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Rear IO, ATX, mATX, mITX Drawing spec for custom computer cases.

post #1 of 10
Thread Starter 
I am looking for feedback for users experienced with custom cases, I want to make sure that my drawing is correct and that im not missing anything. Here's the drawing free to use by anyone.
The reason I made this drawing was because similar drawings had different measurements that didn't match other specs.

Full Quality



Resources:

ATX 2.2 Spec

PCIE CEM 1.1

mATX 1.2 Spec

mITX 2.0 Spec

Edit: this drawing has issues.
Edited by SaintsEnd - 1/26/16 at 2:46pm
post #2 of 10
The openings for the PCIE cards is too small. Should be ~15mm and thus the separators ~5mm
post #3 of 10
Thread Starter 
Quote:
Originally Posted by Spotswood View Post

The openings for the PCIE cards is too small. Should be ~15mm and thus the separators ~5mm

Do you have any documentation to support this? The area for IO in the PCIe CEM 1.1 spec (page 73 figure 6.2) gives an IO connector opening of only 12.06mm by 89.9mm and anything outside of that is not considered safe space. Additionally just checking my computer, it has an opening of about 13mm (from what I can inaccurately measure myself.)

Thanks for the help!
post #4 of 10
No spec. just a real world example (I actually laughed out loud when I saw that drawing in the spec you cited).

I have an IO plate from CaseLabs and the openings are 16x115 and start 5mm above the IO cutout.

I would recommend using a plate from either CaseLabs or MountainMods. thumb.gif
Edited by Spotswood - 1/16/16 at 7:18am
post #5 of 10
Thread Starter 
Quote:
Originally Posted by Spotswood View Post

No spec. just a real world example (I actually laughed out loud when I saw that drawing you cited).

I have an IO plate from CaseLabs and the openings are 16x115 and start 5mm above the IO cutout.

I would recommend using a plate from either CaseLabs or MountainMods. thumb.gif

I am trying to follow the actual specifications. Whats funny about that? You may need that opening size for different types of add-on cards (Im assuming) but as the drawing is showing, this is for pci-e and I am trying to learn. Real world examples are not going to help here as a) I'm not buying any parts, everything will be custom fabrication and b) the CNC router or laser engraver I am going to use is accurate enough that exact measurements are very useful for my final design. I hope you will understand why I am not going to go to take this comment into consideration considering if I was worried I could take the obvious action myself of overextending the opening like the bracket you have suggested has done.

That said I appreciate the criticism. smile.gif
post #6 of 10
My laughter came from realizing that nobody follows the spec. More real-world info is in here: http://www.protocase.com/pdf/How_to_design_enclosures_for_motherboard_based_systems_092010.pdf
post #7 of 10
Thread Starter 
Quote:
Originally Posted by Spotswood View Post

My laughter came from realizing that nobody follows the spec. More real-world info is in here: http://www.protocase.com/pdf/How_to_design_enclosures_for_motherboard_based_systems_092010.pdf

I don't find it funny, but thats because I have been spending alot of time sifting through many resources with so many different measurements... and the only official one I have is this pci-e 1.1 cem spec because all of the other ones have to be bought from pci sig for absurdly large amounts of money.

I'll deffinatly read that document thanks. smile.gif
post #8 of 10
Quote:
Originally Posted by SaintsEnd View Post

I don't find it funny, but thats because I have been spending alot of time sifting through many resources with so many different measurements... and the only official one I have is this pci-e 1.1 cem spec because all of the other ones have to be bought from pci sig for absurdly large amounts of money.

I'll deffinatly read that document thanks. smile.gif

If you can make an accurate drawing it woul be very useful.

I found it difficult to work out the spec from drawings I found and ended up measuring my Liam li tray with a vernier in the end, might no be exactly to spec but it works fine.

Good luck.
post #9 of 10
Thread Starter 
Quote:
Originally Posted by Holst View Post

If you can make an accurate drawing it would be very useful.

I found it difficult to work out the spec from drawings I found and ended up measuring my Liam li tray with a vernier in the end, might no be exactly to spec but it works fine.

Good luck.

I'll post here when I have verified the drawing. I'm trying to contact a few companies to see if anyone will help with the proper expertise. Maybe I'll get lucky?
post #10 of 10
Thread Starter 
Here is a guide to the finished, accurate to a hundredth of a mm drawing
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