GeForce 7900 GX2 vs GT 640M LE
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 968 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.02 | no data |
| Power efficiency | 3.98 | no data |
| Architecture | Fermi (2010−2014) | Curie (2003−2013) |
| GPU code name | GF108 | G71 |
| Market segment | Laptop | Desktop |
| Release date | 4 May 2012 (13 years ago) | 30 April 2006 (19 years ago) |
| Launch price (MSRP) | $849.99 | $599 |
Cost-effectiveness evaluation
The higher the performance-to-price ratio, the better. We use the manufacturer's recommended prices for comparison.
Performance to price scatter graph
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 | Up to 384 | no data |
| Core clock speed | Up to 500 MHz | 500 MHz |
| Number of transistors | 585 million | 278 million |
| Manufacturing process technology | 40 nm | 90 nm |
| Power consumption (TDP) | 20 Watt | no data |
| Texture fill rate | 12.05 | 12.00 ×2 |
| Floating-point processing power | 0.289 TFLOPS | no data |
| ROPs | 4 | 16 ×2 |
| TMUs | 16 | 24 ×2 |
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 | medium sized | no data |
| Bus support | PCI Express 2.0, PCI Express 3.0 | no data |
| Interface | PCIe 2.0 x16 | PCIe 1.0 x16 |
| Length | no data | 312 mm |
| Width | no data | 2-slot |
| Supplementary power connectors | no data | 2x 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 | DDR3\DDR5 | GDDR3 |
| Maximum RAM amount | 2 GB | 512 MB ×2 |
| Memory bus width | 128bit | 256 Bit ×2 |
| Memory clock speed | 785 MHz | 600 MHz |
| Memory bandwidth | Up to 28.8 GB/s | 38.4 GB/s ×2 |
| 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 | No outputs | 2x DVI, 1x S-Video |
| HDMI | + | - |
| HDCP | + | - |
| Maximum VGA resolution | Up to 2048x1536 | no data |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| 3D Blu-Ray | + | - |
| Optimus | + | - |
API and SDK compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 API | 9.0c (9_3) |
| Shader Model | 5.1 | 3.0 |
| OpenGL | 4.5 | 2.1 |
| OpenCL | 1.1 | N/A |
| Vulkan | N/A | N/A |
| CUDA | + | - |
Pros & cons summary
| Recency | 4 May 2012 | 30 April 2006 |
| Maximum RAM amount | 2 GB | 512 MB |
| Chip lithography | 40 nm | 90 nm |
GT 640M LE has an age advantage of 6 years, a 300% higher maximum VRAM amount, and a 125% more advanced lithography process.
We couldn't decide between GeForce GT 640M LE and GeForce 7900 GX2. We've got no test results to judge.
Be aware that GeForce GT 640M LE is a notebook graphics card while GeForce 7900 GX2 is a desktop one.
Other comparisons
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