NVIDIA GeForce GTX 780M SLI vs NVIDIA GeForce GT 640 Rev. 2
Comparative analysis of NVIDIA GeForce GTX 780M SLI and NVIDIA GeForce GT 640 Rev. 2 videocards for all known characteristics in the following categories: Essentials, Technical info, Compatibility, dimensions and requirements, API support, Memory, Video outputs and ports. Benchmark videocards performance analysis: CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Fps).
Differences
Reasons to consider the NVIDIA GeForce GTX 780M SLI
- 8x more pipelines: 3072 vs 384
- 8x more maximum memory size: 2x 4 GB vs 1 GB
| Pipelines | 3072 vs 384 |
| Maximum memory size | 2x 4 GB vs 1 GB |
Reasons to consider the NVIDIA GeForce GT 640 Rev. 2
- Around 27% higher core clock speed: 1046 MHz vs 823 MHz
- 4.1x lower typical power consumption: 49 Watt vs 200 Watt
| Core clock speed | 1046 MHz vs 823 MHz |
| Thermal Design Power (TDP) | 49 Watt vs 200 Watt |
| Memory clock speed | 5008 MHz vs 5000 MHz |
Compare benchmarks
GPU 1: NVIDIA GeForce GTX 780M SLI
GPU 2: NVIDIA GeForce GT 640 Rev. 2
| Name | NVIDIA GeForce GTX 780M SLI | NVIDIA GeForce GT 640 Rev. 2 |
|---|---|---|
| CompuBench 1.5 Desktop - Face Detection (mPixels/s) | 10.475 | |
| CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s) | 173.537 | |
| CompuBench 1.5 Desktop - T-Rex (Frames/s) | 0.032 | |
| CompuBench 1.5 Desktop - Video Composition (Frames/s) | 8.717 | |
| CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s) | 10.454 | |
| GFXBench 4.0 - Car Chase Offscreen (Frames) | 2309 | |
| GFXBench 4.0 - Manhattan (Frames) | 3354 | |
| GFXBench 4.0 - T-Rex (Frames) | 3220 | |
| GFXBench 4.0 - Car Chase Offscreen (Fps) | 2309 | |
| GFXBench 4.0 - Manhattan (Fps) | 3354 | |
| GFXBench 4.0 - T-Rex (Fps) | 3220 |
Compare specifications (specs)
| NVIDIA GeForce GTX 780M SLI | NVIDIA GeForce GT 640 Rev. 2 | |
|---|---|---|
Essentials |
||
| Architecture | Kepler | Kepler 2.0 |
| Code name | N14E-GTX | GK208 |
| Launch date | 30 May 2013 | 29 May 2013 |
| Place in performance rating | not rated | 1275 |
| Type | Laptop | Desktop |
| Launch price (MSRP) | $89 | |
Technical info |
||
| Core clock speed | 823 MHz | 1046 MHz |
| Manufacturing process technology | 28 nm | 28 nm |
| Pipelines | 3072 | 384 |
| Thermal Design Power (TDP) | 200 Watt | 49 Watt |
| Transistor count | 7080 Million | |
| Floating-point performance | 803.3 gflops | |
| Texture fill rate | 16.74 GTexel / s | |
Compatibility, dimensions and requirements |
||
| Laptop size | large | |
| Interface | PCIe 2.0 x8 | |
| Length | 145 mm | |
| Supplementary power connectors | None | |
API support |
||
| DirectX | 11 | 12.0 (11_0) |
| OpenGL | 4.6 | |
Memory |
||
| Maximum RAM amount | 2x 4 GB | 1 GB |
| Memory bus width | 2x 256 Bit | 64 Bit |
| Memory clock speed | 5000 MHz | 5008 MHz |
| Memory type | GDDR5 | GDDR5 |
| Shared memory | 0 | |
| Memory bandwidth | 40.06 GB / s | |
Video outputs and ports |
||
| Display Connectors | 1x DVI, 1x HDMI, 1x VGA | |
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NVIDIAGeForce GTX 780M SLI vs
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