Putting the thing on highest resolution can make your game play bad on some games.Also running ceratin backgounds and playing games can conflict a moving background needs more resorces to run.You proberly not got enough power or resources to run games and moving or high res backgrounds.
Try just using an XP windows background.
In NVIDIA contraol panel you can set diffrentt settings for diffrent games.
What is your power supply?
I would say matching sticks of
RAM.how much of your
RAM have you dedicated to your GPU?
2 gig
RAM would be much better.
What are the settings in BIOS/Setup for your
RAM/GPU/
CPU?
Have you changed settings thinking they would speed up your game play?When infact they causing games to lag and your computer to heatup?.
I would set your BIOS/Setup back to defaults and read the manual properly on what settings you should be using?
What is your virtual memory set at?
I think this is a combination of incorrect settings in BIOS/nvidia control panel/
RAM lack of or wrong settings in BIOS/hardware proberly due to again wrong settings.
Maybe cooling is also not set right.
Also what other program,s are running in the background to reduce speed and functuality?What software do you have installed?
You know that box when setting res?The one thats says do not display settings my monitor cannot support?Check it.