I sugested you check and see if your PCI bus speed was at spec, you asked how, I told you to to look in Sisoft Sandra for bus speeds.
I'm giving up my time trying to help you, not wasting your time.
Creative isn't making any sense. There is no such thing as an "IRQ file". Just tell them you tried "updating the IRQ files" and it didn't work, and you want a new card & remote.
*Dual PIII-800 @900 i440BX and Tualeron 1.2 @1.7 i815*