desi_60 :
im using windows 7 ultimate 32bit. i dont how to find PSU And wattage or ram. i have updated all drivers
Thanks for getting back. Your
PSU is inside your case so you will have to open up one side and it should be the left side if you are looking strait at your tower. There should be a sticker on the side of your
Power Supply (PSU).
On the sticker you will see the brand or model # with a lot of numbers. If you could take a picture of it or just write down all the numbers and then list them here. The RAM can be found in System properties.
Click on start menu look for computer and click on it. Almost to the top above drive c you will see some links to click on. The links are
Organize, System Properties, Uninstall or Change Program, Map network Drive, and Open control panel.
Click on
System Properties. That will bring up most of your rig and the RAM will be listed. Are all of your games from Steam? You might try playing your games on the lowest settings as possible and see if it lags.
Also please try what HEXiT has stated. It could be the fix and we won't have to go through all this. There is a Thing that Steam allows you to use and that is to Verify Integrity of Game Cache.
It might help and it might not and in your case having a GTS 250 and playing the newer games of today might not cut it so well. It should not lag on low settings. Are your temps in the norms.
If so what are they and what program are you using to monitor them? Get back to us with answers to the questions and we can go from there. Good luck.
NOTE: When in Steam, left click on Games. Then left click on view Games Library. Right click on the Game. Then left click on properties. Then left click on local files. Then left click on Verify Integrity of Game Cache.