I've been looking forward to writing this article for like, forever.
Background:
As computer systems have grown and evolved over the years they have also grown hotter and this heat appears to be the source of random un-associated errors. More than a year ago I started to make the connection between higher PC operating temperatures and system errors and so began my quest for a cool PC.
I don't overclock, but I do add more hardware to my configurations, and with the advent of RAID technology the number of HDDs has grown to 5 in my number 1 machine, and a whopping 9 in my number 2.
I've tried many different configurations over the years, mostly just adding and changing the number and position of internal 12 volt system fans but my current setup uses two different designs and two different sets of fan types and locations.
There aren't any rules about PC design for temperature reduction (none that I can find anyway) the changes I've made to my PC's are based on common sense and experience - things that work remain things that don't work are discarded.
Tidy Internals:
I have no wish to put a glass from on my PCs or install internal lights, but I do like the insides of my boxes to have a clean look - without cables floating about. In addition to being pleasing to the eye, this lack of cablling should contribute to a modest increase in the air flow through the box. The little I can find on the subject focuses on cooling the CPU and memory, while I find that keeping the disks cool is at least as important.
PC bgcolor="#1 features an attempt that mimics opening the case and putting a desk fan on the insides. My setup was just that for about 3 months until I got fed up with the clutter. The jury is still out on this design as the door fan tends to make more noise, and I suspect it uses more power as it plugs into the mains rather than drawing its power from the PC power supply.
In this design air is forced into the side and out both front and back ends passing over both the CPU and the Disk array to provide the cooling.
The design works to keep the unit cool, but I think I like my first design (the one now in use on PC bgcolor="#2) better.
Reverse Engineering
The cooling design for PC bgcolor="#2 came about as a result to my switch to RAID technology and the eight disks that are required to achieve the large disk capacity I was after.
A separate goal for this design was "easy access" to the back plane. I'd designed a cabinet that provided roll-out shelves to allow an operator to get at the plugs on the back of the PC and the design works. Plugging and Unplugging cables from the back connectors is certainly made easier by sliding the whole PC forward, but there is still a bit of shifting and stretching required to perform the actual cable operation.
given that the fan array had fully taken over the front panel and there were no useable connections to be had I figured out a way to re-locate all of the controls and connectors that were on the front panel to the back panel and reverse the orientation of the PC in the cabinet so the backplane faces out into the room and provides full and easy access to every part of the system I might want to address.
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