gm45 chipset

Hi friends, My notebook's model is sony vaio vgn-fw260 and mainboard's chipset is GM45. In intel datasheet it emphasizes GM45 supports both DDR2 and DDR3. So i purchased DDR3 type RAM to upgrade. But i realized pin configuration of DDR2 and DDR3 not same, so couldnt utilize DDR3. Is there any...

I only play downloaded games, and activate them through the original codes that i keep saved up. and the fact is some of the current games are MASSIVE! indeed and take a bit long to download from Steam or Origins alike. So will i damage my pc if i keep it on for like 2 days straight in a row ...