NVIDIA launches GeForce GTX 980M and GTX 970M | VideoCardz.com
graphics card - How do I understand the memory of GTX980M, 4GB or 8GB? - Super User
NVIDIA GeForce GTX 980 Arrives on Gaming Laptops - 35% Faster Than GTX 980M, Full Overclocking Support
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GTX 980M benchmarked: testing Nvidia's mobile performance claims | PC Gamer