GeForce GTX 660 Rev. 2 vs Radeon HD 6790
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 649 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.34 | no data |
| Architecture | Terascale 2 (2009−2015) | Kepler (2012−2018) |
| GPU code name | Barts | GK104 |
| Market segment | Desktop | Desktop |
| Release date | 4 April 2011 (13 years ago) | 13 September 2014 (9 years ago) |
| Launch price (MSRP) | $149 | no data |
| Current price | $184 (1.2x MSRP) | $489 |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
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 | 800 | 960 |
| Core clock speed | 840 MHz | 980 MHz |
| Boost clock speed | no data | 1032 MHz |
| Number of transistors | 1,700 million | 3,540 million |
| Manufacturing process technology | 40 nm | 28 nm |
| Power consumption (TDP) | 150 Watt | 140 Watt |
| Texture fill rate | 33.60 | 82.56 |
| Floating-point performance | 1,344.0 gflops | 1,981 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 2.0 x16 | PCIe 3.0 x16 |
| Length | 198 mm | 241 mm |
| Width | 2-slot | 2-slot |
| Supplementary power connectors | 2x 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 | GDDR5 |
| Maximum RAM amount | 1 GB | 2 GB |
| Memory bus width | 256 Bit | 192 Bit |
| Memory clock speed | 1050 MHz | 6008 MHz |
| Memory bandwidth | 134.4 GB/s | 144.2 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 | 2x DVI, 1x HDMI, 1x DisplayPort | 2x DVI, 1x HDMI, 1x DisplayPort |
| HDMI | + | + |
API compatibility
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 11.2 (11_0) | 12 (11_0) |
| Shader Model | 5.0 | 5.1 |
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | N/A | 1.1.126 |
| CUDA | no data | 3.0 |
Pros & cons summary
| Recency | 4 April 2011 | 13 September 2014 |
| Maximum RAM amount | 1 GB | 2 GB |
| Chip lithography | 40 nm | 28 nm |
| Power consumption (TDP) | 150 Watt | 140 Watt |
We couldn't decide between Radeon HD 6790 and GeForce GTX 660 Rev. 2. 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.
Comparisons with similar GPUs
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