Tesla K40c vs Tesla K8
Aggregate performance score
We've compared Tesla K8 and Tesla K40c, covering specs and all relevant benchmarks.
Tesla K40c outperforms Tesla K8 by a significant 21% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 459 | 408 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | no data | 0.26 |
| Power efficiency | 6.73 | 3.32 |
| Architecture | Kepler (2012−2018) | Kepler (2012−2018) |
| GPU code name | GK104 | GK180 |
| Market segment | Workstation | Workstation |
| Release date | 16 September 2014 (10 years ago) | 8 October 2013 (11 years ago) |
| Launch price (MSRP) | no data | $7,699 |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
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 | 1536 | 2880 |
| Core clock speed | 693 MHz | 745 MHz |
| Boost clock speed | 811 MHz | 876 MHz |
| Number of transistors | 3,540 million | 7,080 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Power consumption (TDP) | 100 Watt | 245 Watt |
| Texture fill rate | 103.8 | 210.2 |
| Floating-point processing power | 2.491 TFLOPS | 5.046 TFLOPS |
| ROPs | 32 | 48 |
| TMUs | 128 | 240 |
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 2.0 x16 | PCIe 3.0 x16 |
| Length | 241 mm | 267 mm |
| Width | 1-slot | 2-slot |
| Supplementary power connectors | 1x 6-pin | 1x 6-pin + 1x 8-pin |
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 | GDDR5 |
| Maximum RAM amount | 8 GB | 12 GB |
| Memory bus width | 256 Bit | 384 Bit |
| Memory clock speed | 1250 MHz | 1502 MHz |
| Memory bandwidth | 160.0 GB/s | 288.4 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 | No outputs |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 12 (11_0) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 1.1.126 | 1.1.103 |
| CUDA | 3.0 | 3.5 |
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Pros & cons summary
| Performance score | 9.65 | 11.65 |
| Recency | 16 September 2014 | 8 October 2013 |
| Maximum RAM amount | 8 GB | 12 GB |
| Power consumption (TDP) | 100 Watt | 245 Watt |
Tesla K8 has an age advantage of 11 months, and 145% lower power consumption.
Tesla K40c, on the other hand, has a 20.7% higher aggregate performance score, and a 50% higher maximum VRAM amount.
The Tesla K40c is our recommended choice as it beats the Tesla K8 in performance tests.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
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