ATI Radeon HD 4870 Mac Edition vs R8 M445DX
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 880 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | GCN 3.0 (2014−2019) | TeraScale (2005−2013) |
| GPU code name | Meso | RV770 |
| Market segment | Laptop | Desktop |
| Release date | 15 May 2016 (8 years ago) | 6 January 2009 (15 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 | 320 | 800 |
| Core clock speed | 780 MHz | 750 MHz |
| Boost clock speed | 1021 MHz | no data |
| Number of transistors | 1,550 million | 956 million |
| Manufacturing process technology | 28 nm | 55 nm |
| Power consumption (TDP) | no data | 150 Watt |
| Texture fill rate | 20.42 | 30.00 |
| Floating-point processing power | 0.6534 TFLOPS | 1.2 TFLOPS |
| ROPs | 8 | 16 |
| TMUs | 20 | 40 |
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
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 | 1x DVI, 1x mini-DisplayPort |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_0) | 10.1 (10_1) |
| Shader Model | 6.0 | 4.1 |
| OpenGL | 4.6 | 3.3 |
| OpenCL | 2.0 | 1.1 |
| Vulkan | 1.2.131 | N/A |
Pros & cons summary
| Recency | 15 May 2016 | 6 January 2009 |
| Chip lithography | 28 nm | 55 nm |
R8 M445DX has an age advantage of 7 years, and a 96.4% more advanced lithography process.
We couldn't decide between Radeon R8 M445DX and Radeon HD 4870 Mac Edition. We've got no test results to judge.
Be aware that Radeon R8 M445DX is a notebook card while Radeon HD 4870 Mac 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.
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