Black graphical errors appearing on textures

Basically theres this black sort of texture appearing under textures for models, etc. And they clip through the textures from time to time, creating this annoying graphical error, And i can’t really seem to find a solution for it.

Here’s what it looks like.

well, if it isn’t something to do with camera frustum / clipping (object to close or too far away from the camera)…

perhaps your video card is overclocked and over-heating…?