GeForce GT 640 OEM vs GTX 660
Aggregate performance score
We've compared GeForce GTX 660 and GeForce GT 640 OEM, covering specs and all relevant benchmarks.
GTX 660 outperforms GT 640 OEM by a whopping 509% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 434 | 927 |
| Place by popularity | 58 | not in top-100 |
| Cost-effectiveness evaluation | 3.27 | no data |
| Power efficiency | 5.12 | 2.35 |
| Architecture | Kepler (2012−2018) | Kepler (2012−2018) |
| GPU code name | GK106 | GK107 |
| Market segment | Desktop | Desktop |
| Release date | 6 September 2012 (12 years ago) | 24 April 2012 (12 years ago) |
| Launch price (MSRP) | $229 | no data |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
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 | 960 | 384 |
| Core clock speed | 980 MHz | 797 MHz |
| Boost clock speed | 1033 MHz | no data |
| Number of transistors | 2,540 million | 1,270 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Power consumption (TDP) | 140 Watt | 50 Watt |
| Texture fill rate | 82.56 | 25.50 |
| Floating-point processing power | 1.981 TFLOPS | 0.6121 TFLOPS |
| ROPs | 24 | 16 |
| TMUs | 80 | 32 |
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).
| Bus support | PCI Express 3.0 | no data |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Length | 241 mm | 145 mm |
| Height | 4.376" (11.1 cm) | no data |
| Width | 2-slot | 1-slot |
| Supplementary power connectors | 1x 6-pin | None |
| 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 | DDR3 |
| Maximum RAM amount | 2 GB | 2 GB |
| Memory bus width | 192-bit GDDR5 | 128 Bit |
| Memory clock speed | 6.0 GB/s | 891 MHz |
| Memory bandwidth | 144.2 GB/s | 28.51 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 | One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort | 1x DVI, 1x HDMI, 1x DisplayPort |
| Multi monitor support | 4 displays | no data |
| HDMI | + | + |
| HDCP | + | - |
| Maximum VGA resolution | 2048x1536 | no data |
| Audio input for HDMI | Internal | no data |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| 3D Blu-Ray | + | - |
| 3D Gaming | + | - |
| 3D Vision | + | - |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 12 (11_0) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.3 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 1.1.126 | 1.1.126 |
| CUDA | + | 3.0 |
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Average FPS across all PC games
Here are the average frames per second in a large set of popular games across different resolutions:
| Full HD | 47
+571%
| 7−8
−571%
|
Cost per frame, $
| 1080p | 4.87 | no data |
Pros & cons summary
| Performance score | 10.36 | 1.70 |
| Recency | 6 September 2012 | 24 April 2012 |
| Power consumption (TDP) | 140 Watt | 50 Watt |
GTX 660 has a 509.4% higher aggregate performance score, and an age advantage of 4 months.
GT 640 OEM, on the other hand, has 180% lower power consumption.
The GeForce GTX 660 is our recommended choice as it beats the GeForce GT 640 OEM in performance tests.
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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