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#1
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fans -- the way the wind blows?
I've got two 620's on which I'm replacing various fans. To my surprise, on
one 620 the CPU fan was originally installed to blow into the case, on the other it was blowing out. Presumably that latter is the correct orientation (exhaust), but could someone confirm that? The service manual says nothing about the orientation of any of the fans. Can't believe they installed one of them backwards. These machines also have an expansion-card fan which blows in--is that correct, or is everything supposed to be exhaust? It's at the front of the machine, so I'm guessing it's facilitating air flow from front (intake) to back (exhaust). Lastly, are these chassis designed to operate best with all the unused card slots covered, or is there a cooling benefit to removing them? Thanks for your help. Michael Roper |
#2
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fans -- the way the wind blows?
"Michael Roper" wrote in message ... I've got two 620's on which I'm replacing various fans. To my surprise, on one 620 the CPU fan was originally installed to blow into the case, on the other it was blowing out. Presumably that latter is the correct orientation (exhaust), but could someone confirm that? The service manual says nothing about the orientation of any of the fans. Can't believe they installed one of them backwards. These machines also have an expansion-card fan which blows in--is that correct, or is everything supposed to be exhaust? It's at the front of the machine, so I'm guessing it's facilitating air flow from front (intake) to back (exhaust). Lastly, are these chassis designed to operate best with all the unused card slots covered, or is there a cooling benefit to removing them? Thanks for your help. Michael Roper Michael - I assume you're talking about the Optiplex GX620. Which specific form factor/chassis do you have there? Mini-Tower (biggest, standard tower) Desktop (horizontal or vertical use, mid sized) Small Form Factor ( also horizontal/vertical, smallest) Stew |
#3
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fans -- the way the wind blows?
Lastly, are these chassis designed to operate best with all the unused
card slots covered, or is there a cooling benefit to removing them? I'd say that was right, look at it like a jet engine, cool air sucked in hot air expelled out. Removing the pci slot panels usually disturbs the air flow. |
#4
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fans -- the way the wind blows?
S.Lewis writes:
I've got two 620's on which I'm replacing various fans. To my surprise, on one 620 the CPU fan was originally installed to blow into the case, on the other it was blowing out. Presumably that latter is the correct orientation (exhaust), but could someone confirm that? The service manual says nothing about the orientation of any of the fans. Can't believe they installed one of them backwards. These machines also have an expansion-card fan which blows in--is that correct, or is everything supposed to be exhaust? It's at the front of the machine, so I'm guessing it's facilitating air flow from front (intake) to back (exhaust). Lastly, are these chassis designed to operate best with all the unused card slots covered, or is there a cooling benefit to removing them? I assume you're talking about the Optiplex GX620. Which specific form factor/chassis do you have there? Mini-Tower (biggest, standard tower) Desktop (horizontal or vertical use, mid sized) Small Form Factor ( also horizontal/vertical, smallest) Oops, sorry. I didn't realize they reused model numbers. It's a Precision Workstation 620 (mini-tower), circa 2000. Its serial number is 12UCB (its sister is identically configured). A heavy-duty affair. Michael Roper |
#5
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fans -- the way the wind blows?
"Michael Roper" wrote in message ... S.Lewis writes: I've got two 620's on which I'm replacing various fans. To my surprise, on one 620 the CPU fan was originally installed to blow into the case, on the other it was blowing out. Presumably that latter is the correct orientation (exhaust), but could someone confirm that? The service manual says nothing about the orientation of any of the fans. Can't believe they installed one of them backwards. These machines also have an expansion-card fan which blows in--is that correct, or is everything supposed to be exhaust? It's at the front of the machine, so I'm guessing it's facilitating air flow from front (intake) to back (exhaust). Lastly, are these chassis designed to operate best with all the unused card slots covered, or is there a cooling benefit to removing them? I assume you're talking about the Optiplex GX620. Which specific form factor/chassis do you have there? Mini-Tower (biggest, standard tower) Desktop (horizontal or vertical use, mid sized) Small Form Factor ( also horizontal/vertical, smallest) Oops, sorry. I didn't realize they reused model numbers. It's a Precision Workstation 620 (mini-tower), circa 2000. Its serial number is 12UCB (its sister is identically configured). A heavy-duty affair. Michael Roper Michael, http://support.dell.com/support/edoc...n/sm/remmt.htm Gotta be honest and say that I don't know. Most Dimension/Optiplex units pull air over the passive heatsink and exhaust it out of the case. The only exceptions I've seen have been either fans mounted directly onto the heatsinks pulling air over and out from the CPU (PIII/Celeron era), or the dual-fanned GX520 SFF which had two fans in a "tunnel" formation; one mounted in front of the heatsink, the other behind - and both pulling air in the same direction out of the case. The Dim4700 actually had a single fan pulling air in, blowing it over the heatsink - but I think that was a fluke of sorts. Typically, the labeled side of the fan is the exhaust side. Stew |
#6
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fans -- the way the wind blows?
S.Lewis writes:
Gotta be honest and say that I don't know. Most Dimension/Optiplex units pull air over the passive heatsink and exhaust it out of the case. Thanks Stew. I'm going with what seems the logical approach and making the fan at the front vent an intake (which it was already configured to be on both machines), and all the fans on the back side exhaust. If it catches fire, I'll try something different. Michael Roper |
#7
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fans -- the way the wind blows?
"Michael Roper" wrote in message ... S.Lewis writes: Gotta be honest and say that I don't know. Most Dimension/Optiplex units pull air over the passive heatsink and exhaust it out of the case. Thanks Stew. I'm going with what seems the logical approach and making the fan at the front vent an intake (which it was already configured to be on both machines), and all the fans on the back side exhaust. If it catches fire, I'll try something different. Michael Roper Cool. Just don't let the "magic smoke" out of the box. Stew |
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