GTX 1070 - RX 6750XT Upgrade? - CPU Bottleneck? Dual Fan vs Triple Fan?

I am looking to replace my GTX 1070 with a XFX AMD Radeon RX 6750 XT Triple Fan 12GB GDDR6 PCIe 4.0 Graphics Card

These are my current specs for my PC. I use a 2560x1440 monitor with 165 hz refresh rate. It is a Powerspec G315 PC.

I have a few concerns...

1) Will my i5 8600k processor bottleneck that 6750XT GPU? Will it inhibit me in any way in terms of FPS/Graphics? Helldivers, Marvel Rivals, Fortnite, etc.

2) I only have a dual GTX 1070 GPU fan currently. Will my old case be able to fit this 3 fan GPU inside? I just don't have any more of this info available online for my old PC. Should those old cases be fine?

3) Do I need to be concerned about an outdated power supply cable? Are there any factors I would need to consider before buying and installing myself?

*I will be spending a lot more down the road to upgrade all components of this PC. Right now, I am looking for something temporary that will meet my needs.

All help would be appreciated. Thanks!

  • Intel Core i5 8600K Processor 3.7GHz
  • NVIDIA GeForce GTX 1070 8GB GDDR5
  • 16GB DDR4-3000 RAM
  • 250GB SSD+1TB HDD
  • Microsoft Windows 10 Home
  • ASUS 24x DVDR