Situation: new PC, new motherboard with PCIe slots and "old" Fritz Card PCI. With this interface card, the Fritz Card PCI works beautifully in a PCIe slot. It is very nice that you can unscrew the slot cover at the CSL Card, must therefore be at the Fritz card just a little and carefully (!) Are bent at the slot bracket and everything fits. Windows 8.1 will detect the card, drivers are automatically installed, all external software that accesses the CAPI interface is running. Very nice and very good!