[JCBigler]

So you are recording 24 channels into Protools at 192kHz. And routing all 24 of those channels back to your console so live mixing and monitoring? With no plugins?

What buffer setting are you using?

I've recorded 64 channels into Protools with an HDX card and it hardly used any of the mixer DSP. But I was running at 48kHx and a buffer at 1024 samples. If you are trying to run a buffer at 64 or 32, so you can play drums along with it, then I think it's going to eat up a ton of DSP resources, especially at 192kHz.

What is your actual signal chain? And what are the computer specs that you're using?