what would be the difference of the two? i mean mounting on top and mounting in rear?
It would be a case of room between the top of the case and the motherboard, and as well if the tubes for the cooler would reach around. I personally prefer having a 120mm in the rear because it looks nice and cleaner. Another thing with this cooler is it is supposedly loud, so if it is a bother, you can go to BIOS and turn down the fan speed if you determine it is too loud. If you really want to mount it to the top of the system though, I would suggest a 240mm cooler, like the Corsair H100i cooler. It works great, and keep my i7-3770K at 30 when idle and 45-55 while gaming (current season dependent, give or take 7 degrees)
what would be the difference of the two? i mean mounting on top and mounting in rear?
It would be a case of room between the top of the case and the motherboard, and as well if the tubes for the cooler would reach around. I personally prefer having a 120mm in the rear because it looks nice and cleaner. Another thing with this cooler is it is supposedly loud, so if it is a bother, you can go to BIOS and turn down the fan speed if you determine it is too loud. If you really want to mount it to the top of the system though, I would suggest a 240mm cooler, like the Corsair H100i cooler. It works great, and keep my i7-3770K at 30 when idle and 45-55 while gaming (current season dependent, give or take 7 degrees)
More a question than an answer. I have ordered the same case and cooler. The CM website says the back of the case should exhaust hot air - http://www.coolermaster.com/case/mid-tower-cm690-series/cm693/
Does the cooler not drag cool air into it from the outside? If so then should'nt the rad be installed on the front of the case?
you want the rad blowing out of the case to keep the hot air away from other components. The increased ambient temp in the case slows the heat transfer rates of all other component.newtons law of cooling shows heat transfer rates are proportional to the difference in heat between the 2 mediums(air & heatsink). chipsets vrm's and some video cards don't have fans and can be over heated in this hot environment.