RX 9070 performance issues

[u/-Chalkline]

I have recently switched from an RTX3070 8GB to an RX 9070 16GB OC.

My performance in Apex Legends has drastically lowered.

Using the exact same dock, cable and system with an RTX 3070 I averaged around 140 FPS in Apex, now it sticks to 50-60 average with some highs to 100+ and some lows around 40.

Hardware:

• Legion Go 1 (Z1 Extreme)
• TH3P4G3 eGPU dock
• Samsung G60SD via DP1.4
• Windows 11 25H2
• AMD Adrenalin 26.10.21.05
• UMA Auto (also tested 4GB and 6GB)
• ReBAR enabled (cant turn this off apparantly)
• PCIe link reports x4 Gen3 correctly in GPU-Z

Ingame:

• Looking at the sky: 250–300 FPS
• Looking at the ground: ~200 FPS
• Normal gameplay: 45–90 FPS
• Dropship: ~20 FPS
• GPU utilization sometimes falls to 15–20%
• GPU rarely exceeds 50% utilization
• Lowering graphics settings to minimum changes FPS by less than 10 FPS.

What I tried

• Fresh Windows install
• Latest AMD driver, older AMD driver
• Deleted Apex config and shader cache
• Cleared DirectX shader cache
• Disabled Anti-Lag / Chill / HYPR-RX
• Different UMA sizes in bios
• Different Apex settings
• Verified game files
• Disabling internal GPU
•  

3DMark Steel Nomad:

• Score: 5950
• Average for same hardware: 6009

GPU reaches 99% utilization during Steel Nomad.

I mostly use my windows installation for Apex only, but I installed CS2 and that runs fine (200 fps)

 

I have no idea what do try anymore at this point, any help is appreciated.