Margins were also held down by $57 million in charges related to its previous generations of chips following the sharp fall-off in cryptocurrency mining ...
source https://www.google.com/url?rct=j&sa=t&url=https://www.nasdaq.com/article/nvidia-shares-slide-17-pct-as-cryptocurrency-demand-vanishes-20181115-01439&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNEKgVXN6Lg8cT9KeQP_shYbQARI8w
