Radeon HD 6770 Green Edition vs GeForce 820A
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 995 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 6.59 | no data |
| Architecture | Fermi 2.0 (2010−2014) | TeraScale 2 (2009−2015) |
| GPU code name | GF117 | Juniper |
| Market segment | Laptop | Desktop |
| Release date | 17 March 2014 (10 years ago) | 19 April 2013 (11 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. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 96 | 720 |
| Core clock speed | 775 MHz | 700 MHz |
| Number of transistors | 585 million | 1,040 million |
| Manufacturing process technology | 28 nm | 40 nm |
| Power consumption (TDP) | 15 Watt | 86 Watt |
| Texture fill rate | 12.40 | 25.20 |
| Floating-point processing power | 0.2976 TFLOPS | 1.008 TFLOPS |
| ROPs | 8 | 16 |
| TMUs | 16 | 36 |
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 2.0 x16 |
| Length | no data | 170 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 | GDDR3 |
| Maximum RAM amount | 1 GB | 2 GB |
| Memory bus width | 64 Bit | 128 Bit |
| Memory clock speed | 900 MHz | 667 MHz |
| Memory bandwidth | 14.4 GB/s | 21.34 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 | 2x DVI, 1x HDMI, 2x mini-DisplayPort |
| HDMI | - | + |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 11.2 (11_0) |
| Shader Model | 5.1 | 5.0 |
| OpenGL | 4.6 | 4.4 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | N/A | N/A |
| CUDA | 2.1 | - |
Pros & cons summary
| Recency | 17 March 2014 | 19 April 2013 |
| Maximum RAM amount | 1 GB | 2 GB |
| Chip lithography | 28 nm | 40 nm |
| Power consumption (TDP) | 15 Watt | 86 Watt |
GeForce 820A has an age advantage of 10 months, a 42.9% more advanced lithography process, and 473.3% lower power consumption.
HD 6770 Green Edition, on the other hand, has a 100% higher maximum VRAM amount.
We couldn't decide between GeForce 820A and Radeon HD 6770 Green Edition. We've got no test results to judge.
Be aware that GeForce 820A is a notebook card while Radeon HD 6770 Green Edition is a desktop 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
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
