Why is the GPU VRAM different between models and will it make a difference?
Posted by on 15 December 2014 11:27 AM

Some GPUs are available in different laptops with different amounts of VRAM.  One example is the NVIDIA GTX 980M.  It is available in soem laptops with 4Gb of VRAM and some with 8Gb.


This is because some of the chassis use integrated GPUs which have less memory, and some use dedicated GPUs which have more.  Integrated GPUs soldered directly onto the motherboard; this helps to keep the chassis thin.  Discrete GPUs are removeable cards that require a lot more room.


If you are gaming at 1920x1080 then the performance of a 980M will be identical if you have either the 4GB or 8GB version.  It is only when gaming on multiple monitors simultaneously, or gaming at resolutions over 3K that the additional vRAM can come into effect.  However, you will find that the game performance in these two circumstances will be limited by the actual power of the GPU before it is limited by the vRAM.  Therefore it really makes no difference at all whether you have the 4GB or 8GB version of the 980M.

If we were asked whether the P504 with 8GB 980M would give better performance to a P505 with 4GB 980M the answer would be exactly the same! 

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