i see most 9070 needs 850w and above, most likely, need change psu too.
btw heard from my fren that 9070 will be boost if i am on amd ryzen build
using intel system is perfectly fine?or should i get a 5070 or 5070ti?
Depend which game you are playing.
RX9700 only issue if you ask is it require 3 X PCIE Connector.
Which unfornuately these days most modern PSU only comes with either 2+1 PCIE Connector.
PSU with 3 X PCIE Connector can be hard to find one.
If you consider RTX 5070 recommend to change PSU as it uses the newer 12vhpwr.
It really depend on your budget but these days RAM, SSD and GPU prices are high
due to shortage of RAM.
With ongoing conflict the situation will get even worse.
If you don't want to spend too much $, I recommend you find a used RTX 2080
which will be more faster than RTX 2060.
RTX 2060 nowadays is counted bare minimum.
I myself still uses a dated i9 9900k RTX 2080 Ti to play most of the games whether old or modern.