GeForce 8800 GTS 640 vs GTX 950
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in performance ranking | 353 | not rated |
| Place by popularity | 94 | not in top-100 |
| Cost-effectiveness evaluation | 6.03 | no data |
| Architecture | Maxwell (2014−2018) | Tesla (2006−2010) |
| GPU code name | GM206 | G80 |
| Market segment | Desktop | Desktop |
| Release date | 20 August 2015 (8 years ago) | 8 November 2006 (17 years ago) |
| Launch price (MSRP) | $159 | $449 |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
Detailed specifications
General performance parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. These parameters indirectly speak of performance, but for precise assessment you have to consider their benchmark and gaming test results. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 768 | 96 |
| Core clock speed | 1024 MHz | 513 MHz |
| Boost clock speed | 1188 MHz | no data |
| Number of transistors | 2,940 million | 681 million |
| Manufacturing process technology | 28 nm | 90 nm |
| Power consumption (TDP) | 90 Watt | 143 Watt |
| Texture fill rate | 57.02 | 24.62 |
| Floating-point performance | 1,825 gflops | 228.1 gflops |
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 1.0 x16 |
| Length | 202 mm | 267 mm |
| Width | 2-slot | 2-slot |
| Supplementary power connectors | 1x 6-pin | 1x 6-pin |
| SLI options | + | no data |
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 | GDDR5 | GDDR3 |
| Maximum RAM amount | 2 GB | 640 MB |
| Memory bus width | 128 Bit | 320 Bit |
| Memory clock speed | 3300 MHz | 1584 MHz |
| Memory bandwidth | 105.8 GB/s | 63.36 GB/s |
| Shared memory | - | no data |
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, 3x DisplayPort | 2x DVI, 1x S-Video |
| HDMI | + | no data |
| G-SYNC support | + | no data |
API compatibility
List of supported graphics and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (12_1) | 11.1 (10_0) |
| Shader Model | 6.4 | 4.0 |
| OpenGL | 4.6 | 3.3 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | 1.1.126 | N/A |
| CUDA | + | + |
Pros & cons summary
| Recency | 20 August 2015 | 8 November 2006 |
| Maximum RAM amount | 2 GB | 640 MB |
| Chip lithography | 28 nm | 90 nm |
| Power consumption (TDP) | 90 Watt | 143 Watt |
GTX 950 has an age advantage of 8 years, a 220% higher maximum VRAM amount, a 221.4% more advanced lithography process, and 58.9% lower power consumption.
We couldn't decide between GeForce GTX 950 and GeForce 8800 GTS 640. We've got no test results to judge.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
