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Another 800D airflow thread.

post #1 of 23
Thread Starter 
Yes, I've read through every thread in this forum concerning 800D fans and airflow. Yes there's a lot of them, and no I haven't found any definitive answers.

It seems everyone has their own opinion on how to "optimize" airflow in the 800D. Maybe I should start by explaining my situation.

I have water on my cpu and entire mobo. My GPU is not on water. So I need decent airflow. I also need quiet airflow.

About the only thing I know for sure is that I need to replace the stock fans. Other than that, I'm totally confused. Some people say to reverse the rear fan, but from what I have read, that's just a bad idea. Others say that you need an additional 140mm at the bottom of the case, but who knows if that's true.

And aren't top fans kind of overkill unless you have a rad up there? It makes no sense to have a single 140mm intake and then 140mm + 3x 120 mm exhaust. It's going to suck all the air out too quickly? Right?

If noise wasn't an issue, I suppose I could get a powerful 140mm on the bottom and then some lower speeds for the exhausts, but that's a moot point.
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post #2 of 23
Well, it's all up to opinion really.

Like for example, I have all my fans blowing into the case with only the stock 140mm fan on the rear as exhaust. So 3 120's up top blowing in which keep my ram and vr's cool along with the NB. 2 120's at the bottom to bring in some air for the hd fan. and of course the intake fans are bringing in cool air through the rads which is then heated up a bit but it still does a great job when all the sides are on.

Works great for me, but it's subject to opinion and may work horribly for you.

It'll take time and the willingness to try several configurations. I went through about 8 configs before I settled on the one I'm using. That's one of the great things about this case, you have many ways to accomplish what you want.
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post #3 of 23
Thread Starter 
Yeah I'm trying to follow the case's natural bottom to top airflow. I don't really see any point in changing fan directions.
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post #4 of 23
Here is my airflow:



Check out my build log and the The Corsair H50 Accessory Permalink.
post #5 of 23
before i put my gpu into the loop i had the same issue as you and i sympathise. unfortunately its just a case of killing an afternoon with a crapload of fans, realtemp and a pen and paper.

one combination might give you better results but i could never crack it.

love the case though
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post #6 of 23
Quote:
Originally Posted by Pings View Post
Here is my airflow:



