Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
There are a few calculators on the web, but most of them suck. All you can really do is look up the draw for your major components add them up, and add a bit for "misc".
CPU power specs can be gotten from AMD & Intel's web sites. Ditto for hard drives. For Optical drives this may work as well depending on who made it. I've also seen power specs printed on drives sometimes. Video cards take a bit more work, but you should be able to find the info at least if it is/was a high end one. Fans normally have thier power draw in amps printed on them.
Or you can just post your specs & we'll guess what you need.