Questions: (& excuse if this has been addressed previously and I can't find on the forum

(a) Will the 32 bit PCI cards still work in 64 bit environment (I've never tried it) and if so any issues to negotiate?
(b) Which OS better option - Windows 10 or Windows 7? Or is this determined by Scope version? I'm currently on 5.1. All it will need to do is host Cubase/Ableton & Scope, and will be off the grid.
(c) Upgrade is purely to achieve better native DAW/ASIO performance/headroom. Any comments on what aspects of tech spec (cpu/cores, RAM, motherboard architecture??) to prioritise to best maximise this and/or what is arguably overkill/unnecessary. My layman understanding is that the later the OS the more resource/hardware it requires to run so my logic is a higher spec'd machine running an earlier OS (requiring default less) will have better performance/resource? Or am I wrong here? What I'm getting at is it for example a stupid idea to upgrade motherboard/cpu etc and then limit it to a 32 bit Windows 7 os with only 4GIG RAM?
Any comments/wisdom in this regard would be greatly appreciated
Cheers/thanks PD
