Artifacts on low buffer size with Apollo Twin

Hi,

I have Cubase Artist 8.0.40 with the following computer specs:

Windows 10 Pro 64 bits
Intel Core i7 4.00 GHz
32 GB of ram

And I’m using the UAD Apollo Twin Duo as my audio interface. I would say that is a pretty good PC, but at lower sample rates like 256 and less, there are artifacts and skips in the playback. I thought that was due to lack of memory and processor, but the Apollo Twin is suppose to handle all the processing no? When I look at the Apollo Twin console, it says it’s only using 17% and my Cubase instance is only using 11-15%.

Any idea what the problem could be? I don’t know if this is more related to the audio interface or Cubase. I will say that I had the same issues with my older soundcard (M-Audio Profire), but thought the new interface would solve this.

Does the problem occur at a buffer of 128 in a new Empty project without any plugins?

We recommend this video regarding CPU performance: https://www.youtube.com/watch?v=GUsLLEkswzE