Hi,
1. RTX will work but only on RTX 3090, obviously. Yes Studio driver supports also Pascal GTX 10X0 GPUs.
Please note that, when you use 1070+3090 together for rendering, the available VRAM is limited at max 8GB of GTX 1070. To be able to render with 24GB, you need to disable GTX 1070. Probably better to use it only for monitor + AI denoiser.
2. You need to visit your personal Octanelive page, and if the licenses are listed in blue as Active, deactivate them by pressing the red Unlock button beside of both licenses, Standalone and plugin:
for Commercial licensesfor Subscription licenses3. You need c4doctane 2020.2.3-R2 or greater, to have the first support to new C4D S24 version, now we are at 2020.2.3-R3:
viewtopic.php?f=85&t=77426ciao Beppe