GeForce GT 640M Mac Edition vs 9400 GT
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 1094 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 2.27 |
| Architecture | Tesla (2006−2010) | Kepler (2012−2018) |
| GPU code name | G96C | GK107 |
| Market segment | Desktop | Laptop |
| Release date | 27 August 2008 (16 years ago) | 3 February 2013 (11 years ago) |
| Launch price (MSRP) | $79.99 | 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 | 16 | 384 |
| Core clock speed | 550 MHz | 745 MHz |
| Number of transistors | 314 million | 1,270 million |
| Manufacturing process technology | 55 nm | 28 nm |
| Power consumption (TDP) | 50 Watt | 32 Watt |
| Maximum GPU temperature | 105 °C | no data |
| Texture fill rate | 4.400 | 23.84 |
| Floating-point processing power | 0.0448 TFLOPS | 0.5722 TFLOPS |
| ROPs | 4 | 8 |
| TMUs | 8 | 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-E 2.0 | no data |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Length | 168 mm | no data |
| Height | 4.376" (11.1 cm) | no data |
| Width | 1-slot | no data |
| Supplementary power connectors | None | 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 | DDR2 | GDDR5 |
| Maximum RAM amount | 512 MB | 512 MB |
| Memory bus width | 128 Bit | 64 Bit |
| Memory clock speed | 400 MHz | 1250 MHz |
| Memory bandwidth | 12.8 GB/s | 40 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 | Dual Link DVI | No outputs |
| Multi monitor support | + | no data |
| HDMI | + | - |
| Maximum VGA resolution | 2048x1536 | no data |
| Audio input for HDMI | S/PDIF | no data |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 11.1 (10_0) | 12 (11_0) |
| Shader Model | 4.0 | 5.1 |
| OpenGL | 2.1 | 4.6 |
| OpenCL | 1.1 | 1.2 |
| Vulkan | N/A | 1.1.126 |
| CUDA | + | 3.0 |
Pros & cons summary
| Recency | 27 August 2008 | 3 February 2013 |
| Chip lithography | 55 nm | 28 nm |
| Power consumption (TDP) | 50 Watt | 32 Watt |
GT 640M Mac Edition has an age advantage of 4 years, a 96.4% more advanced lithography process, and 56.3% lower power consumption.
We couldn't decide between GeForce 9400 GT and GeForce GT 640M Mac Edition. We've got no test results to judge.
Be aware that GeForce 9400 GT is a desktop card while GeForce GT 640M Mac Edition is a notebook one.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
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