@vidalv – to give you some ideas 
Years ago, I got a Lenovo W 520 – to serve me a long time as well to replace my ancient desktop. While this portable workstation is extraordinary serviceable (RAM, HD/SSD, Drive bay …), I can’t exchange the additional graphic card. With the fan always going full speed, I finally decided for a new custom built machine. – This big tower is serving me 4 years now and I wouldn’t hesitate a moment to get the very same with a new graphic card.
→ PL4 computer specs compared to PL3? - #38 by Wolfgang
→ Getting the PCspec right - #3 by Wolfgang
With calculating, don’t forget a good monitor – your interface to the digital world.
BTW, I have no idea about Win11, but will keep my Win10 system running as long as possible!