I think if you really want to use the rtx 3xxx cards you're gonna need to upgrade EVERYTHING in your PC. You'll want a PCI-E 4.0 motherboard, an M.2 SSD, much faster and more ram, a top end CPU, otherwise something will bottleneck it.
That is going to be prohibitively difficult if you use Intel hardware. Even if you have a K skew CPU AFAIK there chipset support on the current Z490 is spotty at best. AMD have PCIe Gen 4 support on the CPU at the moment right? I forget the hardware race is getting a bit much for me to follow and retain everything I read