Hi,
Recent owner of an ATCS840 here and I think I can answer some of your ATCS840 questions. I use all my optional fans ncluding the 2x120mm fans at the back of the 3.5" drive cage. As the case is so huge I feel this helps with the airflow. My bottom fan is intake. I don't use the fan shroud at the back tho as it doesn't seem to affect my temps much. I also disabled the front top 230mm fan. My only exhaust is the rear 120mm and just the one 230mm fan at the top rear. I feel having the front top fan on removes cool air before it gets to the components in the case so I had that off and covered the grill.
Another reason I did that is I prefer having a positive pressure instead of negative pressure in the case (Intake>Exhaust).


first post!

This post has been edited by SanjuroM: Jul 31 2009, 11:31 AM

Thanks
I'm in the process of painting the interior of my ATCS840 so I might put up some pics of the job.
Is there a specific thread for pics?

edit: nm I just saw one in the sticky

This post has been edited by SanjuroM: Jul 31 2009, 07:09 PM

Cooling is better but not so much due to the postive pressure - but from not connecting the front top 230mm fan (the cool air isn't routed out prematurely but gets routed to the areas that need it) and having the optional fans installed. In fact with that fan config it's more of a neutral pressure because the only added intake is the bottom fan. I just don't like having neg pressure because it just negates the purpose of having dust filters on all intakes that already comes with the case. One of the reasons I chose this case were the included dustfilters - thus having neg pressure (dust would come in thru the gaps in the case) wouldn't make much sense which I think is a bit of a design flaw by CM. Luckily it's easily remedied by disabling the forward top fan and adding a bottom intake which is already filtered - so you get 2 added benefits: improved airflow and less dust.

I'm thinking of adding a Scythe Kama Bay at the front just above the front intake - and have cool air blow straight into the mobo area. It takes up 3 5.25" bays. One of the advantages of having 6 bays on the 840 to play with. But it's hard finding one in my area..

This post has been edited by SanjuroM: Aug 1 2009, 04:45 AM

My case right now is completely taken apart for paint work..and awaiting parts for new components like new cpu, cpu cooler , mobo, vid, ram - basically complete overhaul lol. But yeah I plan to use the 230mm stock fans - kinda hard to find non stock ones that fit this case. I know CM sells a blue led 230mm fan specifically for the Storm Sniper, that might fit, not sure. Also the Scythe Kama Bay I linked earlier, comes with blue led 120mm fan that shows through the mesh - and you can swap out a different led fan if you are so inclined.

I didn't derivet - used plain old fashioned painters tape after removing everything that can be removed (screws, plastics, fans etc)
Look at my pic in http://forum.lowyat.net/topic/1102953 pg 5. Riveting is still the best way to do it but for less trouble taping is easier.

cool. You're only painting the bare aluminium right? If so if you can find self etching primer you won't need to sand the bare alum - just have to sand in between primer and paint coats. Keep us updated on your progress if you do find those rivets.