I found it surprising how turning sound on, killed 80% frame rate.Any netbook with an intel atom dual core and ION GPU is capable of running any new games, but those netbooks can cost a nice fund. I have been able to run LoL on a Asus 1005PE dual core atom 2GB with sound off at 30 FPS, with sound on 5FPS.
Just buy a real computer or laptop
This is a comment I found. I'm not sure what your full specs are though.
Any netbooks capable of running LoL?
I found it surprising how turning sound on, killed 80% frame rate.