Archief - Nvidia GTX-560 vs ATI HD6990

Functionally, they are essentially the same thing, scaled down due to the power requirements of desktop parts; a high end desktop video card can need more than 300w, and that is hard to power and even harder to cool in a laptop.

As far as what "equivalent" laptop GPUs have in them as opposed to desktop GPUs, they generally acheive approximately half the performance level of the equivalent desktop part. As you move towards the low end in desktop cards, the curve flattens a bit as low end desktop cards aren't really intended for gaming.


GeForce GTX 560: 336 shader units, 64 geometry shaders, 32 pixel shaders, runs at 810Mhz, with 2Ghz 256 bit GDDR5 memory

GeForce GTX 560M: 192 shader units, 32 geometry shaders, 24 pixel shaders, runs at 775Mhz, 1.25Ghz 192 bit GDDR5 memory

Here, the desktop part can perform more calculations per clock cycle, output more pixels per clock cycle, runs at a higher clock speed in addition to this, and has memory that runs at a higher clock speed on a wider memory bus. The desktop part is going to be around twice as fast as the laptop model.

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The AMD Mobility Radeon HD 6990M (or sometimes called ATI Mobility Radeon HD 6990) is a high-end graphics card for big laptops (17" and up). It is based on the desktop HD 6870 graphics card with slower clock rates and therefore features the new UVD3 video processor and Eyefinity+.

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