Xbox XGPU-B vs GeForce GT 640M
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 844 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | Kepler (2012−2018) | Kelvin (2001−2003) |
| GPU code name | N13P-GS | NV2A |
| Market segment | Laptop | Desktop |
| Release date | 22 March 2012 (12 years ago) | 15 November 2001 (22 years ago) |
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 | 384 | no data |
| CUDA cores | 384 | no data |
| Core clock speed | Up to 625 MHz | 233 MHz |
| Boost clock speed | 645 MHz | no data |
| Number of transistors | 1,270 million | 57 million |
| Manufacturing process technology | 28 nm | 150 nm |
| Power consumption (TDP) | 32 Watt | no data |
| Texture fill rate | 20.00 | 1.864 |
| Floating-point performance | 0.48 gflops | no data |
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 3.0 x16 | AGP 4x |
| Width | no data | IGP |
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\GDDR5 | DDR |
| Maximum RAM amount | 2 GB | 64 MB |
| Memory bus width | 128bit | 128 Bit |
| Memory clock speed | 1800 - 4000 MHz | 400 MHz |
| Memory bandwidth | Up to 64.0 GB/s | 6.4 GB/s |
| Shared memory | - | no data |
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 | No outputs | No outputs |
| 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 compatibility
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 12 API | 8.1 |
| Shader Model | 5.1 | no data |
| OpenGL | 4.5 | 1.4 |
| OpenCL | 1.1 | N/A |
| Vulkan | 1.1.126 | N/A |
| CUDA | + | - |
Pros & cons summary
| Recency | 22 March 2012 | 15 November 2001 |
| Maximum RAM amount | 2 GB | 64 MB |
| Chip lithography | 28 nm | 150 nm |
GT 640M has an age advantage of 10 years, a 3100% higher maximum VRAM amount, and a 435.7% more advanced lithography process.
We couldn't decide between GeForce GT 640M and Xbox XGPU-B. We've got no test results to judge.
Be aware that GeForce GT 640M is a notebook card while Xbox XGPU-B is a desktop one.
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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