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post #11 of 18
Prime95 load temps.

NOW
post #12 of 18
Whew, oh boy.

1) Nevermind the "pressure" bit. I don't think I explained myself well, and for that reason I'll probably make the same mistake again now. But yes, more cfm = more air. More air = more "substance" to absorb heat and move it along.

2) Again, my bad. Hot air does rise given certain criterion, I was just saying some people use it as an all-encompassing design aspect. The front of cases have removable media drives on top for human factors reasons, and you're right - the top on the back because it IS more thermally efficient that way.

Summary: I was kind of ranting and wasn't very helpful. The gist is: you did great, and what's important is large amounts of air coming IN the case and then EXITING it in the same quantity.

I hope that clears things up. It IS 3am here...so ignore what you don't like.
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post #13 of 18
Thread Starter 
Quote:
Originally Posted by SpeedNuggeT View Post
Prime95 load temps.

NOW
I'm not sure what settings I was supposed to change, so I left it default. I'm also not sure how long I was supposed to run it, so I let it run about ten or fifteen minutes.

Idle:


Load:


It fluctuated between 51C and 53C the whole time. My window is crack, but not enough to let a finger through, so my room does see some warmer conditions.

I'm also not sure why my +5V rail and +3.3V rail are dropping again. The +3.3V rail went to almost ~2.8V before I swapped my old video card out for the one I have now. Not sure what to make of it but it's stable?
Quote:
Originally Posted by Aeschylus View Post
Whew, oh boy.

1) Nevermind the "pressure" bit. I don't think I explained myself well, and for that reason I'll probably make the same mistake again now. But yes, more cfm = more air. More air = more "substance" to absorb heat and move it along.

2) Again, my bad. Hot air does rise given certain criterion, I was just saying some people use it as an all-encompassing design aspect. The front of cases have removable media drives on top for human factors reasons, and you're right - the top on the back because it IS more thermally efficient that way.

Summary: I was kind of ranting and wasn't very helpful. The gist is: you did great, and what's important is large amounts of air coming IN the case and then EXITING it in the same quantity.

I hope that clears things up. It IS 3am here...so ignore what you don't like.
No, it was a good stuff. I did make this for comments/feedback to learn, afterall, so I wanted to make sure the common conception of hot air rising, which is one I have used, wasn't being done wrongly.

In any case, I don't think the CFM on my case fans are too high. The front two, and the top and rear, are all the same fan, which is this one.

http://www.xigmatek.com/product.php?...=specification

The three side ones are quieter/lower speed basic Cooler Master fans. I think it's this one.

http://www.coolermaster.com/product....category_id=63
post #14 of 18
Back & Top fans = Exhaust = Good (Warm air goes up)
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post #15 of 18
Quote:
Originally Posted by pepejovi View Post
Back & Top fans = Exhaust = Good (Warm air goes up)
Unless the pressure differential induced by the thermal inequality is less than the pressure differential induced by the velocity of a streamline airflow near it.

^That's what I was trying to get at earlier. I like this explanation better.
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post #16 of 18
Looks like a real decent setup, lots of space, did a nice job with the cable management too man.... Nice Clean Build, should have good airflow....I like it
post #17 of 18
Quote:
Originally Posted by Aeschylus View Post
Unless the pressure differential induced by the thermal inequality is less than the pressure differential induced by the velocity of a streamline airflow near it.

^That's what I was trying to get at earlier. I like this explanation better.
Yeah. Sure...

Anyways, thats what i've always thought and thats how i have set my haf912 up.
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post #18 of 18
Hot air rises because of a difference in pressures. Hot air = high pressure, cold air = low pressure.

I should do a Guide on case aerodynamics...

But first I'm going to bed. OCN: you're the bane of my sleeping existence.

*exeunt*

Edit: holy frak. I can't believe I messed that up. Going to bed now...pretending no one saw it...
Edited by Aeschylus - 4/2/11 at 2:14am
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