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CM 690 II Advanced Cooling Suggestion

post #1 of 20
Thread Starter 
Hi,

I've been a lurker for some time and figured I'd finally join. I have a question regarding cooling my case.

I have a CM 690 II Advanced (Like the title says) and 6x Scythe Kama Flow 2 1900RPM fans hooked up to a Scythe Kaze Master Pro fan controller.

I currently have 3 intakes (2 bottom, 1 front) and 3 exhausts (2 top, 1 rear). I only put these here because I enjoy symmetry, and also I have no clue what the best placement is.

What's the best setup for my fans and what RPMs should I run them at?

Also, I'm replacing my heatsink fan with a Delta PWM fan which I'll be ordering soon.

Here's a picture of my case to give reference to my possible airflow.

All suggestions are welcome!

022onp.jpg
post #2 of 20
If I were you, I would add a fan on the lower side pannel to bring cool air streight to the GPU.

Also, I pulled all the dust filters out and it helped alot with airflow. I know people would think that's stupid and now your case will get dusty faster but if you have positive case pressure it doesnt make much diffrence.
Edited by Shaded War - 7/29/11 at 12:12am
post #3 of 20
Ah, a near-perfect case for air cooling, and a great air cooler.

Item 1 in my sig is getting old, but has a bunch of fans. I think I'll re-do it with PWM fans.

As for your case, compare these temps: the way you have it vs forward top fan set to intake (air goes down to bring cool air to the front of the Megatron).

GTG
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post #4 of 20
ooooops. snip that.
Edited by Peyotero - 7/29/11 at 8:52am
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post #5 of 20
First off let me say I love this case. So much so that I used for both my Sandy Bridge builds back in January.

I've done tons of different fan configurations and lots of testing as to what give the best overall temps for not only the CPU, but the rest of the components. So far it looks like you're off to a great start. Here is what I'd recommend based of my real world results with this case:

1. Turn your top front fan to intake.
2. Take off the top rear fan and block off that hole
3. Put a 120mm or 140mm fan in the 5.25 bay as an intake (see ehumes guide)
4. Add a pull fan to your CPU heatsink
5. Remove the exhaust fan from the back and cut out the fan grill.
6. Remove any used PCI expansion slot covers and either [ame="http://www.amazon.com/gp/product/B0040JHMIA"]purchase these[/ame], or leave off and empty.

By doing the above you should see a nice decrease to not only CPU temps, but overall case temps as well. If you are worried about noise, a fan controller is a big plus. I have one so that when it cooler out I can lower the fans all around and keep temps under control. I fold on both my computers full time so both the CPU and GPU are under constant load. That is why temps and airflow are so important to me. As has been stated, this is a great case with many options. I think you'll enjoy all it has to offer, I know I do.
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post #6 of 20
may i suggest this fan instead of the delta?
Its just something to think about.

It doesn't have that high pitched whine that many high CFM fans do.
[ame="http://www.youtube.com/watch?v=Y0bvShNDT4M"]http://www.youtube.com/watch?v=Y0bvShNDT4M[/ame]
post #7 of 20
Thread Starter 
Quote:
Originally Posted by kody7839;14391971 
First off let me say I love this case. So much so that I used for both my Sandy Bridge builds back in January.

I've done tons of different fan configurations and lots of testing as to what give the best overall temps for not only the CPU, but the rest of the components. So far it looks like you're off to a great start. Here is what I'd recommend based of my real world results with this case:

1. Turn your top front fan to intake.
2. Take off the top rear fan and block off that hole
3. Put a 120mm or 140mm fan in the 5.25 bay as an intake (see ehumes guide)
4. Add a pull fan to your CPU heatsink
5. Remove the exhaust fan from the back and cut out the fan grill.
6. Remove any used PCI expansion slot covers and either purchase these, or leave off and empty.

By doing the above you should see a nice decrease to not only CPU temps, but overall case temps as well. If you are worried about noise, a fan controller is a big plus. I have one so that when it cooler out I can lower the fans all around and keep temps under control. I fold on both my computers full time so both the CPU and GPU are under constant load. That is why temps and airflow are so important to me. As has been stated, this is a great case with many options. I think you'll enjoy all it has to offer, I know I do.