Check out my build log and the The Corsair H50 Accessory Permalink.
This is the best airflow setup for that case. You may also want to mod the side panel and add two 120mm intake fans. Use powerful fans such as Panaflo or Delta 120mm x 38mm fans. Nice sketch up by the way.
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post #7 of 23
Ok I'm going to have to explain this with little more detail because there is so much misinformation going it has people believing it that shouldn't. This hole thing about the airflow and how the 800D is only good for liquid cooling is nonsense. 1st off liquid cooling and air cooling are both based off a heat exchange. What would be bad for one would be bad for the other. Can we all stop this liquid cooling airflow psychobabble about the 800D. There are several factors people don't take into account. Lets compare the 800D to the HAF. The HAF has superior airflow, but several 800D club member have reported better temperatures when compare to their old HAF's. Why is that? Its because the 800D has superior cooling features. It has 3 separation of heat sources. The case design does not let allow for the mixing of hot and cold air. All heat sources have their own paths of ventilation. The 800D has the best cable management system of any case. You couldn't even run your wires messed up if you wanted to. Do to the design of the cable management system it actually does not affect your airflow once inside your case, as much as other cases. Less resistance means better airflow. Now lest look at resistance a lot of cases. These cases have a front intake only to have HDD bay behind it. To do this very common design two thing go wrong. There is resistance and a heat transfer do to your HDD's. So now not only has the resistance of the HDD bay decreased your airflow, the HDD's them selves have absorbed the cool air entering the case and are now rejecting heat into your airflow. That hot air is now on your hardware, but wait a minute. Doesn't your hardware heatsinks or liquid cooling equipment both work off a heat transfer? Yes it does. But, is it going to work as good with the hotter air that is now inside your PC case? No do to the hotter air there is less of a give and take of heat. It is cooling but not as well as it should be. That is why the 800D has superior cooling features. Now if anyone in any case wants to further cool and or increase their airflow you can add a Drive Bay Coolers (5.25"). Check out the The Corsair H50 Accessory Permalink even if you don't have the H50 there are some helpful links.
Edited by Pings - 6/12/10 at 4:59pm
post #8 of 23
Thread Starter 
Quote:
Originally Posted by Pings View Post
Ok I'm going to have to explain this with little more detail because there is so much misinformation going it has people believing it that shouldn't. This hole thing about the airflow and how the 800D is only good for liquid cooling is nonsense. 1st off liquid cooling and air cooling are both based off a heat exchange. What would be bad for one would be bad for the other. Can we all stop this liquid cooling airflow psychobabble about the 800D. There are several factors people don't take into account. Let compare the 800D to the HAF. The HAF has superior airflow, but several 800D club member have reported better temperatures when compare to their old HAF's. Why is that? Its because the 800D has superior cooling features. It has 3 separation of heat sources. The case design does not let allow for the mixing of hot and cold air. All heat sources have their own paths of ventilation. The 800D has the best cable management system of any case. You couldn't even run your wires messed up if you wanted to. Do to the design of the cable management system it actually does not affect your airflow once inside your case, as much as other cases. Less resistance means better airflow. Now lest look at resistance a lot of cases. These cases have a front intake only to have HDD bay behind it. To do this very common design two thing go wrong. There is resistance and a heat transfer do to your HDD's. So now not only has the resistance of the HDD bay decreased your airflow, the HDD's them selves have absorbed the cool air entering the case and are now rejecting heat into your airflow. That hot air is now on your hardware, but wait a minute. Doesn't your hardware heatsinks or liquid cooling equipment both work off a heat transfer? Yes it does. But, is it going to work as good with the hotter air that is now inside your PC case? No do to the hotter air there is less of a give and take of heat. It is cooling but not as well as it should be. That is why the 800D has superior cooling features. Now if anyone in any case wants to further cool and or increase their airflow you can add a Drive Bay Coolers (5.25"). Check out the The Corsair H50 Accessory Permalink even if you don't have the H50 there are some helpful links.
Thank you!!!

This actually makes sense. Most everything you said is logical and understandable.

So now I have a couple of questions.

1.I'm a total noob to drive bay coolers. What are they all about? Are they quiet? It it basically just another fan? Which one is best for the 800d?

2.Obviously I do need to replace the intake and rear exhaust fans. What would you guys recommend for noise/performance balance? I've heard this is a good one but it's a bit pricey I must say.
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Monolith
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post #9 of 23
Quote:
Originally Posted by james... View Post
Thank you!!!

This actually makes sense. Most everything you said is logical and understandable.

So now I have a couple of questions.

1.I'm a total noob to drive bay coolers. What are they all about? Are they quiet? It it basically just another fan? Which one is best for the 800d?

2.Obviously I do need to replace the intake and rear exhaust fans. What would you guys recommend for noise/performance balance? I've heard this is a good one but it's a bit pricey I must say.

1. Its just another fan. In this case and a lot of others is used for a direct intake for your main heatink(CPU), main exhaust fan, and or top radiator. No resistance no heat transferred air. Just fresh uninterpreted ambient air read to exchange with heat.

2. I have no idea about most fans. I do know the CM R4 series moves a lot of air and it is quiet.
post #10 of 23
Thread Starter 
That sounds very enticing. Although a lot of them look a bit ugly to be honest. (I'm unashamedly concerned with aesthetics on my 800D) I will say the Silverstone unit looks to be the most acceptable. Any pics of it with the 800D?

I suppose I'll have to do my homework on fans. A google search for "quiest high performance 140mm" might turn up something. Who knows.
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Monolith
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