Lag spikes on a fine PC

[kinkinkijkin]

Have you enforced high performance in windows? Did you check catalyst and make sure there was no room below the max power for throttling?

Also, try locking dolphin to certain cores. I don't know if there's an option for it in dolphin, but you can do it in windows by disabling cores you don't want dolphin to switch to. (windows cycles threads between all cores, and that has a small chance to cause slowdown issues on a more stressed CPU)

Also, try DirectAudio instead of XAudio. I know that differences between the two have caused me issue personally, so it might be so for you as well.