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II have two 120mm fan which push fresh air directly to the two pci cards laterally.In my Cosmos II case I have also:one front 200mm fan (IN),two 140mm(OUT) on the top and one 120mm on the back(OUT), I don't think that I could have inlet temperature problem.Neonator,to me is not safe modify the original dissipator,the best thing is changing that dissipator!I contacted Astek and I was disappointed by its answer too!
The cooling requirements of your cards are less strong than 31S1Ps but above all I fear that modifying the duct with two holes for the power terminals I could leak static pressure.I enlarged the photo of Puget (I know that it is not completely clear) but I noitice two thing:
A) the terminal part of the duct doesn't cover all the PHI card.
B) With that width of blower sicurely they used a 80x80x35 fan and all of them are loud.
However Neonator could try the solution that you suggest,Mr. Dempesey, and show here the results...I'm a little bit tired to work with glue,cutters ecc. :) :)
That fan controller will not work. You need one that uses temperature sensors that you can place at the exhaust side of the MIC and where the fan speed is controlled by that sensor. You will need one with at least two sensors and two fan outputs. I suggest selecting a fan controller with more sensors and outputs to provide better cooling control over several case fans.
You must provide airflow to the section between the power connectors. It looks as if you can easily modify your duct to bulge out into the space between the power connectors. Then fill in any gaps.
Jim Dempsey
I increased the speed of my 3 bigger fans in the Pc case (2X(140x140) and 1X (200x200)) because they produce very little noise,gaining lower temperture as you can see in the posted picture.In this way I can reduce manually the power of the Phi's fans so that they produce lower noise.According to your experience,Mr. Dempsey,what is the right value of the temperature during idle time of the cards?And ,during heavy workloads,what is the limit?
Hi Mr.Dempsey I'd like to share a "little revolution" in my hardware to get the goal of low temperatures and possibly low level noise and it can be useful to others.First of all I changed the fans,I choosed a more powerful model: 6800 rpm,99 cfm and above all 1.0 in. H2O of static pressure (http://www.digikey.com/product-search/en?KeyWords=AFB0812GHE-F00&WT.z_header=search_go).Ok at maximum speed the noise is 54 dB ,but only at its maximum,infact they are controlled by the Aerocool Touch-2100 ,a fan controller with also heat sensors.I tuned it so that when the temps of the cards are under 45°, the the fans work at half of their potential with of course less noise ,but when the workload became high and the temperature is over 45° they work at their maximum,but in this case I can go out the room leaving them to their calculations,important is not becoming mad during the development of algorithms.After an hour of intense calculus the temp did not go over 68° in the phi panel.
Laterally I also mounted a big 200mm fan to push ari into the case as you can see in the photos posted.
