You mean assimilate LoL.....................
Downloading new drivers is a good idea, also try tweaking the settings a bit......
Or Gotto control panel - multimedia - advanced properties - performance, then switch hardware acceleration to FULL and set sample rate conversion quality to Best. That should improve performance a tiny bit
P.....
If none of that works then you have to switch the resolution and graphics down a bit.............
The extreme case would be to get a PCI sound card or an upgrade LoL...
I don't think onboard sound cards have hardware mode???? They are all software driven right??? soooooooo a lot of strain on CPU????......