I have been running TrainerRoad toegether with Rouvy for more than a year with no problems. My configuration is as follows:
Desktop PC with Windows 10 running both Apps
To enable me to simultaneously use the Smart Trainer with Ant+ in both TR and Rouvy I have inserted two garmin USB Ant+ Sticks - Garmin part Number: 010-01058-00.
Important is that in Rouvy “Controllable” under Sensors is not connected with any device. In my setup only “Smart Trainer”, “Heart Rate” and “Cadence” are connected.
Performance problems are rarely associated with the processor itself but the memory. I am running 32 Gb so for me there is no problem. Running both apps together requires at startup around 1,5 Gb of memory which will likely increase during activity. A machine with only 4Gb will probably struggle, so 8Gb should be sufficient, which is a cheap upgrade.
Btw. If you continue riding in Rouvy after TR has finished you can call up the sensors while riding and connect your Smart Trainer to “Controllable”. Just don’t forget to disconnect it when finished.
Hope this helps.