ATI Radeon HD 4870 Mac Edition vs HD 6620G
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1193 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 1.78 | no data |
| Architecture | TeraScale 2 (2009−2015) | TeraScale (2005−2013) |
| GPU code name | Sumo | RV770 |
| Market segment | Laptop | Desktop |
| Release date | 7 December 2011 (13 years ago) | 6 January 2009 (16 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 | 400 | 800 |
| Core clock speed | 444 MHz | 750 MHz |
| Number of transistors | 1,178 million | 956 million |
| Manufacturing process technology | 32 nm | 55 nm |
| Power consumption (TDP) | 35 Watt | 150 Watt |
| Texture fill rate | 8.880 | 30.00 |
| Floating-point processing power | 0.3552 TFLOPS | 1.2 TFLOPS |
| ROPs | 8 | 16 |
| TMUs | 20 | 40 |
| L1 Cache | no data | 160 KB |
| L2 Cache | no data | 256 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 | medium sized | no data |
| Interface | IGP | PCIe 2.0 x16 |
| Length | no data | 250 mm |
| Width | no data | 2-slot |
| Supplementary power connectors | no data | 2x 6-pin |
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 | System Shared | GDDR5 |
| Maximum RAM amount | System Shared | 512 MB |
| Memory bus width | System Shared | 256 Bit |
| Memory clock speed | System Shared | 850 MHz |
| Memory bandwidth | no data | 108.8 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 | No outputs | 1x DVI, 1x mini-DisplayPort |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 11.2 (11_0) | 10.1 (10_1) |
| Shader Model | 5.0 | 4.1 |
| OpenGL | 4.4 | 3.3 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | N/A | N/A |
Pros & cons summary
| Recency | 7 December 2011 | 6 January 2009 |
| Chip lithography | 32 nm | 55 nm |
| Power consumption (TDP) | 35 Watt | 150 Watt |
HD 6620G has an age advantage of 2 years, a 71.9% more advanced lithography process, and 328.6% lower power consumption.
We couldn't decide between Radeon HD 6620G and Radeon HD 4870 Mac Edition. We've got no test results to judge.
Be aware that Radeon HD 6620G is a notebook graphics card while Radeon HD 4870 Mac Edition is a desktop one.
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