Nvidia has added recently new dedicated laptop video card models to the GeForce 600M line.
Besides the previously released GT 635M, GT 630M, and 610M, which are just rebrands of their respective 500M series 40-nanometer GPUs, Nvidia now also offers the GeForce GTX 675M, GTX 670M, and GTX 660M for gaming laptops, as well as the GT 650M, GT 640M, GT 640M LE, and GT 620M for performance-class systems. The new video cards bring significant upgrade, because of transition from the 40nm to 28nm production process and new “Kepler” architecture. This enables better power efficiency and less heat, allowing higher graphics peformance and longer battery life in laptops with these chips. UPDATE: The GTX 675M and 670M are still 40nm chips. Thanks Jeremy Lee for pointing this out.
Here are specifications of all currently listed 600M GPUs on Nvidia.com:
| GeForce Model | CUDA Cores | Graphics Clock (MHz) |
Texture Fill Rate (billion/sec) |
Memory Interface | Memory Bandwidth (GB/s) |
SLI |
| GTX 675M | 384 | 620 | 39.7 | 256-bit GDDR5 | 96 | Yes, 2-way |
| GTX 670M | 336 | 598 | 33.5 | 192-bit GDDR5 | 72 | |
| GTX 660M | 384 | 835 | 30.4 | 128-bit GDDR5 | 64 | |
| GT 650M | 384 | 850 DDR3 / 735 GDDR5 | up to 27.2 | 128-bit DDR3 / GDDR5 |
up to 64 | No |
| GT 640M | 384 | up to 625 | up to 20 | up to 64 | ||
| GT 640M LE | up to 384 | up to 500 | up to 16 | up to 28.8 | ||
| GT 635M | 144 | up to 675 | up to 16.2 | up to 192-bit DDR3 | up to 43.2 | |
| GT 630M | 96 | up to 800 | up to 12.8 | up to 128-bit, DDR3 / GDDR5 |
up to 32 | |
| GT 620M | 96 | up to 625 | up to 10.0 | up to 128-bit DDR3 | up to 28.8 | |
| 610M | 48 | up to 900 | up to 7.2 | 64-bit DDR3 | up to 14.4 |
Guys over at Hot Hardware have reviewed one of the Kepler cards – the GeForce GT 640M. According to them, the GT 640M is about 20% faster than the corresponding 500M model, the GT 555M. The new GPU also delivers much better power efficiency versus the previous geneneration graphics chip.
This article is misleading. The GTX 675M and GTX 670M are 40nm (Fermi) chips. The 660M is 28nm (Kepler)