Apologies in advance if this is not the correct Forum for this.
 
Normal operation

 
What my computer does

Quick note: These are edited pictures off the EVGA site and not actual screen shots I'm at work :P they do however accurately reflect what my precision screen looks like.
 
 
I've attached two pictures to this post I've noticed while playing pretty much any game my PC will experience what i can only describe as a graphical lag. (screen stops moving but i can still hear everything going on)
 
When i have the Precision X window open under the monitoring section i noticed that when ever this graphical lag happens my power, % drops from around 99, to about 39 for roughly 1- 3 seconds and then normal game play resumes back at 99%
 
I originally though this issue was due to my card being old i was using a GTX 300 Series and upgraded to a GTX 660 ti 2gb Superclock from EVGA (in January)
 
The issue persisted and i ended up just dealing with it.
 
My question is does the power % indicate the Card is losing power? or could something else be causing the issue?
 
I'm running a i7 920 but my CPU usage never seems to go beyond 50%, my memory usage however seems to be somewhere around 90 - 95% in use running on 6 gb total
 
 
 
 
 

bdary
Try setting your "Power Target" up to it's max.  There is no harm doing this.  All you're doing by increasing it from 100% to it's max, or anywhere in between, is basically allowing your card to use more power before it throttles down.  Right now, when you hit or exceed the 100% threshold, your card will throttle down until the power is back down under 100%.
 
Try that and see if it resolves or improves your issue.

I actually have tweaked my settings in an attempt to do that my power target is currently set to max with the GPU clock set to 17 and memory clock set to 200 (still working on finding the most optimal settings for memory)

Try this.  Close and uninstall PrecX making sure to answer NO when asked to save profiles and data etc... Then Reboot!  Don't skip this reboot.  Now follow this link to DDU >>  http://www.guru3d.com/files_details/display_driver_uninstaller_download.html
 
Read through and follow the instructions exactly.  (safe mode)
 
When all done, go to Nvidia's site  >>  http://www.geforce.com/drivers
Enter your GPU model and OS.  Download and save the driver of your choice to your desktop.
 
Then run the installer.  Use "custom" mode install.  ONLY select the graphics and PhysX components.  Uncheck eveything else.  Put a check mark in the "Clean" install box.
 
Then go to EVGA's site and get the latest version of PrecX and install it.