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Project: I have no idea what I'm doing (Custom desk build) - 10/8 Almost done! - Page 2

post #11 of 157
pretty much. I mean depending on how deep your desk is and how tall you are, it shouldn't be that difficult, you could always just walk over to the side as you shouldn't have it against 2 walls anyways since that is poor air circulation. I wouldn't really have a side fan blowing at the GPU but I guess having a slow 200mm fan or something couldn't hurt. I don't know what is under the computer, if it is drawers or anything but you could always have a fan under the motherboard to intake some cool air.
   
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post #12 of 157
Since the area holding the motherboard seems to be fairly small you could always get yourself 4 very good fans and create a fairly simple positive pressure wind tunnel. Just make sure the two intake fans are operating a bit faster than the exhaust fans.

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post #13 of 157
Thread Starter 
Quote:
Originally Posted by chinesethunda View Post
pretty much. I mean depending on how deep your desk is and how tall you are, it shouldn't be that difficult, you could always just walk over to the side as you shouldn't have it against 2 walls anyways since that is poor air circulation. I wouldn't really have a side fan blowing at the GPU but I guess having a slow 200mm fan or something couldn't hurt. I don't know what is under the computer, if it is drawers or anything but you could always have a fan under the motherboard to intake some cool air.
Well I planned to have the back edge of the desk, flush or maybe a half inch from the wall. I drew a "wall" in the drawing to illustrate what I'm talking about:




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post #14 of 157
Actually, I just had a momentary stroke of awesomeness lol. Since you are in control of how this turns out, you could have 2-4 fans in the front, I am also going to assume you will have some sort of decent cpu heat sink which contains 2-3 fans, now my idea is (taken from ehume's thread somewhere) have NO rear exhaust fan, simply have an open cutout behind the CPU heat sink where the it is blowing out air, and then all the air pressure will be forced out the back, you could always cut out some smaller holes in varying places in the rear to make sure no hot air is trapped, which is a good idea. But this is a perfect place where positive pressure is put to perfect use. Since your CPU heat sink fans will act as your exhaust fans, also the point of exhaust fans for the most part is for pushing air past the grills, since you have no grills, you don't need to worry about that

EDIT
I can see that there will be some room between the back of the computer mobo desk part and the wall, you could create a diagonal wall so that the air flow is guided out to the side of the desk. just as a suggestion. Also since there does not seem to be a side wall, you will have easy access to the IO port by walking to the side of the desk
   
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post #15 of 157
Thread Starter 
Quote:
Originally Posted by chinesethunda View Post
Actually, I just had a momentary stroke of awesomeness lol. Since you are in control of how this turns out, you could have 2-4 fans in the front, I am also going to assume you will have some sort of decent cpu heat sink which contains 2-3 fans, now my idea is (taken from ehume's thread somewhere) have NO rear exhaust fan, simply have an open cutout behind the CPU heat sink where the it is blowing out air, and then all the air pressure will be forced out the back, you could always cut out some smaller holes in varying places in the rear to make sure no hot air is trapped, which is a good idea. But this is a perfect place where positive pressure is put to perfect use. Since your CPU heat sink fans will act as your exhaust fans, also the point of exhaust fans for the most part is for pushing air past the grills, since you have no grills, you don't need to worry about that

EDIT
I can see that there will be some room between the back of the computer mobo desk part and the wall, you could create a diagonal wall so that the air flow is guided out to the side of the desk. just as a suggestion. Also since there does not seem to be a side wall, you will have easy access to the IO port by walking to the side of the desk

Yeah I have a Silver Arrow. Why don't I want fans blowing air at the bottom of the video card? I figure that would provide more cool air to the card.

I do like the idea, I'm still just concerned 6" of space between the wall and the IO shield won't be enough room to plug things in. You sure as heck won't be able to see any ports, you'd have to do it all by feel. Unless I glue a mirror in there lol.
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post #16 of 157
well 6 inches of space and however much room between the desk and the wall, You would still need room to feed cables to the monitors etc, unless you plan to have all of that within the confines of the desk like drilling holes through the desktop etc.

