I've never had issues with nzxt. Sometimes you get lemons. Have you downloaded the rgb software for the kraken? Is your USB cable for the LED's messed up in any way? Have you attempted to clean the dust? Just some trouble shooting steps I'd take to check. A voltage meter is a great idea too. A led will flicker when to low of power. I know from cars I had a dim switch hooked to non dimmable led strip for interior lighting and they strobed like crazy when voltage was limited.