NVIDIA GeForce GT 640M, codenamed “N13P-GS”, is a mid-range graphics chip, announced in early Q2 of 2012. It is part of the Kepler generation and relies on a GK107 core, constructed through a 28nm process by TSMC (Taiwan Semiconductor Manufacturing Company). It consists of two shader blocks, known as SMX, and each of those has 192 smaller shader cores, also known as CUDA, for a total of 384 CUDA cores.
All of them operate at a base 625MHz, but the Turbo Mode functionality can increase that to 645MHz, based on the laptop’s cooling capacity.
The chip also has a 128bit bus and is available in several models with either DDR3 or GDDR5 memory. NVIDIA GeForce GT 640M supports DirectX 11.1, Pixel Shader 5.0, Optimus, PhysX, OpenCL, OpenGL 4.1, DirectCompute, CUDA, 3DTV Play and 3D Vision. Memory bandwidth goes up to 64GB/sec. Max resolutions (WxH) are 3840×2160 digital and 2048×1536 analog.
You can find all available laptops with GeForce GT 640M here:
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Laptops with NVIDIA GeForce GT 640M (1GB GDDR5)
NVIDIA GeForce GT 640M (1GB GDDR5) - benchmark tests
NVIDIA GeForce GT 640M (1GB GDDR5) vs competitors:
| # | GPU | 3DM Fire Strike (G) |
Performance Difference |
In laptops starting at... | Price Difference |
|---|---|---|---|---|---|
| 200. | NVIDIA GeForce GT 740M (2GB DDR3, 128-bit) | 1382 |  1% |
N/A | - |
| 201. | AMD Radeon HD 8750M (1GB DDR3) | 1365 | 0% | N/A | - |
| 202. | NVIDIA GeForce GT 640M (1GB GDDR5) | 1362 | 0% | N/A | - |
| 203. | NVIDIA Quadro K1100M (2GB GDDR5) | 1362 | 2% |
N/A | - |
| 204. | AMD Radeon HD 8750M (2GB DDR3) | 1341 | 1% |
N/A | - |
| 205. | NVIDIA GeForce GT 730M (2GB DDR3) | 1333 | - | N/A | - |
NVIDIA GeForce GT 640M (1GB GDDR5) - gaming tests
We’ve tested NVIDIA GeForce GT 640M (1GB GDDR5) on…
| # | Laptop series | 3DMark Fire Strike (G) | Unigine Heaven 3.0 | Unigine Heaven 4.0 | Unigine Superposition | Price |
|---|---|---|---|---|---|---|
| 1. | Samsung Series 7 Chronos (NP700) | 1362.00 | 521.00 | 0.00 | 0.00 | N/A |