Tesla K40st vs Iris Plus Graphics 640
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 701 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | Generation 9.5 (2016−2018) | Kepler (2012−2018) |
| GPU code name | Kaby Lake GT3e | GK110B |
| Market segment | Laptop | Workstation |
| Release date | 3 January 2017 (7 years ago) | 22 November 2013 (10 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. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 384 | 2880 |
| Core clock speed | 300 MHz | 575 MHz |
| Boost clock speed | 1100 MHz | no data |
| Number of transistors | 189 million | 7,080 million |
| Manufacturing process technology | 14 nm++ | 28 nm |
| Power consumption (TDP) | 15 Watt | 245 Watt |
| Texture fill rate | 52.80 | 138.0 |
| Floating-point processing power | 0.8448 TFLOPS | 3.312 TFLOPS |
| ROPs | 6 | 48 |
| TMUs | 48 | 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 | Ring Bus | 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 | DDR3L/LPDDR3/DDR4 | GDDR5 |
| Maximum RAM amount | 32 GB | 12 GB |
| Memory bus width | System Shared | 384 Bit |
| Memory clock speed | System Shared | 1502 MHz |
| Memory bandwidth | no data | 288.4 GB/s |
| Shared memory | + | - |
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 | Portable Device Dependent | No outputs |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| Quick Sync | + | no data |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_1) | 12 (11_1) |
| Shader Model | 6.4 | 5.1 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 3.0 | 1.2 |
| Vulkan | 1.3 | 1.1.126 |
| CUDA | - | 3.5 |
Pros & cons summary
| Recency | 3 January 2017 | 22 November 2013 |
| Maximum RAM amount | 32 GB | 12 GB |
| Chip lithography | 14 nm | 28 nm |
| Power consumption (TDP) | 15 Watt | 245 Watt |
Iris Plus Graphics 640 has an age advantage of 3 years, a 166.7% higher maximum VRAM amount, a 100% more advanced lithography process, and 1533.3% lower power consumption.
We couldn't decide between Iris Plus Graphics 640 and Tesla K40st. We've got no test results to judge.
Be aware that Iris Plus Graphics 640 is a notebook card while Tesla K40st is a workstation one.
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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