GeForce GT 640M Mac Edition vs 820A
Aggregate performance score
We've compared GeForce 820A and GeForce GT 640M Mac Edition, covering specs and all relevant benchmarks.
820A outperforms 640M Mac Edition by a considerable 40% based on our aggregate benchmark results.
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1069 | 1183 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 6.86 | 2.30 |
| Architecture | Fermi 2.0 (2010−2014) | Kepler (2012−2018) |
| GPU code name | GF117 | GK107 |
| Market segment | Laptop | Laptop |
| Release date | 17 March 2014 (12 years ago) | 3 February 2013 (13 years ago) |
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 | 96 | 384 |
| Core clock speed | 775 MHz | 745 MHz |
| Number of transistors | 585 million | 1,270 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Power consumption (TDP) | 15 Watt | 32 Watt |
| Texture fill rate | 12.40 | 23.84 |
| Floating-point processing power | 0.2976 TFLOPS | 0.5722 TFLOPS |
| ROPs | 8 | 8 |
| TMUs | 16 | 32 |
| L1 Cache | 128 KB | 32 KB |
| L2 Cache | 128 KB | 128 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 2.0 x16 | PCIe 3.0 x16 |
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 | 1 GB | 512 MB |
| Memory bus width | 64 Bit | 64 Bit |
| Memory clock speed | 900 MHz | 1250 MHz |
| Memory bandwidth | 14.4 GB/s | 40 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_0) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | N/A | 1.1.126 |
| CUDA | 2.1 | 3.0 |
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 | 1.33 | 0.95 |
| Recency | 17 March 2014 | 3 February 2013 |
| Maximum RAM amount | 1 GB | 512 MB |
| Power consumption (TDP) | 15 Watt | 32 Watt |
GeForce 820A has a 40% higher aggregate performance score, an age advantage of 1 year, a 100% higher maximum VRAM amount, and 113% lower power consumption.
The GeForce 820A is our recommended choice as it beats the GeForce GT 640M Mac Edition in performance tests.
Other comparisons
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