The reason you wouldn't need air blowing directly at your GPU is because with lets say 3 high cfm slow quiet fans like 3 200mm fans (or some big fan) blowing air from the front and going directly to the back, the fresh cold air will flow over your GPU. Since I don't see any hdd cages or anything blocking the motherboard from the front, air will travel directly from the intake to the GPU and out the back, clean uninterrupted air flow from front to back with nothing in the back to block it. no rear exhausts or grills to hinder air flow. This is no ordinary case where you have hdd cages and 5.25" bays and mess or wires etc blocking intake from CPU to exhaust, (this of course is assuming all of your other components like hdd, cd drive, PSU will either be under the motherboard drawer or at least the CD and hdd flat on the drawer in front of the motherboard and not really blocking the air flow.

As for the small room for plugging stuff in, you could always plug most of it in before you move the desk, I don't know what you would use it for but the only thing I foresee that would be difficult to plug in after the initial plugging in of everything would be USB and you could use a usb hub or something, or have a case USB thing connected to the motherboard
   
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post #17 of 157
Thread Starter 
Quote:
Originally Posted by chinesethunda View Post
well 6 inches of space and however much room between the desk and the wall, You would still need room to feed cables to the monitors etc, unless you plan to have all of that within the confines of the desk like drilling holes through the desktop etc.

The reason you wouldn't need air blowing directly at your GPU is because with lets say 3 high cfm slow quiet fans like 3 200mm fans (or some big fan) blowing air from the front and going directly to the back, the fresh cold air will flow over your GPU. Since I don't see any hdd cages or anything blocking the motherboard from the front, air will travel directly from the intake to the GPU and out the back, clean uninterrupted air flow from front to back with nothing in the back to block it. no rear exhausts or grills to hinder air flow. This is no ordinary case where you have hdd cages and 5.25" bays and mess or wires etc blocking intake from CPU to exhaust, (this of course is assuming all of your other components like hdd, cd drive, PSU will either be under the motherboard drawer or at least the CD and hdd flat on the drawer in front of the motherboard and not really blocking the air flow.

Yeah, nothing will be in the space with the motherboard, except the motherboard + fans. The PSU will be in the recessed area near the back, behind the mobo. Hard drives will be underneath the mobo, on the second shelf. DVD drive is external, and will also be on the shelf. I plan to route all wiring under the shelf with the motherboard on it.

This is the view from underneath looking up:




You can see the holes cut out for fan airflow are open to the outside air, and aren't enclosed. I designed it that way because I didn't want fans to be visible from the outside, nor did I want large circular holes cutout in the desk frame. Mostly in case I ever want to use the desk, as just a desk, and don't want large random holes in it lol.
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post #18 of 157
Okay I understand. You could also have the PSU on the second shelf as well to provide better cable management perhaps.

Being that you have the front part blocked off and only allowing a smaller recess where the fans intake air, it is probably a good idea to have 3-4 large fans intaking air and not box it, just leave a gap between the front of the mobo shelf and the front of the desk. Sadly I do not have autocad or inventor on this computer I am currently at or I would draw you a model of what I mean but I think you have it for the most part
   
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post #19 of 157
something like this, excuse my paint lol
   
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post #20 of 157
Thread Starter 
Quote:
Originally Posted by chinesethunda View Post
Okay I understand. You could also have the PSU on the second shelf as well to provide better cable management perhaps.

Being that you have the front part blocked off and only allowing a smaller recess where the fans intake air, it is probably a good idea to have 3-4 large fans intaking air and not box it, just leave a gap between the front of the mobo shelf and the front of the desk. Sadly I do not have autocad or inventor on this computer I am currently at or I would draw you a model of what I mean but I think you have it for the most part
I think I know what you're talking about, but I figured the box could serve two purposes. Mainly, it would be a place to mount the fans to. It would also obviously help channel the outside air through the fans, rather than the fans just sucking in and recirculating random ambient air from inside the case.

By the way, I used SketchUp for all this. Free, easy program to use

edit: I guess I didn't understand exactly what you mean, that drawing makes it seem pretty darn feasible. Hmmmmm... Also the width of the wood where the fans would go is 19". So it would be a PRETTY tight squeeze for 4x 120mms, and would only house 2x 200mms, or 3x 140mm.
Edited by Backfat - 8/6/11 at 8:45pm
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