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[Official] Cooler Master ATCS 840 Owners Club - Page 142

post #1411 of 4392
I just got my black 840 yesterday and it looks great! I am planning on putting a pa120.3 on the top and a MCR320 by the hd cage. I really don't want to go through all 141 pages so heres my question. Are there any good ways to modify the power supply filter or to stiffent the side panels? I saw someone on youtube who cut the aluminum behind the powersupply so the fliter could be pulled out the back, but I would think that would severely weaken the base of the case.
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post #1412 of 4392
Quote:
Originally Posted by lilmanmgf View Post
Are there any good ways to modify the power supply filter or to stiffent the side panels? I saw someone on youtube who cut the aluminum behind the powersupply so the fliter could be pulled out the back, but I would think that would severely weaken the base of the case.
Do you have a link for the youtube video??
I am about to do the same mod (turning the ps filter around 180°). Without having done it yet, I think the reinforcing bar inside the case bottom (those shiny plates front&back) provide all the stiffening the case needs. And as long as you cut out only what is absolutely necessary, it SHOULD be OK.

My back-up-plan would be to stiffen the corners with either a three-sided bracket or a solid piece of aluminium (at least 1"x1"x1").

To stiffen the side panels you could apply some silencing panels. Alternatively, glue one or two metal strips of 0.1". Even with the anodized surface, a good 2 component glue should be enough. If you intend on "stressing" the panels with cable bundels and such pushing against, you will need to strip/sand the finish off before glueing.
Then there is always the ever popular Acrylic Window solution.
     
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post #1413 of 4392
To make life eaiser I would have moved the bracket to the other side of the fan hole, but that too would just further reduce the strength.

YouTube- Cooler Master ATCS 840 PSU Fan Filter Fix
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post #1414 of 4392
Actually I think I will do this. I'm going to reverse the power supply mount orientation as well as the support bracket. I'll just make and mount a second bracket on the underside of the case towards the rear.
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post #1415 of 4392
Why do you need to move the bracket (The steel bar)??
You just may make two additional cut outs in the power supply mount to straddle the support bracket in its original position.
That can't be any more difficult than make a second support bracket....
     
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post #1416 of 4392
Quote:
Originally Posted by mru View Post
Why do you need to move the bracket (The steel bar)??
You just may make two additional cut outs in the power supply mount to straddle the support bracket in its original position.
That can't be any more difficult than make a second support bracket....
If you don't move the stock bracket you will have to cut the groves on the filter in order for it to fit. To make the connection tighter you would need to add foam or some other filler. I think you are underestimating the amount that the back piece stiffens up the frame. That angle piece in the back reduces the amount the case will bend at that point by about 14.5 times.

Edit:
I just realized the feet attatch to that support, so I guess moving it would be a little more involved. I still main an additional support should be added to the underside if you cut the back.

So far I have modified the top of the harddrive cage to allow me to mount a 360 rad on it. I'm going to drill four holes in the cage to mount to the radiator slightly shifted up.



Edited by lilmanmgf - 4/29/10 at 2:14pm
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post #1417 of 4392
Nice clean cut!!!

Back to the filter question:
Is the value of 14.5 including the stiffening effect of the steel bracket? And assuming the back piece is cut away 100%?
     
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post #1418 of 4392
The 14.5 is looking just at the back section and does not take into account the steel support. While these supports do stiffen the chasis somewhat, it looks like their primary purpose is to ensure the feet do not pull out of the thin aluminum body. The fact that they do not span the entire bottom section further hints at this. I am pretty certain that if you remove the back section the material will bow slightly once the cut is made. Also a if a force is applied to the top of the case it will flex to the sides more.

That being said when the case is just sitting there it may not be that big of a deal. This stuff would only really matter when you are transporting the case. Good luck, I like what you have done so far.
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post #1419 of 4392
You seem to know what you is talking about. In particular what you pointed out with the steel bracket not spanning the entire width.

hmmm....

off the top of my head I can come up with only two ideas:
1. Add an aluminium right angle piece of at least 1/10" and fasten it to bottom and back piece. Cut out only what is absolutely necessary to get the filter out (btw: the filter plastic frame can easily be reduce by half of its thickness.).
2. Leave erverything as is and use a magnetic fan filter and just stick it to the bottom! That part of the case is steel, right?
     
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post #1420 of 4392
Hey there one question, do u guys keep the front cover with CM logo on remove it for better air intake???
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