T400 vs GeForce 8800 GTS 640
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | not rated | 548 |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | no data | 22.38 |
| Architecture | Tesla (2006−2010) | Turing (2018−2022) |
| GPU code name | G80 | TU117 |
| Market segment | Desktop | Workstation |
| Release date | 8 November 2006 (19 years ago) | 6 May 2021 (5 years ago) |
| Launch price (MSRP) | $449 | no data |
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Real power consumption of some graphics cards can well exceed their nominal TDP, especially if overclocked.
| Pipelines / CUDA cores | 96 | 384 |
| Core clock speed | 513 MHz | 420 MHz |
| Boost clock speed | no data | 1425 MHz |
| Number of transistors | 681 million | 4,700 million |
| Manufacturing process technology | 90 nm | 12 nm |
| Power consumption (TDP) | 143 Watt | 30 Watt |
| Texture fill rate | 24.62 | 34.20 |
| Floating-point processing power | 0.2281 TFLOPS | 1.094 TFLOPS |
| ROPs | 20 | 16 |
| TMUs | 24 | 24 |
| L1 Cache | no data | 384 KB |
| L2 Cache | 80 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 1.0 x16 | PCIe 3.0 x16 |
| Length | 267 mm | no data |
| Width | 2-slot | 1-slot |
| Supplementary power connectors | 1x 6-pin | 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 | GDDR3 | GDDR6 |
| Maximum RAM amount | 640 MB | 2 GB |
| Memory bus width | 320 Bit | 64 Bit |
| Memory clock speed | 792 MHz | 1250 MHz |
| Memory bandwidth | 63.36 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 | 2x DVI, 1x S-Video | 3x mini-DisplayPort |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 11.1 (10_0) | 12 (12_1) |
| Shader Model | 4.0 | 6.6 |
| OpenGL | 3.3 | 4.6 |
| OpenCL | 1.1 | 3.0 |
| Vulkan | N/A | 1.2 |
| CUDA | + | 7.5 |
Pros & cons summary
| Recency | 8 November 2006 | 6 May 2021 |
| Maximum RAM amount | 640 MB | 2 GB |
| Chip lithography | 90 nm | 12 nm |
| Power consumption (TDP) | 143 Watt | 30 Watt |
T400 has an age advantage of 14 years, a 220% higher maximum VRAM amount, a 650% more advanced lithography process, and 377% lower power consumption.
We couldn't decide between GeForce 8800 GTS 640 and T400. We've got no test results to judge.
Be aware that GeForce 8800 GTS 640 is a desktop graphics card while T400 is a workstation one.
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