NVIDIA Rubin GPU vs Lisuan Tech LX ULTRA Comparison

Head-to-Head Benchmarks

The database contains no direct benchmark scores for either the NVIDIA Rubin GPU or the Lisuan Tech LX ULTRA. Both entries carry an average benchmark score of 0 and a percentile rank of 50 against all GPUs, meaning neither has recorded a measurable performance result in the database yet. Without recorded data, a numerical comparison of their compute capabilities must rely on the theoretical specifications each manufacturer has provided.

The NVIDIA Rubin GPU lists an FP32 throughput of 130.0 TFLOPS and an FP16 throughput of 260.0 TFLOPS (2:1). The Lisuan Tech LX ULTRA lists 24.58 TFLOPS for FP32 and 49.15 TFLOPS for FP16 (2:1). On paper, the Rubin GPU delivers roughly 5.3 times the FP32 throughput and approximately 5.3 times the FP16 throughput of the LX ULTRA. These figures come directly from the recorded specification sheets, not from executed workloads.

Texture and pixel processing rates also differ substantially. The Rubin GPU shows a texture rate of 2,031.2 GTexel/s and a pixel rate of 54.41 GPixel/s. The LX ULTRA shows 384.0 GTexel/s and 192.0 GPixel/s. The Rubin GPU has a 5.3x advantage in texture fill rate, while the LX ULTRA holds a 3.5x advantage in pixel fill rate. That pixel rate gap matters for rasterization-heavy tasks, though the Rubin GPU is a server-class module with no display outputs.

Memory bandwidth separates the two decisively. The Rubin GPU records 22.1 TB/s of bandwidth across a 16384-bit HBM4 interface, while the LX ULTRA records 432.0 GB/s across a 192-bit GDDR6 interface. That is a 51x difference in raw memory bandwidth, a figure that will dominate any memory-bound workload. The Rubin GPU also holds 288 GB of memory versus 24 GB on the LX ULTRA, a 12x capacity difference.

Neither card has any recorded head-to-head benchmark wins, so the database offers no empirical verdict on which device finishes workloads faster. The specification sheets indicate that the Rubin GPU targets a completely different performance class, but the absence of measured results means no confirmed win exists for either product.

Architecture Differences

The NVIDIA Rubin GPU uses the GR100 chip built on a 3 nm process at TSMC, with 336,000 million transistors on a 1456 mm² die. That yields a transistor density of 230.8M per mm². The Lisuan Tech LX ULTRA uses the 7G105 chip on a 6 nm process, also at TSMC, but the database lists transistor count, die size, and density as unknown. The Rubin GPU belongs to the Server Rubin (Rxx) generation, while the LX ULTRA belongs to the 7G100 generation.

The Rubin GPU packs 28,672 shading units, 896 TMUs, 24 ROPs, and 896 tensor cores. The LX ULTRA packs 6,144 shading units, 192 TMUs, and 96 ROPs, with no tensor core count listed. The Rubin GPU has a 4.7x shading unit advantage and a 4.7x TMU advantage, but the LX ULTRA has a 4x ROP advantage. The Rubin GPU's 24 ROPs are unusually low for a chip of its scale, which explains its lower pixel rate despite massively higher texture throughput.

Memory architecture differs fundamentally. The Rubin GPU uses HBM4 with 288 GB capacity, a 16384-bit bus, and 22.1 TB/s bandwidth. The LX ULTRA uses GDDR6 with 24 GB capacity, a 192-bit bus, and 432.0 GB/s bandwidth. The memory clock on the Rubin GPU is listed at 2695 MHz with 10.8 Gbps effective, while the LX ULTRA lists 2250 MHz with 18 Gbps effective. The LX ULTRA's memory runs at a higher effective data rate per pin, but the Rubin GPU's enormous bus width delivers far more total bandwidth.

The Rubin GPU is a SXM Module with a 2300 W TDP and a suggested PSU of 2700 W. The LX ULTRA is a Dual-slot card with a 225 W TDP and a suggested PSU of 550 W. The Rubin GPU uses PCIe 6.0 x16, while the LX ULTRA uses PCIe 4.0 x16. The Rubin GPU has no display outputs, while the LX ULTRA provides 4x DisplayPort 1.4a outputs.

API support also diverges. The LX ULTRA supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.3. The Rubin GPU lists N/A for DirectX, OpenGL, and Vulkan, consistent with its server-oriented design that does not target consumer graphics APIs. The LX ULTRA also records physical dimensions of 268 mm length, 112 mm height, and 40 mm width, while the Rubin GPU lists no dimensions.

Where Each One Wins

The NVIDIA Rubin GPU wins on raw compute throughput, memory capacity, memory bandwidth, and texture processing. Its FP32 and FP16 figures are both over five times higher than the LX ULTRA. Its 288 GB HBM4 pool and 22.1 TB/s bandwidth make it suitable for large model training, scientific simulation, or other workloads where data sets exceed what a 24 GB card can hold. The 896 tensor cores add AI-specific acceleration that the LX ULTRA does not list at all.

The Lisuan Tech LX ULTRA wins on pixel fill rate, producing 192.0 GPixel/s versus 54.41 GPixel/s on the Rubin GPU. It also wins on physical integration: a dual-slot card with 225 W TDP and a 550 W suggested PSU versus a 2300 W SXM module requiring 2700 W. The LX ULTRA provides display outputs, making it a usable graphics card for rendering or desktop workloads, while the Rubin GPU has no outputs at all. The LX ULTRA also supports standard graphics APIs, so it can run DirectX 12 Ultimate titles, whereas the Rubin GPU cannot.

