Question Upgrading to a new GPU, using an older system

[Christopher127]

Hi guys, I would greatly appreciate any expertise for my issue, thank you so much!

I have a Z370 motherboard with a 8700k CPU, a 1200W PSU(from 2016), x4 RAM 16GB 2400 speed and a 980ti GPU and I want to upgrade my GPU to a 4070 Super.
My worry is that it may not be that simple, to just put a 4070 super in my system so here are my questions:
1. Will my motherboard work well and not hinder any performance for the 4070Super? Or should I upgrade my MB/CPU too.
2. Will a Z370 motherboard with PCIE 3.0 lower the performance of the 4070 super that has PCIE 4.0?
3. I have a Corsair 1200W PSU from 2016, should I get a new PSU for the 4070Super(incase psu is too weak for the gpu) or just a new PSU in the event my current PSU blows up or dies?

And please feel free to give any complete advice for my system as I am willing to upgrade the Motherboard and CPU and RAM and PSU to have the best experience and safety as I do have a old PSU for sure.
Main point is I only want to upgrade my GPU, but if I need to consider other things please let me know.

Cant wait to hear from you, cheers.
Chris

 

[thestryker]

First of all a lot is going to have to do with resolution and refresh/frame rate target which you don't mention.

1) Your CPU will be a limiting factor with the video card, but depending on resolution it may only be minimum frame rates that you'd notice it on. This doesn't mean that you wouldn't get a big improvement over what you have video card wise just that of the CPU/GPU the CPU would be the weak spot.

You might consider getting some faster memory for that system, but if you're thinking of upgrading anyways I'm not sure it'd be worth investing in.

This article is the closest think you'll find to giving you an idea as to the performance (the RTX 4070 Super is a bit faster than the 3080): https://www.tomshardware.com/pc-components/gpus/cpu-vs-gpu-upgrade-benchmarks-testing

2) If it's lower at all it would be single digit percentage and not in every title

Here's an article that should give an idea for you: https://www.techpowerup.com/review/nvidia-geforce-rtx-3080-pci-express-scaling/

3) It depends on the exact model of PSU. If it's one that actually came out in 2016 you're probably fine. It won't have all of the latest protections, but it's so overkill wattage wise it would be able to handle 200% power excursions from the video card without issue.

Overall I think it would be smart to wait on a platform upgrade as AMD's 9000 series are right around the corner and Intel's Arrow Lake should be by the end of the year. AMD is also releasing new chipsets this fall with some different base features and will likely have X3D 9000 series in the next 6 months or so.