Clics dans l'audio avec une powercore 6000

Le PCI Express x1 surpasse également l'interface PCI classique grâce à sa largeur de bande exceptionnelle allant jusqu'à 500MB/s. L'interface haute vitesse du PCI Express permettra égalament de nouvelles utilisations sur les PC de bureau, comme le Gigabit LAN, 1394b, et les systèmes RAID..

I suspect the RME digiface does not correctly set the PCI latency for the PCI chipset. In that case any heavy load on the same PCI bus will prevent the device from getting enough streaming data.

Try the device in another PCI slot, if you are using a PCI firewire controller also try this in another slot. Chances are the mainboard uses separate PCI busses for some of the PCI slots.
If that doesn't help get a tool to set/display the PCI latency. Some mainboards offer an option to set this. You don't need to find the correct value. More the range of the value. Usually something like 8 vs. 40 vs. 240.

Have you contacted RME?

Potentially, PCI and PCIe could share the same bus. This depends on the mainboard.
But ask RME, if its due to an PCI latency / load issue they should have reports about this, since its not specific to PowerCore but to all devices (i.e. harddrives on a PCI(e) controller) which can put a heavy load on the bus.

I currently can't recommend any PCI latency tools, as there weren't any need for us recently. But we have used such tools in the beginning of the PowerCore development to find and set the correct values. Google for "pci latency tool".