Holy cow! I've heard about heated arguments over video cards but I've never heard of one ending in murder. This page isn't in English so I translated the following quote for you:
In Russia, NVIDIA or
AMD has a bloody battle over. The 31-year-old NVIDIA fan Alexander Trofimov (on the left ) was sentenced to nine and a half years of killing his fan 37-year-old friend Yevgeny Lyulin (right). The event, triggered by high alcohol, took place on 16 September 2016 .