PSU Recommendation for Three different GPU Configuration

[gohigh]

Hello,

May I ask you for your suggestions for these 3 configurations:

1. May I know is this PSU: Corsair VS 450 is enough for this configuration:
Ryzen 1800X (OC to 3.8)
Corsair Vengeance LPX 16 GB Ram
Mobo: GA AX370 Gaming - 5
GPU: GTX 730

But we don't play games on this rig, only use it for work purpose. Currently the rig works fine but wondering is this PSU is enough?



2. If I use one GTX 1080 Ti in below configuration then how much wattage PSU is required:
Ryzen 1800X (OC to 3.8)
Corsair Vengeance LPX 16 GB Ram
Mobo: GA AX370 Gaming - 5
GPU: GTX 730


3. If I use two GTX 1080 Ti cards in below configuration then how much wattage PSU is required:
Ryzen 1800X (OC to 3.8)
Corsair Vengeance LPX 16 GB Ram
Mobo: GA AX370 Gaming - 5


How much UPS VA are required for these configuration. I have already one UPS of 600 VA and the other is 1000 VA, please let me know can I use any of them with these kind of configuration?


Thanks for reading it

P.S. My partner signed up this account but she realized that she can't ask a question as isn't technical so I decided to keep this account and tried to change her email with mine in Settings but I didn't receive an verification email on my emailid whereas when she logins in to her email-account she gets the email. Any advise how to change email with mine.

 

[CountMike]

https://outervision.com/power-supply-calculator
http://www.coolermaster.com/power-supply-calculator/
https://seasonic.com/wattage-calculator

 

[gohigh]

If the PSU is 750w then how much UPS VA are required?

If the PSU is 1000w then how much UPS VA are required?

If the PSU is 1200w then how much UPS VA are required, is 600VA is enough?

 

[CountMike]

About double unless you want extended off grid usage.