Original Post — Direct link

Decided to play some D2 after having a long pause from it, Downloaded, Fired it up, In DX11 mode it works perfectly, Switch to DX12 mode and the performance drops like a brick, No clue why.
Steps taken so far -

-All system drivers up to date i.e GPU, Motherboard etc...
-Windows fully up to date
-Verified the game install
-Tried with overclock and without an overclock

I thought it could possibly be an issue with Intels 12th Gen Alderlake so I applied the compatibility option in the bios which disables the e-cores, Still the same low performance in DX12, This is the only game I have performance issues with, All the Assassins Creed games work perfectly, Same with Ghost Recon etc....

Screenshots showing the performance difference, Metrics in the top left -

DX11

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DX12
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13 days ago - Ubi-Karl - Direct link

Hey @Dicebackup, thanks for getting through to us and apologies about the delayed response from our team.

I can see that other community members have shared some steps to try, which is great to see, however I would like to also share this performance article we have, which should help you to improve the performance with DX12.

Should issue persist or if you have any further queries, do not hesitate and reach out at any time!