GeForce GTX 660M vs Radeon R9 390 X2
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 779 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 5.35 |
| Architecture | GCN 2.0 (2013−2017) | Kepler (2012−2018) |
| GPU code name | Grenada | GK107 |
| Market segment | Desktop | Laptop |
| Release date | 3 September 2015 (10 years ago) | 22 March 2012 (13 years ago) |
| Launch price (MSRP) | $1,399 | no data |
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 | 2560 ×2 | 384 |
| Core clock speed | 1000 MHz | 835 MHz |
| Boost clock speed | no data | 950 MHz |
| Number of transistors | 6,200 million | 1,270 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Power consumption (TDP) | 580 Watt | 50 Watt |
| Texture fill rate | 160.0 ×2 | 30.40 |
| Floating-point processing power | 5.12 TFLOPS ×2 | 0.7296 TFLOPS |
| ROPs | 64 ×2 | 16 |
| TMUs | 160 ×2 | 32 |
| L1 Cache | 640 KB | 32 KB |
| L2 Cache | 1024 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).
| Laptop size | no data | large |
| Bus support | no data | PCI Express 2.0, PCI Express 3.0 |
| Interface | PCIe 3.0 x16 | MXM-B (3.0) |
| Width | 3-slot | no data |
| Supplementary power connectors | 4x 8-pin | no data |
| SLI options | - | + |
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 | 8 GB ×2 | 1 GB |
| Memory bus width | 512 Bit ×2 | 128bit |
| Memory clock speed | 1350 MHz | 2000 MHz |
| Memory bandwidth | 345.6 GB/s ×2 | 64.0 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 | 2x DVI, 1x HDMI, 1x DisplayPort | No outputs |
| HDMI | + | + |
| HDCP | - | + |
| Maximum VGA resolution | no data | Up to 2048x1536 |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| Optimus | - | + |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_0) | 12 API |
| Shader Model | 6.3 | 5.1 |
| OpenGL | 4.6 | 4.5 |
| OpenCL | 2.0 | 1.1 |
| Vulkan | 1.2.131 | 1.1.126 |
| CUDA | - | + |
Pros & cons summary
| Recency | 3 September 2015 | 22 March 2012 |
| Maximum RAM amount | 8 GB | 1 GB |
| Power consumption (TDP) | 580 Watt | 50 Watt |
R9 390 X2 has an age advantage of 3 years, and a 700% higher maximum VRAM amount.
GTX 660M, on the other hand, has 1060% lower power consumption.
We couldn't decide between Radeon R9 390 X2 and GeForce GTX 660M. We've got no test results to judge.
Be aware that Radeon R9 390 X2 is a desktop graphics card while GeForce GTX 660M is a notebook one.
Other comparisons
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