I have two RME AES32 (one with PCI and one with PCI-e) and i work on PC running WIN 8.1

With Cubase 8.0  and Reaper i have no problems.

On the contrary i have these problems (Only with the older card with PCI or running both the cards )  running PRO TOOLS 12.7.1 :

1. I can't work with sample rate over 48khz

2. I can't work with a buffer size over 1024 samples

I can't solve the problem

Thank you

Davide