2) What material should I use to block off the top rear hole?
3) I have a Kaze Master Pro in my top slot and a CD-Rom in the slot underneath it. If I were to move my CD-Rom to the bottom slot it'd open up enough space for this mod but I'd only be able to place it in the rear portion of the bays. Would this even be worth it with these constrictions?
4) I had 2 Kama Flow Flex's in push/pull but for some reason when I have a pull fan on my megahalems at a higher RPM it makes terrible noise. I tested this by putting it where it'd sit mounted with both push/pull @ 100% and moving it away from the spot. That's why I'm looking into a single high CFM PWM fan like the Delta.
5) Although I know this does improve substantially, I think the air would slow enough while moving through the fins from only having a push fan that a rear exhaust might be useful. Also, I don't really want to start cutting my case up.
6) I'll take 'em!

All great suggestions and I'll use as many as I can thumb.gif

Quote:
Originally Posted by xaborus;14392685 
may i suggest this fan instead of the delta?
Its just something to think about.

It doesn't have that high pitched whine that many high CFM fans do.
http://www.youtube.com/watch?v=Y0bvShNDT4M

Although I would assume this fan works phenomenally, I would like to use a PWM fan (Call me lazy). Could you suggest a good high quality PWM fan that can run off the mobo header (Max 2 amps)? And what would push more air while at the same RPM but quieter, 120x25 or 120x38?


Also, do you guys think my bottom intake right under my HDD restricts the airflow coming from the front intake? I'm contemplating using one of the suggestions above and moving it to my lower side panel cutout and blasting my GPU.
Edited by meeps - 7/29/11 at 2:14pm
post #8 of 20
Is that a 120mm or 140mm fan port?

You could use something like this.

http://www.mountainmods.com/mountain-mods-120mm-clear-acrylic-blowhole-cover-p-150.html
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post #9 of 20
For me, I got better GPU temps using a fan on the lower side panel as an exhaust rather than an intake. Also, my CPU temps decreased when I mounted a 120mm fan in the 5.25" drive bays (zipties FTW)
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post #10 of 20
Quote:
Originally Posted by meeps;14395375 
2) What material should I use to block off the top rear hole?

You can get sheets of stiff plastic from hobby stores. They're used to make buildings in model train dioramas.
Quote:
3) I have a Kaze Master Pro in my top slot and a CD-Rom in the slot underneath it. If I were to move my CD-Rom to the bottom slot it'd open up enough space for this mod but I'd only be able to place it in the rear portion of the bays. Would this even be worth it with these constrictions?
Probably, but I'll let kody answer for sure.
Quote:
4) I had 2 Kama Flow Flex's in push/pull but for some reason when I have a pull fan on my megahalems at a higher RPM it makes terrible noise. I tested this by putting it where it'd sit mounted with both push/pull @ 100% and moving it away from the spot. That's why I'm looking into a single high CFM PWM fan like the Delta.
The Megatron becomes an oboe with the right fans. It likes to do this with S-Flexes, too.
Quote:
5) Although I know this does improve substantially, I think the air would slow enough while moving through the fins from only having a push fan that a rear exhaust might be useful. Also, I don't really want to start cutting my case up.
Not all interventions are needed.
Quote:
6) I'll take 'em!
You're better off with empty slots.
Quote:
All great suggestions and I'll use as many as I can thumb.gif
That's the spirit.



Quote:
Although I would assume this fan works phenomenally, I would like to use a PWM fan (Call me lazy). Could you suggest a good high quality PWM fan that can run off the mobo header (Max 2 amps)? And what would push more air while at the same RPM but quieter, 120x25 or 120x38?
I found a PWM fan here. But you have to mod them, proceeding very carefully.

Personally, I'd always mod these things to take power from the PSU if I were truly going to use them in a rig.

Quote:
Also, do you guys think my bottom intake right under my HDD restricts the airflow coming from the front intake? I'm contemplating using one of the suggestions above and moving it to my lower side panel cutout and blasting my GPU.

I believe it will redirect the front intake to an upward vector . . . unless you make the bottom intake too strong.
Quote:
Originally Posted by Jras;14396049 
For me, I got better GPU temps using a fan on the lower side panel as an exhaust rather than an intake. Also, my CPU temps decreased when I mounted a 120mm fan in the 5.25" drive bays (zipties FTW)

The side exhaust should give better gpu temps in a case with bottom intake(s). With the 690, you're generously supplied.
Edited by ehume - 7/29/11 at 10:33pm
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