Possible conflict between External Audio Interface and Video card?

[roger26]

My computer is 1 week old and custom built with the following:
Windows 7 Home Premium Service Pack 1, 6.1, build: 7601 (x64)
Motherboard ASUS M5A99X EVO R2.0
AMD FX(tm)-9590 Eight-Core Processor
Radeon R9 270 OC 975Mhz GDDR5 PCI-E
RAM: 16GB
I've tried 3 sound cards so far: The Focusrite 2i2, Presonus Firestudio, and the UR22.
None have worked properly. My graphics card works well without an external sound card and the on-board audio is also fine.
I'm using my computer for professional audio and video editing (the reason for the pro cards) however, when I plug in an external sound card(usb2 or firewire) both the video and audio malfunction. Pops, clicks, drop outs, hanging.
There is a conflict of some sort between the audio and video cards any idea how to fix this?

Thank you.

 

[dovah-chan]

Do you have the appropriate motherboard (USB and possibly others) and GPU (CCC) drivers installed?

Sounds like a motherboard issue to me really. I might consider resetting the CMOS or performing a BIOS update.

 

[roger26]

Do you have the appropriate motherboard (USB and possibly others) and GPU (CCC) drivers installed?

Sounds like a motherboard issue to me really. I might consider resetting the CMOS or performing a BIOS update.

On a NEW computer? The trouble only started when I attempted to use professional external audio cards