Alphacool ES Geforce RTX 4090 compatibility

AquaCBR

New member
Hi everyone - I know this question has probably been asked before but I cant seem to find anything specifically on this. I purchased a 4090 ES waterblock (https://www.aquatuning.com/en/water...orce-rtx-4090-reference-design-with-backplate), and have just received my Inno3d X3 OC 4090 (https://www.inno3d.com/en/PRODUCT_INNO3D_GEFORCE_RTX_4090_X3_OC) only to find out that the board design looks like the one that is not compatible (the bottom on in this pic - https://gpu.alphacool.com/gpu/extra/29_0.jpg). This is very frustrating as this is impossible to tell when ordering online!

Does anyone know why this pcb layout is not compatible and does anyone know if there is any way to modify the block or card slightly to make the waterblock fit or is my only option to return it and try and find a card with the right board layout? I understand that modifying the block or card would void my warranty (as does probably taking off the stock cooler!), I am just wondering if it is just a small foul or something more fundamental.

I have also emailed Alphacool but thought the community may know, as I only have 7 days to return the current card.

Thanks for any insight people can provide!
 

Vanzin

Support
Staff member
HI,

the problem that the GPU is not compatible is that the PCB is slightly longer and is interfering with the terminal. This is causing that the PCB will bend and can be damaged.
1692341853271.png
 

AquaCBR

New member
Thank you so much for your quick response, please disregard my email enquiry!

Looking at the design of the ES waterblock, while I am sure you don't recommend it, do you think it is possible to use a spacer to push the terminals out just a bit (say 5mm) and clear the pcb?

Obviously this will introduce another 'leak' point but it feels like that would fix the interference problem?
 

Vanzin

Support
Staff member
Hi,

Since you have O-Rings on the terminal something like this won´t work. THe only solutions you have, is to hope that you get a GPU from a different batch, where Inno3D didn´t use the longer PCB or use a different water block from us. Only the ES Version is not compatible with this PCB. THese water blocks would work with this PCB.
 
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