Thinking of getting second gpu

[Josiah c-e]

So i was thinking of getting a second gpu and i currently have an R9 270x. I have 600w psu (is this not enough?) and my mobo supports crossfire. However i checked http://support.amd.com/en-us/kb-articles/Pages/Crossfire-Chart.aspx and it says you can only have 2 r9 270x if it is the primary gpu but if the r9 270 is the primary gpu you can have an r9 270x
I wondered if i bought the 270 and put it as my primary gpu and then put the 270x in second this would work.
Thanks, J

 

[FrancisQ]

I belive you can use a r9 270, and a r9 270x together. Altough you should set the 270x as the primary as the chart displays it as the primary GPU. You could also simply use two 270x's.