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.
If it's a quality one, yes. I ran a 7970 overclocked with an overclocked i5-4670K on a CX430, 2x Samsung 830 SSD's and a blu ray drive. 5 120MM fans. No issues.
You'll be fine with a good name brand/well built unit. I have a Mini-ITX gaming rig hooked up to my tv. It's equipped with a 450W Silverstone SFX power supply. Inside is an i5-3470, GTX 670, 3.5" HDD, SSD, BD-burner, and cooled using a 140mm Air Penetrator fan and a Corsair H60i AIO cooler. No problems/instability from power that i've noticed.