I just recently built a new computer, an I5 750, P55 gigabyte motherboard with 4 gig of DDR3 ram and ATI 5770 GPU. Is worth upgrading to 8 gigs? I run Windows 7 Professional. Will I notice any increase in speeed if I move up to 8 gigs? I currently use my computer to play games and encode movies for my ipod. Thanks.
probably not, 4GB is plenty for a while, i wouldn't worry about it
You generally won't get any increase in gaming, especially with 32-bit games. If you are simultaneously using multiple apps that require alot of memory then you would notice some improvement as the OS would be using the page file less.