Textures Messing Up

Hi, I recently built a new computer and wanted to know why my textures are somtimes either missing or there are black spots in the world. For example when I hold a rock sometimes half the rock will be missing. I havent seen anyone else have this issue and i know its not my graphics card since this never happened on my old computer. My CPU is an AMD FX-8350 if that helps. I am also using google chrome and tried internet explorer to encounter the same problem. Thanks in advance!