LG L7 Slowly, bad performance rooted with ICS v10H

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http://forum.xda-developers.com – Hi people. Recently,i rooted my L7 with ics v10h. I installed CPU Master Free to set cpu maxim and mininum, but still has lag and is very slowly. Aslo, i installed Memory Booster Lite or RAM Optimizer and it's incredible what i saw: Code: Total memory: 409 MB Free Memory: 127 MB Used Memory: 282 MB This is my memory ram. And i don't have any apps on, only necessary for device and android. No game opened. How is possible that Android ICS use more than 250 MB ? Is this possible? Or ICS is a sh*t ? That's why games like Asphalt 5 don't works, got error like: "Unfortunately, Asp (HowTos)