NOTE: THE PICTURES OF THE PRINT ARE THE FIRST ITERATION, NEW ONE IS IMPROVED, no pics however
It holds a dual slot graphics card, holes may need some drilling afterwards.
You will want to print it with the big triangle side on the bed. At least that is how I did it and it came out very nice.
Also resolution is not super important, on the Markforged I used I cant make it bigger than .2mm.
I originally used fiberglass embedded in here (markforged thing), so printing with say ABS or something will be weaker. But it should still work fine. You will want supports for the the I/O slots, or not if you're that good.
I have a screenshot of the thing I got the slots from, for the life of me I cant find where I got it from.
Found a Bitcoin Mining test bench on here and cut out the entire model except for the two PCIe slots I needed and then built off of that. Finished it up in SolidWorks.