Tesla K20m vs Tesla K40c
Aggregated performance score
Tesla K40c outperforms Tesla K20m by 1% based on our aggregated benchmark results.
General info
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 378 | 382 |
| Place by popularity | not in top-100 | not in top-100 |
| Value for money | 4.05 | 0.25 |
| Architecture | Kepler (2012−2018) | Kepler (2012−2018) |
| GPU code name | GK180 | GK110 |
| Market segment | Workstation | Workstation |
| Release date | 8 October 2013 (10 years old) | 5 January 2013 (11 years old) |
| Launch price (MSRP) | $7,699 | $3,199 |
| Current price | $360 (0x MSRP) | $5781 (1.8x MSRP) |
Value for money
Performance to price ratio. The higher, the better.
Tesla K40c has 1520% better value for money than Tesla K20m.
Technical specs
General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 2880 | 2496 |
| Core clock speed | 745 MHz | 706 MHz |
| Boost clock speed | 876 MHz | no data |
| Number of transistors | 7,080 million | 7,080 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Power consumption (TDP) | 245 Watt | 225 Watt |
| Texture fill rate | 210.2 | 146.8 |
| Floating-point performance | 4,291 gflops | 3,524 gflops |
Size and 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 2.0 x16 |
| Length | 267 mm | 267 mm |
| Width | 2-slot | 2-slot |
| Supplementary power connectors | 1x 6-pin + 1x 8-pin | 1x 6-pin + 1x 8-pin |
Memory
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 | 12 GB | 5 GB |
| Memory bus width | 384 Bit | 320 Bit |
| Memory clock speed | 6008 MHz | 5200 MHz |
| Memory bandwidth | 288.4 GB/s | 208.0 GB/s |
Video outputs and ports
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 support
List of supported graphics 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 | 1.1.103 | 1.1.126 |
| CUDA | 3.5 | 3.5 |
Synthetic benchmark performance
Non-gaming benchmark performance comparison. The combined score is measured on a 0-100 point scale.
Combined synthetic benchmark score
This is our combined benchmark performance score. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.
Tesla K40c outperforms Tesla K20m by 1% based on our aggregated benchmark results.
Passmark
This is the most ubiquitous GPU benchmark, part of Passmark PerformanceTest suite. It gives the graphics card a thorough evaluation under various types of load, providing four separate benchmarks for Direct3D versions 9, 10, 11 and 12 (the last being done in 4K resolution if possible), and few more tests engaging DirectCompute capabilities.
Benchmark coverage: 25%
Tesla K40c outperforms Tesla K20m by 1% in Passmark.
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Advantages and disadvantages
| Performance score | 11.60 | 11.44 |
| Recency | 8 October 2013 | 5 January 2013 |
| Cost | $7699 | $3199 |
| Maximum RAM amount | 12 GB | 5 GB |
| Power consumption (TDP) | 245 Watt | 225 Watt |
Given the minimal performance differences, no clear winner can be declared between Tesla K40c and Tesla K20m.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
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