T400 vs GeForce GT 640 OEM
Aggregate performance score
We've compared GeForce GT 640 OEM with T400, including specs and performance data.
T400 outperforms GT 640 OEM by a whopping 453% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 932 | 470 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 2.37 | 21.85 |
| Architecture | Kepler (2012−2018) | Turing (2018−2022) |
| GPU code name | GK107 | TU117 |
| Market segment | Desktop | Workstation |
| Release date | 24 April 2012 (12 years ago) | 6 May 2021 (3 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 | 384 |
| Core clock speed | 797 MHz | 420 MHz |
| Boost clock speed | no data | 1425 MHz |
| Number of transistors | 1,270 million | 4,700 million |
| Manufacturing process technology | 28 nm | 12 nm |
| Power consumption (TDP) | 50 Watt | 30 Watt |
| Texture fill rate | 25.50 | 34.20 |
| Floating-point processing power | 0.6121 TFLOPS | 1.094 TFLOPS |
| ROPs | 16 | 16 |
| TMUs | 32 | 24 |
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 3.0 x16 | PCIe 3.0 x16 |
| Length | 145 mm | no data |
| Width | 1-slot | 1-slot |
| Supplementary power connectors | None | 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 | 2 GB | 2 GB |
| Memory bus width | 128 Bit | 64 Bit |
| Memory clock speed | 891 MHz | 1250 MHz |
| Memory bandwidth | 28.51 GB/s | 80 GB/s |
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 | 1x DVI, 1x HDMI, 1x DisplayPort | 3x mini-DisplayPort |
| HDMI | + | - |
API compatibility
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 | 1.2 | 3.0 |
| Vulkan | 1.1.126 | 1.2 |
| CUDA | 3.0 | 7.5 |
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Pros & cons summary
| Performance score | 1.70 | 9.40 |
| Recency | 24 April 2012 | 6 May 2021 |
| Chip lithography | 28 nm | 12 nm |
| Power consumption (TDP) | 50 Watt | 30 Watt |
T400 has a 452.9% higher aggregate performance score, an age advantage of 9 years, a 133.3% more advanced lithography process, and 66.7% lower power consumption.
The T400 is our recommended choice as it beats the GeForce GT 640 OEM in performance tests.
Be aware that GeForce GT 640 OEM is a desktop card while T400 is a workstation 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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