There really isn't any issue. I would just rather have a quiet case at the expense of warmer temperatures (though when I do upgrade to water cooling, I have the choice to have both quiet and cold temps, but at the expense of a paycheck). I have isolated any noise "issues" to the PSU and the vc-re on my chipset. Since the chipset has very few upgrade options (if you know of any, please tell me!!) I have settled on leaving it where it is. The PSU, however, creates a very audible sound, and its fan is the sole creator of the 'tone' of my case. when cold booting and the PSU fan is at a minimum, my case is so silent I can hear the AC kick on in the house; I would like to keep that kind of silence even when my computer is warm and at idle which is not an option with my current PSU.
The main reason for upgrading to the RC-690 is to have a smaller, tighter case. This will help me have less standing air inside the case as well as use all drive bays as opposed to only using 2 of the 4 CD bays and 3 of the 6 HDD bays in my P180. This does decrease the expandability of my computer; but considering it can hold 5TB of HDD with todays top-of-the-line HDs, and I don't think I will ever need 5CD drives, I'm okay. Last note, since the HDDs are mounted perpendicular to the front of the case, my HD cables won't be mashed up against my GPU power cable and the perpendicular mounting of the cage widens the entire case itself, giving me more room to maneuver the cables I will have.
By the way, for angry: I used the DIY-Street link to SVC when I bought the case. expect a few nickels headed your way

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