Graphics issues

[tommy.bus]

See attached pics....Has anyone experienced this issue before?  I've had this computer and software set up for over a year and have not had this problem until a couple days ago.  No changes to the system as far as I know.  I'm assuming it's the video card...Basically, when I pan around the model starts to look like this.  It's hard to explain but if I move the object, the spots that are blacked out don't stay in the same place, it changes.  For these pics, I took a snip for the first one, then panned over slightly and took another snip to show the difference.  If I restart the system, it's mostly better but eventually starts again.  Thanks in advance.

[tommy.bus]

Something else I just noticed, when the model looks like this, if I do a zoom - window command, everything looks correct again.  Then when I pan, it goes back to being messed up.  Regen-all does nothing for it.  

I guess I was wrong about never having this issue.  I was looking through my previous posts and found one from a couple months ago with a similar issue.  Unfortunately, the fix I used last time that corrected the problem (Manual tune, reset to recommended values) is not fixing it time.

[tommy.bus · Accepted solution]

Going into performance tuner and setting Gooch hardware shader to "off" fixed the issue.  Odd that it just decided to start doing it after having no issues for awhile.