Radeon 660M vs HD 6770M Mac Edition
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 543 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 14.89 |
| Architecture | TeraScale 2 (2009−2015) | RDNA 2.0 (2020−2025) |
| GPU code name | Whistler | Rembrandt+ |
| Market segment | Laptop | Laptop |
| Release date | 28 January 2011 (14 years ago) | 3 January 2023 (2 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 | 480 | 384 |
| Core clock speed | 725 MHz | 1500 MHz |
| Boost clock speed | no data | 1900 MHz |
| Number of transistors | 716 million | 13,100 million |
| Manufacturing process technology | 40 nm | 6 nm |
| Power consumption (TDP) | 35 Watt | 40 Watt |
| Texture fill rate | 17.40 | 45.60 |
| Floating-point processing power | 0.696 TFLOPS | 1.459 TFLOPS |
| ROPs | 8 | 16 |
| TMUs | 24 | 24 |
| Ray Tracing Cores | no data | 6 |
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 | MXM-A (3.0) | PCIe 4.0 x8 |
| 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 | GDDR5 | System Shared |
| Maximum RAM amount | 512 MB | System Shared |
| Memory bus width | 128 Bit | System Shared |
| Memory clock speed | 900 MHz | System Shared |
| Memory bandwidth | 57.6 GB/s | no data |
| 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 | No outputs | Portable Device Dependent |
API and SDK compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 11.2 (11_0) | 12 Ultimate (12_2) |
| Shader Model | 5.0 | 6.7 |
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | N/A | 1.3 |
Pros & cons summary
| Recency | 28 January 2011 | 3 January 2023 |
| Chip lithography | 40 nm | 6 nm |
| Power consumption (TDP) | 35 Watt | 40 Watt |
HD 6770M Mac Edition has 14.3% lower power consumption.
Radeon 660M, on the other hand, has an age advantage of 11 years, and a 566.7% more advanced lithography process.
We couldn't decide between Radeon HD 6770M Mac Edition and Radeon 660M. We've got no test results to judge.
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