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Add a 120mm?

post #1 of 14
Thread Starter 
Hello people, thanks for checking out this thread. it wont take much of your time.

I have Fairly small fans. An 80mm intake, and an 80mm exhaust. There is no room on the chassis to cut larger holes, due to where other things are attached.

I have a large vent on the side panel, that looks like lots and lots of holes have been made in it. On the other side of this there is a cone attached to my P4's stock heatsink, which sits very close to the side panel. This is to draw cold air through the heatsink, rather than reusing warm air. With the cone my temps are 5c+ warmer.

I was considering trying to screw a 120mm fan onto the side vent. It isnt made for a fan, but i was thinking if the holes line up well, i could fit one. This would mean removing the cone from the HS, and having the 120mm fan suppling the HSF and case with cool air. I think this would improve temps, as it would blow cool air onto the mobo as well.

Here is a pics. I'll try and get a better ones tomorrow when its morning, and i can find the camera. This was taken with my phone. I also included a diagram of my fan layout.

Side vent

Fan layout.
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post #2 of 14
Sounds like a good idea, it sure wouldn't hurt to try it and see how your temps are. I think you'll see an improvement in your CPU temps.
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post #3 of 14
Definatley give it a try, i have a fan mounted on my side panel that had similar holes... Only one screw lines up, but hey, it holds it in place and lowers temps....lol
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post #4 of 14
Thread Starter 
Thanks for the encouraging words guys

Can some1 with a 120mm fan give me EXACT measurements of the distance between the holes of fan? I know from 1 edge to the other is 120mm, but i need to know where the holes are to see if i can fit 1 to the side panel.

IE. the distance of this:



I might be wrong, and the distance might actually be 120mm between the the holes (from the CENTRE of each hole).

I need to know EXACT though, as if the holes on the vent aren't the same distance apart the fan wont fit, and im NOT cutting my case, so dont tell me to.

(the vent isnt there to add a fan on, but i want to if i can. hence its not specially made for a 120mm to fit)

I need the answer tonight, so i can pick up a fan from PC world tomorrow (loathesome place) or i might have to get one packaged with my 7900, so i only have to pay delivery once. (or rather not at all. free delivery on my 7900GTX due to the on going delay )
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post #5 of 14
The holes are about 105-106mm apart center to center of the holes...

You only really need one hole to hold the fan inplace. Two preferably, but one will hold the fan.... so measurments dont really mean anything.
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post #6 of 14
A method I use.
1. Secure the fan in the location desired.
2. Scribe the screw holes with an awl or a sewing needle
3. make a punch mark in the center of the holes and drill
Oh, preferably from the inside
A little trick to debur the holes, use a larger drill bit but twist it manually.
    
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post #7 of 14
make sure to have pretty much equal air flow coming in as going out. A neutral pressure system is usually the best. But i dont go by those rules. I dont even have a fan on my side vent. I just have a 120mm blowhole that pulls air through the hole on the side.
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post #8 of 14
If you dont want to drill the holes, you could also use zip ties, though they may not secure it tightly enough and it could vibrate against the side panel....
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post #9 of 14
Thread Starter 
Due to the pattern of the holes, i think i could fit any size fan to that vent, if i moved it about a bit. Gonna ride down to PC world tomorrow then and grab a 120mm Akasa crystal blue fan. The extra cool air inside the case should help my CPU and GPU temps ALOT. ATM i have a 4000rpm 40+cfm 80mm exhaust, but the 80mm intake is only 2000rpm 25cfm, and the flow is somewhat disrupted by a number of small cables. The 120 blowing over everything should give me a good temp drop. hopefully upto 10c

My case is noisy enough, lol. Especially when the CPU fan whinds up. Sounds like a bloody hover craft. I have a 120mm that pulls air into the PSU and a 80mm the pushes it out of the PSU, out the back of the case. (120mm on bottom of PSU). My 80mm exhaust and a weak intake. Plus a slightly positive case pressure would be better, it would reduce load on the exhaust fans (making them quieter), and it would make more air flow out of the case. negative pressure means air would try to get in the case. I was considering modding 3x 40mm fans onto my 2nd drive bezel like some1 else did, but it looked too messy, and my 2nd drive bay is filled with cables anyway, so little/no air flow. I just leave the front off the bay, so some warm air can vent.
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post #10 of 14
Quote:
Originally Posted by noxious89123
Thanks for the encouraging words guys

Can some1 with a 120mm fan give me EXACT measurements of the distance between the holes of fan? I know from 1 edge to the other is 120mm, but i need to know where the holes are to see if i can fit 1 to the side panel.

IE. the distance of this:



I might be wrong, and the distance might actually be 120mm between the the holes (from the CENTRE of each hole).

I need to know EXACT though, as if the holes on the vent aren't the same distance apart the fan wont fit, and im NOT cutting my case, so dont tell me to.

(the vent isnt there to add a fan on, but i want to if i can. hence its not specially made for a 120mm to fit)

I need the answer tonight, so i can pick up a fan from PC world tomorrow (loathesome place) or i might have to get one packaged with my 7900, so i only have to pay delivery once. (or rather not at all. free delivery on my 7900GTX due to the on going delay )
LMAO, how did you come up with 197mm?
Good idea, but have both the 120mm case fan, and the CPU fan blow air to the CPU, not aimed at each other

Not -
(CASE PANEL) {FAN BLOWS THIS WAY} ---> <---{FAN BLOWS THIS WAY}(CPU)
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