T400 vs GeForce 620M
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 539 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 22.20 |
| Architecture | Fermi 2.0 (2010−2014) | Turing (2018−2022) |
| GPU code name | GF117 | TU117 |
| Market segment | Laptop | Workstation |
| Release date | 22 March 2012 (14 years ago) | 6 May 2021 (4 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 | 384 |
| Core clock speed | 625 MHz | 420 MHz |
| Boost clock speed | no data | 1425 MHz |
| Number of transistors | 585 million | 4,700 million |
| Manufacturing process technology | 28 nm | 12 nm |
| Power consumption (TDP) | 15 Watt | 30 Watt |
| Texture fill rate | 10.00 | 34.20 |
| Floating-point processing power | 0.24 TFLOPS | 1.094 TFLOPS |
| ROPs | 8 | 16 |
| TMUs | 16 | 24 |
| L1 Cache | 128 KB | 384 KB |
| L2 Cache | 128 KB | 1024 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).
| Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| 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 | GDDR6 |
| Maximum RAM amount | 1 GB | 2 GB |
| Memory bus width | 64 Bit | 64 Bit |
| Memory clock speed | 900 MHz | 1250 MHz |
| Memory bandwidth | 14.4 GB/s | 80 GB/s |
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 | 3x mini-DisplayPort |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 12 (12_1) |
| Shader Model | 5.1 | 6.6 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.1 | 3.0 |
| Vulkan | N/A | 1.2 |
| CUDA | 2.1 | 7.5 |
Pros & cons summary
| Recency | 22 March 2012 | 6 May 2021 |
| Maximum RAM amount | 1 GB | 2 GB |
| Chip lithography | 28 nm | 12 nm |
| Power consumption (TDP) | 15 Watt | 30 Watt |
GeForce 620M has 100% lower power consumption.
T400, on the other hand, has an age advantage of 9 years, a 100% higher maximum VRAM amount, and a 133% more advanced lithography process.
We couldn't decide between GeForce 620M and T400. We've got no test results to judge.
Be aware that GeForce 620M is a notebook graphics card while T400 is a workstation one.
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