Good morning everyone.
 

I have a question about GPU clearance inside my Enthoo Primo case for the upcoming Asus ROG Strix 4090 OC Edition video card. The dimensions for this card is the following.
 
 
 

 
 
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Phantek site states the following clearances for my PC case (Enthoo Primo).
 
 
 
 

 
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Here are some pictures of the inside of my case, pardon the dust. As you can see I only measure about 13.5 inches of clearance for the GPU (Currently have my 3080 installed). How do I remove what I outlined below in orange?? The Asus GPU is 14.078 (357.6 mm) inches and won't fit from what I am seeing even though the case is supposed to support more than that. I don't have HDD cages installed, or the reservoir bracket. The 4090 will hit the metal part inside the case that I outlined. Any help would be appreciated, thank you.
 

 

 

 

 
 

You have 3 options

1. Customize the case
2. Buy a compatible side GPU bracket
3. Buy a new case that will fit in it (my recommended choice)

The strix's 149.3mm might bite you. I believe the 149.3mm includes the pcb slot connector but you have to account for the power connector and bend that will need to make.
 
I cant find a gpu width clearance for the Enthoo Primo anywhere, just length. from images it looks like it should make it tho.
 
*EDIT*
 
nvm the Enthoo Prime is a thick boi. i dont see an issue. looks like your have atleast 2" of clearance.

 
1) Cutting was done with an empty case.   I had some rags under the work area to catch most of the cutting oil & chips.  Then a detailed cleaning of the case, before reassembly of MB as in picture.


2) I used a Nibbling Tool (the style in the link (not the same brand) it gives you good maneuverability in tight spaces), use some cutting oil, to make it cut easier & the tool's cutting edge will last longer (you could use WD40 - better than nothing)


3) Might have also used a mini hacksaw (one of those small handles that holds the blade, inline) & file for cleanup - (Best I can remember, after all we're talking about 5.5 years ago)
 
I decided not to use an abrasive cutting wheel.  All the time to tape & cover the rest of the case - to protect it from sparks.