two2the16th Posted June 26, 2009 Share Posted June 26, 2009 I have a couple of questions about the CMPSU-850TX power supply. The first is pretty simple: In what direction is the fan blowing? That is, is it pulling air in or blowing it out? I assume it’s the latter but I want to be sure. Second: My case is a non-Corsair-brand model P180B; a picture is attached. The power supply I’m currently using has the more conventional fan-in-the-back design and I want to know if my case will provide enough airflow for the CMPSU-850TX’s fan-on-top deign. As you can see in the picture, the power supply gets installed in a separate chamber at the bottom of the case and while there is some clearance for top-side ventilation, there’s not a great deal of it. However, there is a 120mm fan blowing front-to-back right in front of the PSU. As a side note, the PSU currently installed is 5.9” long. According the specs the CMPSU-850TX is 6.3” long. That’s only a difference of 0.4” which from looking at it seems like it should be fine. But it might be tight so I’m a little concerned. If anyone has used the CMPSU-850TX in this case (or one of its subtle variations), I’d appreciate it if you might share your experiences. Thanks Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted June 26, 2009 Corsair Employees Share Posted June 26, 2009 The fan sucks air in, and directs it out the back. I would install the PSU with the fan facing down in your case. The length of the PSU should not be an issue. Link to comment Share on other sites More sharing options...
two2the16th Posted June 26, 2009 Author Share Posted June 26, 2009 The fan sucks air in, and directs it out the back. Thanks for the clarification. I would install the PSU with the fan facing down in your case. Ok, but why? Link to comment Share on other sites More sharing options...
two2the16th Posted July 3, 2009 Author Share Posted July 3, 2009 Bump. I’d still like to know why you recommend installing it upside-down in this case. There doesn’t seem to be any greater clearance on the bottom than the top. Thanks Link to comment Share on other sites More sharing options...
Wired Posted July 3, 2009 Share Posted July 3, 2009 That's just the standard. If there's a vent at the bottom so much the better. Fresh air. Link to comment Share on other sites More sharing options...
two2the16th Posted July 3, 2009 Author Share Posted July 3, 2009 That's just the standard. If there's a vent at the bottom so much the better. Fresh air. That I’d understand, but there is no bottom vent. There is no grill anywhere on the bottom of the case; it sits directly on the floor (no casters or legs of any kind). The air comes in through a grill in the front and is blown out the back either through the PSU or through the vent holes around it. There is a 120mm fan in the center of the chamber that facilitates the airflow. Or, are you saying that it’s simply standard practice to mount it upside-down whenever feasible? If so, why? I’m not opposed to mounting it upside-down I just want to understand the reasoning. Thanks Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted July 6, 2009 Corsair Employees Share Posted July 6, 2009 If there is no clearance at the bottom of the PSU, then you might want to install the PSU upside down instead. I would only install the PSU with the fan facing down if there is an inch clearance or vent at the bottom. Link to comment Share on other sites More sharing options...
Orion427 Posted July 27, 2009 Share Posted July 27, 2009 How did this solution work for you? I'm having the same problem with the Antec 900 case and the psu sits on the bottom of the case... Link to comment Share on other sites More sharing options...
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