I have the Creative Sound Blaster X-FI Xtreme Audio 24BIT Sound Card 7.1 PCI-E X1 OEM. Is that what you are meaning? It fits in the x1 slot on the motherboard. I'm not much of an audiophile, I just bought it so I could save a regular pci slot for a dvb-s card. I haven't seen any cards other than the above mentioned that will fit in those tiny slots.