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.
The answer is yes but this still belongs in the VGA forum as it's 75% VGA and 25% PSU inquiry. Not to mention you're more likely to run into people that know power draw of video cards in the VGA forum than here.
Considering a roughly state of the ART pc barely draws 500w I think your mid - high end PC would be somewhere in the 250 - 300w range. Including a GTX 275 or HD 4890.