Radeon HD 7970 X2 vs GeForce GT 650M Mac Edition
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 915 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | Kepler (2012−2018) | GCN 1.0 (2012−2020) |
| GPU code name | GK107 | New Zealand |
| Market segment | Desktop | Desktop |
| Release date | 12 July 2012 (11 years ago) | 31 August 2012 (11 years ago) |
| Launch price (MSRP) | no data | $899 |
| Current price | $50 | $316 (0.4x MSRP) |
Detailed specifications
General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 384 | 2048 |
| Core clock speed | 900 MHz | 925 MHz |
| Number of transistors | 1,270 million | 4,313 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Power consumption (TDP) | 45 Watt | 500 Watt |
| Texture fill rate | 28.80 | 118.4 |
| Floating-point performance | 691.2 gflops | 2x 3,789 gflops |
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 3.0 x16 |
| Length | no data | 292 mm |
| Width | no data | 2-slot |
| Supplementary power connectors | no data | 3x 8-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 | GDDR5 |
| Maximum RAM amount | 512 MB | 3 GB |
| Memory bus width | 128 Bit | 384 Bit |
| Memory clock speed | 5016 MHz | 5500 MHz |
| Memory bandwidth | 80.26 GB/s | 264.0 GB/s |
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, 4x mini-DisplayPort |
API compatibility
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 12 (11_1) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 1.1.126 | 1.2.131 |
| CUDA | 3.0 | no data |
Pros & cons summary
| Recency | 12 July 2012 | 31 August 2012 |
| Maximum RAM amount | 512 MB | 3 GB |
| Power consumption (TDP) | 45 Watt | 500 Watt |
We couldn't decide between GeForce GT 650M Mac Edition and Radeon HD 7970 X2. We've got no test results to judge.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
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