Nvidia Corporation posted a second quarter net profit of $26 million, down 79% from $128 million in Q2 of last year, on turnover which was flat year on year at $1.1 billion. Net profit in the first six months of the year fell 39% to $160 million from $265 million a year earlier, while turnover improved slightly to $2.3 billion from $2.2 billion in the first half of last year.