GeForce 6800 GT DDL vs GT 640
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 835 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.20 | no data |
| Power efficiency | 3.30 | no data |
| Architecture | Kepler (2012−2018) | Curie (2003−2013) |
| GPU code name | GK107 | NV40 |
| Market segment | Desktop | Desktop |
| Release date | 5 June 2012 (13 years ago) | 14 April 2004 (21 years ago) |
| Launch price (MSRP) | $99 | $499 |
Cost-effectiveness evaluation
The higher the ratio, the better. We use the manufacturer's recommended prices.
Performance to price scatter graph
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 | no data |
| Core clock speed | 902 MHz | 350 MHz |
| Number of transistors | 1,270 million | 222 million |
| Manufacturing process technology | 28 nm | 130 nm |
| Power consumption (TDP) | 65 Watt | 80 Watt |
| Texture fill rate | 28.86 | 5.600 |
| Floating-point processing power | 0.6927 TFLOPS | no data |
| ROPs | 16 | 16 |
| TMUs | 32 | 16 |
| L1 Cache | 32 KB | no data |
| L2 Cache | 256 KB | 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).
| Interface | PCIe 3.0 x16 | AGP Pro 8x |
| Length | 145 mm | 305 mm |
| Width | 1-slot | 2-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 | GDDR3 |
| Maximum RAM amount | 2 GB | 256 MB |
| Memory bus width | 128 Bit | 256 Bit |
| Memory clock speed | 891 MHz | 500 MHz |
| Memory bandwidth | 28.51 GB/s | 32 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 | 1x DVI, 1x HDMI, 1x DisplayPort | 2x DVI |
| HDMI | + | - |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | 9.0c (9_3) |
| Shader Model | 5.1 | 3.0 |
| OpenGL | 4.6 | 2.1 |
| OpenCL | 1.2 | N/A |
| Vulkan | 1.1.126 | N/A |
| CUDA | 3.0 | - |
Pros & cons summary
| Recency | 5 June 2012 | 14 April 2004 |
| Maximum RAM amount | 2 GB | 256 MB |
| Chip lithography | 28 nm | 130 nm |
| Power consumption (TDP) | 65 Watt | 80 Watt |
GT 640 has an age advantage of 8 years, a 700% higher maximum VRAM amount, a 364.3% more advanced lithography process, and 23.1% lower power consumption.
We couldn't decide between GeForce GT 640 and GeForce 6800 GT DDL. We've got no test results to judge.
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