Tesla K40st vs GeForce 840A
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 878 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 6.15 | no data |
| Architecture | Maxwell (2014−2017) | Kepler (2012−2018) |
| GPU code name | GM108 | GK110B |
| Market segment | Laptop | Workstation |
| Release date | 17 March 2014 (12 years ago) | 22 November 2013 (12 years ago) |
| Launch price (MSRP) | no data | $7,699 |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Real power consumption of some graphics cards can well exceed their nominal TDP, especially if overclocked.
| Pipelines / CUDA cores | 384 | 2880 |
| Core clock speed | 1029 MHz | 575 MHz |
| Boost clock speed | 1124 MHz | no data |
| Number of transistors | no data | 7,080 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Power consumption (TDP) | 33 Watt | 245 Watt |
| Texture fill rate | 17.98 | 138.0 |
| Floating-point processing power | 0.8632 TFLOPS | 3.312 TFLOPS |
| ROPs | 8 | 48 |
| TMUs | 16 | 240 |
| L1 Cache | 192 KB | 240 KB |
| L2 Cache | 1024 KB | 1536 KB |
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 x8 | PCIe 3.0 x16 |
| Length | no data | 267 mm |
| Width | no data | 2-slot |
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 | DDR3 | GDDR5 |
| Maximum RAM amount | 2 GB | 12 GB |
| Memory bus width | 64 Bit | 384 Bit |
| Memory clock speed | 1001 MHz | 1502 MHz |
| Memory bandwidth | 16.02 GB/s | 288.4 GB/s |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | No outputs | No outputs |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 12 (11_1) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 1.1.126 | 1.1.126 |
| CUDA | 5.0 | 3.5 |
Pros & cons summary
| Recency | 17 March 2014 | 22 November 2013 |
| Maximum RAM amount | 2 GB | 12 GB |
| Power consumption (TDP) | 33 Watt | 245 Watt |
GeForce 840A has an age advantage of 3 months, and 87% lower power consumption.
Tesla K40st, on the other hand, has a 500% higher maximum VRAM amount.
We couldn't decide between GeForce 840A and Tesla K40st. We've got no test results to judge.
Be aware that GeForce 840A is a notebook graphics card while Tesla K40st is a workstation one.
Other comparisons
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
