ATI Radeon HD 4870 Mac Edition vs HD 6450M
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1239 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | TeraScale 2 (2009−2015) | TeraScale (2005−2013) |
| GPU code name | Seymour | RV770 |
| Market segment | Laptop | Desktop |
| Release date | 4 January 2011 (14 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 | 160 | 800 |
| Core clock speed | 600 MHz | 750 MHz |
| Number of transistors | 370 million | 956 million |
| Manufacturing process technology | 40 nm | 55 nm |
| Power consumption (TDP) | no data | 150 Watt |
| Texture fill rate | 4.800 | 30.00 |
| Floating-point processing power | 0.192 TFLOPS | 1.2 TFLOPS |
| ROPs | 4 | 16 |
| TMUs | 8 | 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).
| Interface | PCIe 2.0 x16 | 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 | DDR3 | GDDR5 |
| Maximum RAM amount | 1 GB | 512 MB |
| Memory bus width | 64 Bit | 256 Bit |
| Memory clock speed | 800 MHz | 850 MHz |
| Memory bandwidth | 12.8 GB/s | 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 compatibility
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 | 4 January 2011 | 6 January 2009 |
| Maximum RAM amount | 1 GB | 512 MB |
| Chip lithography | 40 nm | 55 nm |
HD 6450M has an age advantage of 1 year, a 100% higher maximum VRAM amount, and a 37.5% more advanced lithography process.
We couldn't decide between Radeon HD 6450M and Radeon HD 4870 Mac Edition. We've got no test results to judge.
Be aware that Radeon HD 6450M is a notebook graphics card while Radeon HD 4870 Mac Edition is a desktop one.
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