The LX ULTRA's 96 ROPs versus 24 ROPs on the Rubin GPU gives it a clear advantage in final pixel output and rasterization-heavy scenes. The Rubin GPU's 24 ROPs create a bottleneck for any workload that ends in pixel generation, despite its dominant texture rate. The LX ULTRA also runs on PCIe 4.0, which is more broadly compatible with existing platforms than the Rubin GPU's PCIe 6.0 requirement.

For power-constrained environments, the LX ULTRA is the only viable option. The 225 W TDP fits in standard workstation or gaming builds, while the 2300 W TDP of the Rubin GPU demands specialized server infrastructure. The LX ULTRA's 24 GB memory is small by comparison, but it is enough for many rendering or inference tasks that do not require massive model residency.

FAQ

Q: Which GPU has higher FP32 compute?

A: The NVIDIA Rubin GPU lists 130.0 TFLOPS FP32, which is about 5.3 times the 24.58 TFLOPS listed for the Lisuan Tech LX ULTRA.

Q: How much memory does each card have?

A: The Rubin GPU has 288 GB of HBM4 memory, while the LX ULTRA has 24 GB of GDDR6 memory, a 12x capacity difference.

Q: Can the NVIDIA Rubin GPU output video to a display?

A: No, the Rubin GPU lists no display outputs, while the LX ULTRA provides 4x DisplayPort 1.4a outputs.

Q: What is the power draw difference?

A: The Rubin GPU has a 2300 W TDP with a 2700 W suggested PSU, while the LX ULTRA has a 225 W TDP with a 550 W suggested PSU.

Q: Does the LX ULTRA support modern graphics APIs?

A: Yes, it supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.3. The Rubin GPU lists N/A for all three APIs.

Q: Which card has higher pixel fill rate?

A: The LX ULTRA has 192.0 GPixel/s, which is 3.5 times higher than the Rubin GPU's 54.41 GPixel/s.

Specification Differences

| Specification | NVIDIA Rubin GPU | Lisuan Tech LX ULTRA |

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

| Chip | GR100 | 7G105 |

| Architecture | Rubin | TrueGPU |

| Generation | Server Rubin (Rxx) | 7G100 |

| Process Node | 3 nm | 6 nm |

| Foundry | TSMC | TSMC |

| Transistors | 336,000 million | unknown |

| Die Size | 1456 mm² | unknown |

| Transistor Density | 230.8M / mm² | null |

| Base Clock | 700 MHz | null |

| Boost Clock | 2267 MHz | null |

| Memory Clock | 2695 MHz 10.8 Gbps effective | 2250 MHz 18 Gbps effective |

| Memory Size | 288 GB | 24 GB |

| Memory Type | HBM4 | GDDR6 |

| Memory Bus Width | 16384 bit | 192 bit |

| Memory Bandwidth | 22.1 TB/s | 432.0 GB/s |

| Shading Units | 28672 | 6144 |

| TMUs | 896 | 192 |

| ROPs | 24 | 96 |

| Tensor Cores | 896 | null |

| Pixel Rate | 54.41 GPixel/s | 192.0 GPixel/s |

| Texture Rate | 2,031.2 GTexel/s | 384.0 GTexel/s |

| FP32 | 130.0 TFLOPS | 24.58 TFLOPS |

| FP16 | 260.0 TFLOPS (2:1) | 49.15 TFLOPS (2:1) |

| TDP | 2300 W | 225 W |

| Slot Width | SXM Module | Dual-slot |

| Power Connectors | null | 1x 16-pin |

| Suggested PSU | 2700 W | 550 W |

| Bus Interface | PCIe 6.0 x16 | PCIe 4.0 x16 |

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

| DirectX | N/A | 12 Ultimate (12_2) |

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.3 |

| Length | null | 268 mm 10.6 inches |

| Height | null | 112 mm 4.4 inches |

| Width | null | 40 mm 1.6 inches |

| Release Date | 2025-12-31 | 2026-03-16 |

The Verdict

The data shows two products with no overlap in purpose. The NVIDIA Rubin GPU is a server compute module with 2300 W TDP, 288 GB HBM4, 130.0 TFLOPS FP32, and no display outputs. The Lisuan Tech LX ULTRA is a dual-slot consumer or workstation card with 225 W TDP, 24 GB GDDR6, 24.58 TFLOPS FP32, and four DisplayPort outputs. The Rubin GPU's compute and memory specifications place it in a different performance tier entirely, but the LX ULTRA is the only one of the two that can render to a screen or run standard graphics APIs.

For workloads that need maximum FP32 or FP16 throughput, large memory residency, or extreme bandwidth, the Rubin GPU is the clear choice. Its 22.1 TB/s bandwidth and 288 GB capacity support data sets that the LX ULTRA cannot fit. For any workload that ends in pixel output, rasterization, or standard API compatibility, the LX ULTRA is the only functional option, given its 192.0 GPixel/s pixel rate and DirectX 12 Ultimate support.

The recorded data does not include any measured benchmark results, so the verdict rests on specifications. The Rubin GPU is designed for scale and density, while the LX ULTRA is designed for integration and display. Neither product can substitute for the other in its intended role. Choose the Rubin GPU for server-side compute and the LX ULTRA for graphics output or power-constrained systems.