Hello, thank you all for the advice getting 9000 stable. It was a lot of work, but I believe I have it. Here are the voltages.
VCC SA: 1.42
VDD2: 1.45
VDD/Q: 1.46
All other voltages are at stock/auto applied
CPU:
Ring Ratio 41
NGU: 34
D2D 36
GPU: RTX 5090 Vanguard undervolted at 2827 MHz at 895 mV
Cyberpunk Benchmark 1080p RT Low: 218.25 average, 183.87 min, max 253.79
Cyberpunk Benchmark 4k RT Ultra:125.89 average, 113.63 min, max 140.95. I could try to tune more but I am quite content with this. I hope you all enjoy!