Raytracing support - hardware question

Hi guys
Don’t see a hardware channel so thought I’d ask here.
I have twin Titan Volta GPU’s gathering dust on an idle PC and am wondering about raytracing.
After some googling get mixed results.
Will I be able to enable raytracing in UE4 on this PC?
And if so does Unreal benefit from multiple GPUs?

Thanks in advance for any feedback.