Radeon RX 640 vs HD 6770 Green Edition
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 660 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 7.92 |
| Architecture | TeraScale 2 (2009−2015) | GCN 4.0 (2016−2020) |
| GPU code name | Juniper | Polaris 23 |
| Market segment | Desktop | Laptop |
| Release date | 19 April 2013 (12 years ago) | 13 May 2019 (6 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 | 720 | 640 |
| Core clock speed | 700 MHz | 1082 MHz |
| Boost clock speed | no data | 1218 MHz |
| Number of transistors | 1,040 million | 2,200 million |
| Manufacturing process technology | 40 nm | 14 nm |
| Power consumption (TDP) | 86 Watt | 50 Watt |
| Texture fill rate | 25.20 | 48.72 |
| Floating-point processing power | 1.008 TFLOPS | 1.559 TFLOPS |
| ROPs | 16 | 16 |
| TMUs | 36 | 40 |
| L1 Cache | 72 KB | 160 KB |
| L2 Cache | 256 KB | 512 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).
| Laptop size | no data | large |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x8 |
| Length | 170 mm | no data |
| Width | 2-slot | no data |
| Supplementary power connectors | no data | None |
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 | GDDR3 | GDDR5 |
| Maximum RAM amount | 2 GB | 2 GB |
| Memory bus width | 128 Bit | 64 Bit |
| Memory clock speed | 667 MHz | 1500 MHz |
| Memory bandwidth | 21.34 GB/s | 48 GB/s |
| Shared memory | - | - |
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 | 2x DVI, 1x HDMI, 2x mini-DisplayPort | No outputs |
| HDMI | + | - |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| FreeSync | - | + |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 11.2 (11_0) | 12 (12_0) |
| Shader Model | 5.0 | 6.4 |
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | N/A | 1.2.131 |
Pros & cons summary
| Recency | 19 April 2013 | 13 May 2019 |
| Chip lithography | 40 nm | 14 nm |
| Power consumption (TDP) | 86 Watt | 50 Watt |
RX 640 has an age advantage of 6 years, a 185.7% more advanced lithography process, and 72% lower power consumption.
We couldn't decide between Radeon HD 6770 Green Edition and Radeon RX 640. We've got no test results to judge.
Be aware that Radeon HD 6770 Green Edition is a desktop graphics card while Radeon RX 640 is a notebook one.
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