I know many of you water coolers use a rad mounted internally as I do basically installing the rad between the rear exhaust fan and case. The problem with this method is we are trying to cool our coolant with hot exhaust. If your case is similar to mine this is the only exhaust I have besides my PSU so changing the direction of the rad fan to draw in cool air is not an option. I never use my top mounted USB/headphone jacks so I decided to install an exhaust fan in their place. I now have a 120mm fan installed in the top of my case. My before temps were 42/59 idle/load cpu, 39/60 idle/load case. Now with the 120mm top exhaust and my rad fan now changed to pull cool air from outside of my case my temps are now 35/45 idle/load cpu, 28/32 idle/load case! Wow what a difference! That's a whopping 14 deg drop at load for cpu and almost 30 deg drop for my case!! Man I wish i had done this sooner. I was almost going to buy an external dual fan rad but glad I tried this because I'm not wanting to spend any more money on this old rig. Also I've been able to increase my clock speed too! I have my 3400 Prescott running at 3805 with no problems at all, (haven't tried any higher yet). Hope this might help some of you out there. Also if you are like me I try to keep my rig as dust free as possible so I tapped a piece of scarf over the rear intake to catch dust (works great). My case already has a filter for the front intake and the side fans fan cover has small enough holes that it traps dust pretty good.
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12/5/06 at 1:08pm