thnx for the replies,

Well I was trying to get my hands on a rtx 3080 for cyberpunk 2077 since december 2020. So that was the main purpose for e new gfx card. But since the 3060/3070/3080 are hard to come by and the 3090 are in stock in my country i decided to buy a 3090 and also use it for mining now and then (at least that is my idea), its just trial and error for me for the mining part.

I want to buy this one:

https://www.alternate.nl/EVGA/GeForce-RTX-3090-FTW3-ULTRA-GAMING-grafische-kaart/html/product/1673531

OR

https://www.alternate.nl/INNO3D/GeForce-RTX-3090-iChill-Frostbite-grafische-kaart/html/product/1693868

The calculation about energy costs and hashing power and the avarage profits you can take, ive alleady calculated it generally for myzelf.

The question was more about does it really matter which 3090 you are going to buy If u want to mine (X)coins, are there any technical differences between those 3090 card in mining profability or cant you really go wrong with buying 1 of these 3090's anyways.

And a new powersupply (1000W) is going to be bought as well..