NVIDIA B200 SXM6 vs NVIDIA RTX A400 Comparison

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between the NVIDIA B200 SXM6 and the NVIDIA RTX A400. This is unsurprising given their radically different positioning. The B200 SXM6 is a server accelerator with no recorded benchmark scores and an average benchmark score of 0, placing it in the 50th percentile of all GPUs. The RTX A400, a workstation card, has a substantial set of recorded benchmarks with an average score of 6078, placing it in the 35th percentile.

The RTX A400's recorded data shows a clear profile across different test types. In Geekbench tests, it scores 22844 in OpenCL and 22237 in Vulkan. These are its strongest recorded results. Passmark tests tell a different story. The DirectX 9 score of 87 is the highest among its DirectX results, followed by DirectX 10 at 32, DirectX 11 at 37, and DirectX 12 at 27. The Passmark G2D score is 899, the G3D score is 5983, and the GPU compute score is 2557.

Comparing the RTX A400 to its nearest rivals in the database, the data shows a tightly clustered group. The NVIDIA GeForce MX230 has an average score of 6077, effectively identical to the A400's 6078, with a delta of 0 percent. The NVIDIA Quadro P2000 scores 6049, which is 0.5 percent behind the A400. The Intel Iris Pro Graphics 6200 scores 6117, putting it 0.6 percent ahead of the A400. The AMD Radeon 760M scores 6019, which is 1 percent behind.

The B200 SXM6 has no recorded benchmark scores, so no direct performance comparison is possible from the data. The absence of head-to-head benchmarks and the zero score for the B200 SXM6 means the database cannot quantify a performance gap. The RTX A400's scores, while modest in absolute terms, at least provide a reference point for its position among workstation and entry-level GPUs.

FAQ

Q: Which GPU has a higher FP32 compute throughput?

A: The NVIDIA B200 SXM6 delivers 69.34 TFLOPS of FP32 performance. The NVIDIA RTX A400 delivers 2.706 TFLOPS. The B200 SXM6 is the clear leader in raw FP32 throughput.

Q: What are the memory specifications of each GPU?

A: The B200 SXM6 uses 180 GB of HBM3e memory on a 8192-bit bus, providing 8.19 TB/s of bandwidth. The RTX A400 uses 4 GB of GDDR6 memory on a 64-bit bus, providing 96.00 GB/s of bandwidth.

Q: How do the process nodes differ?

A: The B200 SXM6 is built on a 5 nm process at TSMC. The RTX A400 is built on an 8 nm process at Samsung.

Q: Which GPU has tensor cores?

A: Both GPUs have tensor cores. The B200 SXM6 has 592 tensor cores. The RTX A400 has 24 tensor cores.

Q: Does the RTX A400 support ray tracing?

A: Yes, the RTX A400 has 6 ray tracing cores. The B200 SXM6 has no recorded ray tracing core count in the database.

Q: What is the release date of each GPU?

A: The B200 SXM6 was released on 2024-10-31. The RTX A400 was released on 2024-04-15.

Architecture Differences

The two GPUs come from entirely different architectural generations and design philosophies. The B200 SXM6 uses the GB100 chip based on the Blackwell architecture, part of the Server Blackwell (Bxx) generation. The RTX A400 uses the GA107 chip based on the Ampere architecture, part of the Workstation Ampere (Ax000) generation.

Manufacturing processes diverge sharply. The B200 SXM6 is fabricated by TSMC on a 5 nm process. The RTX A400 is fabricated by Samsung on an 8 nm process. The transistor counts reflect the scale difference. The B200 SXM6 contains 208,000 million transistors on a die size of 1628 mm², giving a transistor density of 127.8M per mm². The RTX A400 contains 8,700 million transistors on a 200 mm² die, giving a transistor density of 43.5M per mm².

Core configurations are vastly different. The B200 SXM6 has 18944 shading units, 592 texture mapping units, and 24 raster output pipelines. The RTX A400 has 768 shading units, 24 texture mapping units, and 16 raster output pipelines. The B200 SXM6 has 592 tensor cores, while the RTX A400 has 24 tensor cores. The RTX A400 additionally has 6 ray tracing cores; the B200 SXM6 has no recorded ray tracing core count.

Memory architectures are fundamentally different. The B200 SXM6 uses HBM3e memory with 180 GB capacity, an 8192-bit bus width, and 8.19 TB/s bandwidth. The RTX A400 uses GDDR6 memory with 4 GB capacity, a 64-bit bus width, and 96.00 GB/s bandwidth. These are not just capacity differences but entirely different memory technologies suited to different workloads.

