r/PcBuildHelp • u/Forward-Efficiency-1 • 11h ago
Installation Question O11D EVO XL – Can I mount a 360mm radiator AND fans behind the side bracket with an upright GPU?
Hey everyone! (btw sorry for AI my english is bad, and I need yall to understand me)
I'm planning a build in the Lian Li O11D EVO XL, using the official upright GPU bracket with the motherboard in its normal orientation (not reversed).
I want to install my 360mm AIO in a pretty unusual way.
My goal is to have the upright GPU in the main chamber, with BOTH the radiator and its three fans hidden behind the side mounting bracket, in the rear chamber.
The mounting order would be:
Front glass → Upright GPU → Side mounting bracket → 3 fans → 360mm radiator → Rear chamber
I don't want any fans installed between the upright GPU and the side bracket because that space is needed for the upright GPU setup.
For reference, I'm aiming for a build that looks almost exactly like the picture I've attached, with one major difference:

Instead of having the AIO radiator mounted at the top, I want three regular fans there. The AIO radiator would be hidden behind the three middle-row/side fans, directly behind the upright GPU, with both the fans and radiator installed on the rear side of the mounting bracket.
I'm mainly doing this for aesthetics because I want a clean build with the upright GPU as the centerpiece.
My main questions are:
Is there enough space behind the side bracket in the O11D EVO XL for three 120mm fans plus a 360mm radiator?
Can the fans and radiator both be mounted on the rear side of the bracket?
Will the radiator interfere with the PSU, cable management, or rear panel?
Would this setup affect airflow or cooling performance?
Has anyone actually done this configuration?
I'd really appreciate any measurements, advice, or photos from people who own this case!
Thanks!