it was true until microsoft decided to remove directsound hardware acceleration since win vista.
now basically all games use their own soundengine which will be processed by the CPU.

so no, you won't gain fps by buying a dedicated soundcard.

no games will start to use ASIO now its been posted on here, instead of the old openAL

pardon?

Would you notice a 3-5 FPS increase in BF4?
No, so who cares.

For improved CPU performance, buy a new CPU.

CPU performance is not related to a CPU being new or not.

Ouch GG!

Do you have to be that obnoxious? It's obvious.

obviously will know the difference between a i5 core duo and a 8 core AMD FX if the game or program uses threads

1 core for sound
1 core for particle fx
1 core for liquid
1 core textures

4 cores for everything else ontop 3000 cuda cores