Modular ITX/DTX/mATX/ATX/EATX/SSI-EEB/SSI-CEB/XL-ATX mainboard frame/tray

prusaprinters

<h3>A simple modular PC mainboard frame/tray system intended for open-air or custom enclosure PC builds.</h3><h3>Versions:</h3><ul><li>v1.1 initial design concept</li><li>v1.2 adds SSI mounting holes and recesses the landing pads for frame mounting screws and clarified part inscriptions</li><li>v1.3 matx updated to be 4 pieces to print on 200x200mm printer</li><li>v2 corrects hole sizes, restores missing standoff hole on atx2 part, 0.25mm filets added to all edges</li></ul><p>&nbsp;</p><h4>Required parts:</h4><p><br>- **mini-ITX/mini-DTX**<br>&nbsp; &nbsp;1 print (itx.stl)<br>&nbsp; &nbsp;4 motherboard standoffs<br>&nbsp; &nbsp;4 screws to secure the frame<br>- **DTX**<br>&nbsp; &nbsp;2 prints (itx.stl &amp; dtx.stl)<br>&nbsp; &nbsp;2 nuts/bolts + 4 washers to fasten parts together<br>&nbsp; &nbsp;5-6 motherboard standoffs<br>&nbsp; &nbsp;4 screws<br>- **micro-ATX**<br>&nbsp; &nbsp;4 prints (itx.stl, dtx.stl, matx1.stl, matx2.stl)<br>&nbsp; &nbsp;4 nuts/bolts + 8 washers to fasten parts together<br>&nbsp; &nbsp;5-8 motherboard standoffs<br>&nbsp; &nbsp;4 screws<br>- **ATX**<br>&nbsp; &nbsp;4 prints (itx.stl &amp; dtx.stl, atx1.stl, atx2.stl)<br>&nbsp; &nbsp;5 nuts/bolts + 10 washers to fasten parts together<br>&nbsp; &nbsp;7-10 motherboard standoffs<br>&nbsp; &nbsp;4 screws<br>- **EATX** (SSI-CEB/SSI-EEB/XL-ATX)<br>&nbsp; &nbsp;6 prints (itx.stl &amp; dtx.stl, atx1.stl, atx2.stl, eatx1.stl, eatx2.stl)<br>&nbsp; &nbsp;7 nuts/bolts + 14 washers to fasten parts together<br>&nbsp; &nbsp;9-15 motherboard standoffs<br>&nbsp; &nbsp;4 screws</p><p>&nbsp;</p><h4>Notes:</h4><p><br>- Accepts standard motherboard standoffs. Holes are 3.25mm in diameter gradually tapering to ~2.3mm to grip the standoffs. This may be adjusted in future revisions.<br>- Extra holes are added to accommodate SSI-style boards in addition to ATX style boards<br>- 10mm z-height - combined with ~6.4mm motherboard standoffs provides ample clearance for PCI card tabs<br>- Can use a variety of fasteners to attach the frame parts together for ATX/EATX and/or secure the frame to a surface or custom chassis. Fasteners can be up to ~4mm in diameter. Washers should be used to spread the load against the plastic.<br>- PETG recommended for durability/flexibility, but PLA is OK. For environments where air temperature exceeds 60°C, ABS is probably a better long-term material.<br>- Most 3D-printed materials are non-conductive and can build-up static charge. I doubt its necessary, but to mitigate static, insulated ~28awg wires terminated with spade connectors can be run between a few motherboard standoffs and then grounded to the power supply.&nbsp;</p><h4><br>References for motherboard sizes and standoff locations:</h4><p><br>- https://web.archive.org/web/20160817033942/http://www.formfactors.org/developer/specs/atx2_1.pdf<br>- https://www.snia.org/sites/default/files/SSIF/2018-05-31/SSI%20EEB%202011%201.0.1.pdf<br>- https://digitallibrary.intel.com/content/dam/ccl/public/600565-btx-specification-update-rev1p1.pdf<br>- https://linustechtips.com/main/topic/812415-ee-atx-standoff-locations/<br>- https://www.gamersnexus.net/guides/3566-e-atx-is-a-lie-vs-xl-atx-eeb-ceb<br>- https://en.wikipedia.org/wiki/ATX#Variants</p><h4><br>To-do:</h4><p><br>- Add SuperMicro EE-ATX<br>- Add SuperMicro SWTX<br>- Add SSI-MEB</p>