ATI Radeon HD 3870 Mac Edition vs GeForce GTX 660 OEM
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 804 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 1.83 | no data |
| Architecture | Kepler (2012−2018) | TeraScale (2005−2013) |
| GPU code name | GK104 | RV670 |
| Market segment | Desktop | Desktop |
| Release date | 22 August 2012 (13 years ago) | 12 June 2008 (17 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 | 1152 | 320 |
| Core clock speed | 823 MHz | 777 MHz |
| Boost clock speed | 888 MHz | no data |
| Number of transistors | 3,540 million | 666 million |
| Manufacturing process technology | 28 nm | 55 nm |
| Power consumption (TDP) | 130 Watt | 106 Watt |
| Texture fill rate | 85.25 | 12.43 |
| Floating-point processing power | 2.046 TFLOPS | 0.4973 TFLOPS |
| ROPs | 32 | 16 |
| TMUs | 96 | 16 |
| L1 Cache | 96 KB | no data |
| L2 Cache | 512 KB | 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).
| Interface | PCIe 3.0 x16 | PCIe 2.0 x16 |
| Length | 241 mm | 241 mm |
| Width | 2-slot | 1-slot |
| Supplementary power connectors | 1x 6-pin | 1x 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 | GDDR5 | GDDR4 |
| Maximum RAM amount | 2 GB | 512 MB |
| Memory bus width | 256 Bit | 256 Bit |
| Memory clock speed | 1400 MHz | 1126 MHz |
| Memory bandwidth | 179.2 GB/s | 72.06 GB/s |
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, 1x DisplayPort | 2x DVI, 1x S-Video |
| HDMI | + | - |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 10.1 (10_1) |
| Shader Model | 5.1 | 4.1 |
| OpenGL | 4.6 | 3.3 |
| OpenCL | 1.2 | N/A |
| Vulkan | 1.1.126 | N/A |
| CUDA | 3.0 | - |
Pros & cons summary
| Recency | 22 August 2012 | 12 June 2008 |
| Maximum RAM amount | 2 GB | 512 MB |
| Chip lithography | 28 nm | 55 nm |
| Power consumption (TDP) | 130 Watt | 106 Watt |
GTX 660 OEM has an age advantage of 4 years, a 300% higher maximum VRAM amount, and a 96.4% more advanced lithography process.
ATI HD 3870 Mac Edition, on the other hand, has 22.6% lower power consumption.
We couldn't decide between GeForce GTX 660 OEM and Radeon HD 3870 Mac Edition. We've got no test results to judge.
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