here is a review of the gtx 550 ti....you can determine for yourself if it is good enough for gaming
what do you mean by psu-??? tell?? do you want us to tell you what psu to buy for a 550 ti....also you need to tell us what resolution you plan on playing bf3 on
That depends on resolution.. In 720p, yes you would play on high settings.. But when it comes to 1080p it won't.. 550ti requires 400W PSU with 24A on 12V rail.. Tell your budget for both GPU and PSU then we can give you a better answer..