The difference between the FCA and FMA units can be seen in these two pictures.
<A HREF="http://65.119.30.151/productimage/17-103-419-04.JPG" target="_new">FCA</A>
<A HREF="http://65.119.30.151/productimage/17-103-416-04.JPG" target="_new">FMA</A>
Besides fan placement, in which the FCA seems to be better, there is a difference in minimum output as well as operating frequency. Read the specs to see.
<A HREF="http://www.enermax.com.tw/products/eg-365axve-fca.htm" target="_new">FCA Operating Specs</A>
<A HREF="http://www.enermax.com.tw/products/eg-365axve-fma.htm" target="_new">FMA Operating Specs</A>
Frankly I don't know why they made two different PSU's. These are the only differences I can see and based on what I know the FCA version looks much better, especially since its bottom fan is placed better.
<A HREF="http://65.119.30.151/productimage/17-103-419-04.JPG" target="_new">FCA</A>
<A HREF="http://65.119.30.151/productimage/17-103-416-04.JPG" target="_new">FMA</A>
Besides fan placement, in which the FCA seems to be better, there is a difference in minimum output as well as operating frequency. Read the specs to see.
<A HREF="http://www.enermax.com.tw/products/eg-365axve-fca.htm" target="_new">FCA Operating Specs</A>
<A HREF="http://www.enermax.com.tw/products/eg-365axve-fma.htm" target="_new">FMA Operating Specs</A>
Frankly I don't know why they made two different PSU's. These are the only differences I can see and based on what I know the FCA version looks much better, especially since its bottom fan is placed better.