Hello, I have recently (yesterday) bought an XFX AMD radeon R9 270X graphics card which is written as " r9-270x-cdj4" model. I saw their official web site and realized that XFX provides so many R9 270x models like cdfc, cdj4, cdjc etc. My question is.....are these models different from each other????? Game-Debate said that XFX R9 270X has merely 185.5 GBPS bandwidth........will this...so called cdj4 edition of R9 270x provide me the best performance??? (also written that it was made in china!?)