Clock behavior also differs. The B200 SXM6 has a base clock of 120 MHz and a boost clock of 1830 MHz. Its memory runs at 2000 MHz with 8 Gbps effective speed. The RTX A400 has a base clock of 1417 MHz and a boost clock of 1762 MHz. Its memory runs at 1500 MHz with 12 Gbps effective speed.

API support separates the two further. The B200 SXM6 has no recorded API support for DirectX, OpenGL, or Vulkan. The RTX A400 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The B200 SXM6 is a server module with PCIe 6.0 x16 interface, no display outputs, and a slot width of SXM Module. The RTX A400 is a single-slot workstation card with PCIe 4.0 x8 interface and 4x mini-DisplayPort 1.4a outputs. The B200 SXM6 has no power connectors listed, while the RTX A400 has no power connectors at all. The suggested PSU for the B200 SXM6 is 1400 W, and for the RTX A400 it is 250 W.

Specification Differences

The table below highlights the key specification differences between the two GPUs as recorded in the database.

| Specification | NVIDIA B200 SXM6 | NVIDIA RTX A400 |

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

| Architecture | Blackwell | Ampere |

| Process Node | 5 nm | 8 nm |

| Foundry | TSMC | Samsung |

| Transistors | 208,000 million | 8,700 million |

| Die Size | 1628 mm² | 200 mm² |

| Base Clock | 120 MHz | 1417 MHz |

| Boost Clock | 1830 MHz | 1762 MHz |

| Memory Size | 180 GB | 4 GB |

| Memory Type | HBM3e | GDDR6 |

| Memory Bus | 8192 bit | 64 bit |

| Memory Bandwidth | 8.19 TB/s | 96.00 GB/s |

| Shading Units | 18944 | 768 |

| TMUs | 592 | 24 |

| ROPs | 24 | 16 |

| Tensor Cores | 592 | 24 |

| RT Cores | Not recorded | 6 |

| FP32 | 69.34 TFLOPS | 2.706 TFLOPS |

| FP16 | 69.34 TFLOPS (1:1) | 2.706 TFLOPS (1:1) |

| TDP | 1000 W | 50 W |

| Slot Width | SXM Module | Single-slot |

| Suggested PSU | 1400 W | 250 W |

| Bus Interface | PCIe 6.0 x16 | PCIe 4.0 x8 |

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

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

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Release Date | 2024-10-31 | 2024-04-15 |

The Verdict

The database presents two GPUs with no overlapping performance data. The B200 SXM6 has no recorded benchmarks, no average score, and no nearest rivals. Its percentile ranking of 50 among all GPUs is based on an average benchmark score of 0, which reflects the absence of measurements rather than actual performance. The RTX A400 has a full set of recorded benchmarks, an average score of 6078, and a 35th percentile ranking, placing it near the NVIDIA GeForce MX230, NVIDIA Quadro P2000, Intel Iris Pro Graphics 6200, and AMD Radeon 760M.

The B200 SXM6 is designed for server workloads. Its 180 GB HBM3e memory, 8.19 TB/s bandwidth, 69.34 TFLOPS FP32 and FP16 compute, and 592 tensor cores indicate a focus on massive parallel computation. Its 1000 W TDP and 1400 W suggested PSU confirm this is a high-power, high-throughput accelerator. It has no display outputs and no API support, making it unsuitable for graphics output or consumer workloads.

The RTX A400 is a workstation card with display outputs, API support for DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and a 50 W TDP. Its 4 GB GDDR6 memory and 2.706 TFLOPS FP32 compute are modest figures. The recorded benchmarks show it performs near the level of the NVIDIA GeForce MX230 and NVIDIA Quadro P2000, with a delta of 0 percent and 0.5 percent respectively. It sits slightly behind the Intel Iris Pro Graphics 6200 by 0.6 percent and slightly ahead of the AMD Radeon 760M by 1 percent.

For users selecting between these two, the choice is dictated by workload. The B200 SXM6 is the only option for server-scale compute requiring large memory capacity and extreme bandwidth, as no benchmark data exists to suggest otherwise. The RTX A400 is the only option for a workstation requiring display output, API compatibility, and low power consumption. The data provides no basis for comparing them on performance, as the B200 SXM6 has no recorded scores. The RTX A400's benchmarks are the only quantitative performance data available in this comparison.