Good day, everyone I am a newbie to this forum. Please read carefully. The case i am talking has happened since months ago, I've searched all over the net for stuff on how to fix this and looks like the topics from other forums i heard was never helpful to me in fixing it. The games i played in my PC are usually full screen, usually at least 1 GB in size and uses that much memory on my VCard. As said in the thread title, random lag, i mean that the game runs fine at first , lags for a number of seconds, then goes back fine, then vice versa. For example, i am playing CoD:MW2, i play a mission, it runs fine (around 40-60 fps, the lesser the details the higher, obviously) a few seconds later (10-15, but i cannot tell exactly when it will occur around), it drops to 20-30 fps then goes back to 40-60 then vice versa. (notes: i play CoD:MW2 at low/normal (or medium) settings, i choose it manually, no background app running (even those in the notification area @ the bottom-right corner of the screen) before i ran the game) now i will post the specs of my system w/c is really necessary. Pentium D 820 2.8 GHz Windows 7 32-bit Kingston 2 GB RAM (1 stick only) Powercolor Radeon X1650 512 MB DDR2 Seagate 160GB 425 W PSU Asus P5KPL-AM these are 2 things i tried: running gpu-z , free ram optimizer at the background (but sometimes freezes which let me force to end the app's process, or worse, crashes) cleaning hardware (the card might be too hot, so i decided to brush the dust in it) hope of your kind consideration. i would be greatly appreciated if i found something that fixes it.