GeForce GT 640 OEM Rebrand vs GT 540M
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1101 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 2.46 | no data |
| Architecture | Fermi (2010−2014) | Fermi 2.0 (2010−2014) |
| GPU code name | GF108 | GF116 |
| Market segment | Laptop | Desktop |
| Release date | 5 January 2011 (14 years ago) | 24 April 2012 (13 years ago) |
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 | 96 | 144 |
| Core clock speed | 672 MHz | 720 MHz |
| Number of transistors | 585 million | 1,170 million |
| Manufacturing process technology | 40 nm | 40 nm |
| Power consumption (TDP) | 35 Watt | 75 Watt |
| Texture fill rate | 10.75 | 17.28 |
| Floating-point processing power | 0.258 TFLOPS | 0.4147 TFLOPS |
| ROPs | 4 | 24 |
| TMUs | 16 | 24 |
| L1 Cache | 128 KB | 192 KB |
| L2 Cache | 256 KB | 384 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 | large | no data |
| Interface | MXM-A (3.0) | PCIe 2.0 x16 |
| Length | no data | 145 mm |
| Width | no data | 1-slot |
| Supplementary power connectors | no data | None |
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 | DDR3 |
| Maximum RAM amount | 2 GB | 1536 MB |
| Memory bus width | 128 Bit | 192 Bit |
| Memory clock speed | 900 MHz | 800 MHz |
| Memory bandwidth | 28.8 GB/s | 38.4 GB/s |
| Shared memory | - | no data |
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 mini-HDMI |
| HDMI | - | + |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| 3D Blu-Ray | + | - |
| 3D Gaming | + | - |
| Optimus | + | - |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 API | 12 (11_0) |
| Shader Model | 5.1 | 5.1 |
| OpenGL | 4.5 | 4.6 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | N/A | N/A |
| CUDA | + | 2.1 |
Pros & cons summary
| Recency | 5 January 2011 | 24 April 2012 |
| Maximum RAM amount | 2 GB | 1536 MB |
| Power consumption (TDP) | 35 Watt | 75 Watt |
GT 540M has a 33.3% higher maximum VRAM amount, and 114.3% lower power consumption.
GT 640 OEM Rebrand, on the other hand, has an age advantage of 1 year.
We couldn't decide between GeForce GT 540M and GeForce GT 640 OEM Rebrand. We've got no test results to judge.
Be aware that GeForce GT 540M is a notebook graphics card while GeForce GT 640 OEM Rebrand is a desktop one.
Other comparisons
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