RTX A400 vs Tesla K20X
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 423 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 14.94 |
| Architecture | Kepler (2012−2018) | Ampere (2020−2024) |
| GPU code name | GK110 | GA107 |
| Market segment | Workstation | Workstation |
| Release date | 12 November 2012 (11 years ago) | 16 April 2024 (less than a year ago) |
| Launch price (MSRP) | $7,699 | no data |
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 | 2688 | 768 |
| Core clock speed | 732 MHz | 727 MHz |
| Boost clock speed | no data | 1762 MHz |
| Number of transistors | 7,080 million | 8,700 million |
| Manufacturing process technology | 28 nm | 8 nm |
| Power consumption (TDP) | 235 Watt | 50 Watt |
| Texture fill rate | 164.0 | 42.29 |
| Floating-point processing power | 3.935 TFLOPS | 2.706 TFLOPS |
| ROPs | 48 | 16 |
| TMUs | 224 | 24 |
| Tensor Cores | no data | 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 3.0 x16 | PCIe 4.0 x8 |
| Length | 267 mm | 163 mm |
| Width | 2-slot | 1-slot |
| Supplementary power connectors | 1x 6-pin + 1x 8-pin | 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 | GDDR5 | GDDR6 |
| Maximum RAM amount | 6 GB | 4 GB |
| Memory bus width | 384 Bit | 64 Bit |
| Memory clock speed | 1300 MHz | 1500 MHz |
| Memory bandwidth | 249.6 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 | 12 (11_0) | 12 Ultimate (12_2) |
| Shader Model | 5.1 | 6.7 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | 1.1.126 | 1.3 |
| CUDA | 3.5 | 8.6 |
Pros & cons summary
| Recency | 12 November 2012 | 16 April 2024 |
| Maximum RAM amount | 6 GB | 4 GB |
| Chip lithography | 28 nm | 8 nm |
| Power consumption (TDP) | 235 Watt | 50 Watt |
Tesla K20X has a 50% higher maximum VRAM amount.
RTX A400, on the other hand, has an age advantage of 11 years, a 250% more advanced lithography process, and 370% lower power consumption.
We couldn't decide between Tesla K20X 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.
