RTX A400 vs H100 PCIe
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 406 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 16.62 |
| Architecture | Hopper (2022−2023) | Ampere (2020−2024) |
| GPU code name | GH100 | GA107 |
| Market segment | Workstation | Workstation |
| Release date | 22 March 2022 (2 years ago) | 16 April 2024 (less than a year ago) |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 7296 | 768 |
| Core clock speed | 1065 MHz | 727 MHz |
| Boost clock speed | 1650 MHz | 1762 MHz |
| Number of transistors | 80,000 million | 8,700 million |
| Manufacturing process technology | 4 nm | 8 nm |
| Power consumption (TDP) | 350 Watt | 50 Watt |
| Texture fill rate | 752.4 | 42.29 |
| Floating-point processing power | 24.08 TFLOPS | 2.706 TFLOPS |
| ROPs | 24 | 16 |
| TMUs | 456 | 24 |
| Tensor Cores | 456 | 24 |
| Ray Tracing Cores | no data | 6 |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Interface | PCIe 5.0 x16 | PCIe 4.0 x8 |
| Length | 267 mm | 163 mm |
| Width | 2-slot | 1-slot |
| Supplementary power connectors | 8-pin EPS | None |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | HBM2e | GDDR6 |
| Maximum RAM amount | 80 GB | 4 GB |
| Memory bus width | 5120 Bit | 64 Bit |
| Memory clock speed | 1000 MHz | 1500 MHz |
| Memory bandwidth | 1,280 GB/s | 96 GB/s |
Connectivity and outputs
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | No outputs | 4x mini-DisplayPort 1.4a |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | N/A | 12 Ultimate (12_2) |
| Shader Model | N/A | 6.7 |
| OpenGL | N/A | 4.6 |
| OpenCL | 3.0 | 3.0 |
| Vulkan | N/A | 1.3 |
| CUDA | 9.0 | 8.6 |
Synthetic benchmark performance
Non-gaming benchmark results comparison. The combined score is measured on a 0-100 point scale.
GeekBench 5 OpenCL
Geekbench 5 is a widespread graphics card benchmark combined from 11 different test scenarios. All these scenarios rely on direct usage of GPU's processing power, no 3D rendering is involved. This variation uses OpenCL API by Khronos Group.
Pros & cons summary
| Recency | 22 March 2022 | 16 April 2024 |
| Maximum RAM amount | 80 GB | 4 GB |
| Chip lithography | 4 nm | 8 nm |
| Power consumption (TDP) | 350 Watt | 50 Watt |
H100 PCIe has a 1900% higher maximum VRAM amount, and a 100% more advanced lithography process.
RTX A400, on the other hand, has an age advantage of 2 years, and 600% lower power consumption.
We couldn't decide between H100 PCIe and RTX A400. We've got no test results to judge.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
