ive never heard of zumax, and just did some research. Zumax seems to have its own PSU's which reviewed quite well, BUT, there is an epower zumax, which is another brand all together based on Topower. All this is very confising. Topower are cheaper PSU's where I come from. Im confused.... all 3 brands seem to be the same thing http://www.topower.com/product/zumax.htm. Then I found Topower make PSU's for BFG, OCZ, mushkin also. Anyone care to shed some light on this??