Radeon 9070 XT Performance Much Worse Than 7900XTX

I'm using project server to store all my projects so they can be edited from both of my workstations.

System 1 - Ryzen 7950x3d, Radeon 7900XTX (Driver 2024.12.1) , 64GB RAM, 2TB Gen 4 SSD
System 2 - Ryzen 9950x, Radeon 9070XT (Driver 2025.3.1) , 64GB RAM, 2TB Gen 4 SSD

Studio version 19.1.4 is on both systems

All project data is stored on my NAS and both systems access it in the same way.

System 1 took 7:07 and System 2 took 22:44 to render the same project.

System 2 even has a new GPU driver but performance is much worse.

The footage is 4K/60fps (variable frame rate) /HEVC shot on an Iphone 12 Pro.

Why is System 2 so much slower rendering the project?

Could be drivers.

But, the 9070XT is a lower tier card (its a mid level card) with worse bandwidth and compute.
960GB/s vs 640GB/s and 64TFLOPS vs 40something FP32 on the 9070XT.

Depending on what you do in said project, those could matter.

Also variable framerate is not Resolve friendly, you should convert that, before editing, to constant.

I'm using project server to store all my projects so they can be edited from both of my workstations.
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Why is System 2 so much slower rendering the project?

To answer that question you first need to answer is it systems or is it "networking" that is impacting you. Move your project locally to each system, render again, and then compare times.

It's definitely not networking. I monitored network performance on both systems and it was not bottlenecked.

Based on PugetSystems benchmarks, I expected much closer performance between the two cards.

I'm using project server to store all my projects so they can be edited from both of my workstations.
...
Why is System 2 so much slower rendering the project?

To answer that question you first need to answer is it systems or is it "networking" that is impacting you. Move your project locally to each system, render again, and then compare times.

Exactly could be a faulty cable going from 1000 > 10/100. Also if on Windows open task man and monitor resources and compare

Yes I have monitored network performance in windows task manager and it never came close to saturating a gigabit link. Max I saw was about 200Mb

I stand corrected, it must be something about the network speed. Even though it never came close (according to Windows Task Manager) to saturating the gigabit network speed, bring the project local make the project render in about 9 minutes on the 9070XT.

My other system has a 25Gb direct connection to the NAS, which according to task manager, never exceeded 200Mb of usage.

I also noticed that power usage on the 7900xtx is typically higher during the export. Usually between 150 and 200 watts, but as high as 350 watts. The 9070XT typically runs around 100 watts.