Switching out onboard sound for dedicated sound card

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Hi all, has anyone with a Butkicker V2 and Andre's softwear ever switch out from the their M/B on-board sound to a dedicated sound card like the Creative PCI-E Audigy Fx 5.1 ??, if so did you find the Buttkicker was better with the dedicated sound car or is their no difference from on-board sound cards ??

Cheers Stephen