versus 6 nm, carries 80,000 million transistors on an 814 mm² die, and requires a 400 W TDP with an 800 W suggested PSU. The LX ULTRA draws 225 W with a 550 W suggested PSU, making it far less demanding on system power delivery.

Architecture Differences

The architectural split between the two is fundamental. The H20 NVL16 is built on NVIDIA's Hopper architecture with the GH100 chip, part of the Server Hopper (Hxx) generation. The LX ULTRA uses the 7G105 chip with a TrueGPU architecture from the 7G100 generation.

The H20 NVL16 integrates 312 tensor cores, a feature absent from the LX ULTRA's specification sheet. Tensor cores accelerate matrix operations common in AI and deep learning workloads, giving the H20 NVL16 a hardware path for such tasks that the LX ULTRA does not list.

Memory architecture differs completely. The H20 NVL16 uses HBM3 on a 6144-bit bus, achieving 4.03 TB/s. The LX ULTRA uses GDDR6 on a 192-bit bus, achieving 432.0 GB/s. The HBM3 stack is designed for bandwidth density in compute accelerators, while GDDR6 serves as a more conventional graphics memory solution.

The H20 NVL16's compute-oriented design extends to its lack of display outputs and absence of graphics API support. The LX ULTRA, by contrast, supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.3, and provides four DisplayPort 1.4a outputs for direct display connection.

The H20 NVL16 is an SXM module, a board form factor intended for server chassis with specialized cooling and power delivery. The LX ULTRA is a dual-slot expansion card with a 16-pin power connector, designed for standard PCIe slots in desktop or workstation systems.

Where Each One Wins

The H20 NVL16 wins in every metric related to raw compute throughput and memory capacity. Its FP32 of 39.54 TFLOPS exceeds the LX ULTRA's 24.58 TFLOPS by roughly 61%. FP16 follows the same pattern at 79.07 TFLOPS versus 49.15 TFLOPS. Texture rate favors the H20 NVL16 at 617.8 GTexel/s versus 384.0 GTexel/s, and its 312 TMUs outnumber the LX ULTRA's 192.

Memory-bound workloads clearly favor the H20 NVL16. The 96 GB capacity and 4.03 TB/s bandwidth dwarf the LX ULTRA's 24 GB and 432.0 GB/s. Applications that hold large models or datasets in memory, such as large-scale inference or scientific simulation, will benefit from the H20 NVL16's capacity and bandwidth headroom.

The LX ULTRA wins in pixel processing and graphics delivery. Its 192.0 GPixel/s pixel rate is roughly four times the H20 NVL16's 47.52 GPixel/s, driven by 96 ROPs versus 24. For rasterization, frame buffer operations, and display-oriented workloads, the LX ULTRA is the stronger performer.

The LX ULTRA also wins on power efficiency per the recorded TDP. It draws 225 W versus 400 W, meaning it delivers its 24.58 TFLOPS at a lower power envelope. The suggested PSU of 550 W versus 800 W further reduces system power requirements.

Connectivity favors the LX ULTRA for interactive use. Four DisplayPort 1.4a outputs allow multi-monitor setups, while the H20 NVL16 has no display outputs at all. The LX ULTRA's PCIe 4.0 x16 interface is older than the H20 NVL16's PCIe 5.0 x16, but for graphics workloads the difference is secondary to the API support and output capabilities.

The H20 NVL16 wins for server deployment. Its SXM form factor, PCIe 5.0 interface, tensor cores, and massive memory bandwidth align with compute-intensive environments. The LX ULTRA wins for workstation graphics, offering standard APIs, display outputs, and a conventional card form factor.

The recorded data shows two products with minimal overlap. The H20 NVL16 is a high-bandwidth compute accelerator with no graphics capability. The LX ULTRA is a graphics-capable card with modest compute throughput. Each dominates its respective domain according to the specification sheet.