AMD RX 6900 XT Extreme Edition vs. RTX 3090?

[Patricks]

I've been on the Nvidia wagon for many years but did use an AMD GPU many years back without issues. As the world has gone insane and you can't buy a 3090 for under €2500 i'm leaning toward a 6900 XT Extreme (self-contained water cooling) for about €800 less and available. Are there any reasons NOT to move to an AMD GPU? All test I have seen show it within 10% of the 3090 and much faster than my current 2080.. Thank you for any input!

[RedKestrel]

3 minutes ago, GPatricks said:

I've been on the Nvidia wagon for many years but did use an AMD GPU many years back without issues. As the world has gone insane and you can't buy a 3090 for under €2500 i'm leaning toward a 6900 XT Extreme (self-contained water cooling) for about €800 less and available. Are there any reasons NOT to move to an AMD GPU? All test I have seen show it within 10% of the 3090 and much faster than my current 2080.. Thank you for any input!

Apparently there is some kind of bug or lack of optimization with Il-2 for the AMD GPUs, so they don't perform as good with this game. 

Previously there was a big bug with AMD GPUs for the switch to deferred rendering - according to the Il-2 devs everything on their end was done according to proper specs but AMD wouldn't/couldn't fix whatever bug in their drivers was causing it, so the devs had to find a workaround. My own uneducated suspicion is that this or something like it may be causing this performance degradation.

[Patricks]

Well, I guess thats good news as I think Alexa was listening again, as soon as I wrote the post above I got a one day 25% off flyer for a Zotac Gaming GeForce RTX 3090 Trinity OC 24GB GDDR6X and pulled the trigger immediately. Couple hundred € more than the 6900 XT but I can live with that... be here in 2 days. 

Edited June 23, 2021 by GPatricks