I need help!!!!

Probably not. For a 3 way GPU configuration of any kind, you'll probably need a reliable 1000w+ PSU. But the exact psu wattage needed will depend on your system configuration and which exact MSI Twin Frozer II's you're getting. If you could post your system specs, I (and others) could probably give you a fairly good estimate on what psu you'll need.

If you had a very good 850w yes you could such as one that's rated for 850w but actually can do 970w for example.