L40G vs GeForce GT 645M
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 888 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 5.36 | no data |
| Architecture | Kepler (2012−2018) | Ada Lovelace (2022−2024) |
| GPU code name | GK107 | AD102 |
| Market segment | Laptop | Workstation |
| Release date | 1 October 2012 (12 years ago) | 13 October 2022 (2 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 | 384 | 18176 |
| Core clock speed | Up to 710 MHz | 1005 MHz |
| Boost clock speed | no data | 2475 MHz |
| Number of transistors | 1,270 million | 76,300 million |
| Manufacturing process technology | 28 nm | 4 nm |
| Power consumption (TDP) | 32 Watt | 300 Watt |
| Texture fill rate | 22.69 | 1,406 |
| Floating-point processing power | 0.5445 TFLOPS | 89.97 TFLOPS |
| ROPs | 16 | 192 |
| TMUs | 32 | 568 |
| Tensor Cores | no data | 568 |
| Ray Tracing Cores | no data | 142 |
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 | PCIe 4.0 x16 |
| Length | no data | 267 mm |
| Width | no data | 2-slot |
| Supplementary power connectors | no data | 1x 16-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\GDDR5 | GDDR6 |
| Maximum RAM amount | 2 GB | 24 GB |
| Memory bus width | 128bit | 384 Bit |
| Memory clock speed | 900 MHz | 2250 MHz |
| Memory bandwidth | Up to 64.0 GB/s | 864.0 GB/s |
| Shared memory | - | - |
| Resizable BAR | - | + |
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 | 1x HDMI 2.1, 3x DisplayPort 1.4a |
| 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 | 12 Ultimate (12_2) |
| Shader Model | 5.1 | 6.7 |
| OpenGL | 4.5 | 4.6 |
| OpenCL | 1.1 | 3.0 |
| Vulkan | 1.1.126 | 1.3 |
| CUDA | + | 8.9 |
| DLSS | - | + |
Pros & cons summary
| Recency | 1 October 2012 | 13 October 2022 |
| Maximum RAM amount | 2 GB | 24 GB |
| Chip lithography | 28 nm | 4 nm |
| Power consumption (TDP) | 32 Watt | 300 Watt |
GT 645M has 837.5% lower power consumption.
L40G, on the other hand, has an age advantage of 10 years, a 1100% higher maximum VRAM amount, and a 600% more advanced lithography process.
We couldn't decide between GeForce GT 645M and L40G. We've got no test results to judge.
Be aware that GeForce GT 645M is a notebook graphics card while L40G is a workstation one.
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