Cabinet Fan size

[Volcruz]

Hey there
I have one 120 mm fan installed in my cabinet on the back side and i have holes for 2 more fans on the left side of the case but the screw spacing is some what odd and i can't figure out the fan size i need
10cm*8cm (screw space)
And 120 mm fan dosen't fit

 

[makkem]

Hi
How are you measuring the holes?
For instance a 120mm fan has hole spacings of 105mm horizontal,105mm vertical and 148.5mm diagonal.
Also what is the make and model of your case ?

 

[Volcruz]

Approx 105mm horizontal and 80 mm vertical
I don't know the model number i can't find it online

 

[makkem]

Since you say there are two fan positions ,what is the measurement between the top hole in the top fan position and the top hole in the bottom fan position ?
I assume they are one above the other.

 

[Volcruz]

The distance is 100mm and also the distance horizontally is 100mm not 105mm

 

[makkem]

So have you tried a 120mm fan to see if the holes line up to the 100mm x 100mm spacing.
This of course would only allow you to fit one fan.
If they don't line up then it looks like they are designed for some non standard fans as the next standard fan size below 120mm is 92mm which has a mounting spacing of 82.5 mm.

 

[Volcruz]

120mm fan didn't fit
I don't know why thry gave 2 fan slots with such uncommon size .
Is there anything else that can be installed here other than a fan?

 

[makkem]

The only other thing I can think of would be a water cooling radiator but they tend to mount the same as 120mm fans.
The strange thing is the 100x 80 spacing,as obviously fans are circular .
I wonder if it is designed for some sort of ducting.