To run more than one Lightning card you need to remove the GPU reactor module. Kinda sucks but its really not needed anyway.
An in-depth look at the ASUS ROG Crosshair X870E Hero MotherboardSilverStone FARA 514X High Air Flow Case ReviewDragon Age: The Veilguard Handheld Performance @ TechPowerUpEndorfy Arx 700 ARGB Computer Case Review @ APH NetworksAorus X870 Elite WiFi 7 Motherboard ReviewThermaltake Launches New AI-Enhanced Gaming Desktops with Intel Core Ultra Series 2 Processors for Unmatched PerformanceG.SKILL DDR5 Used By Overclockers To Achieve 12,000 MT/s Overclocking Milestone with ASUS ROG Maximus Z890 ApexMicron SSDs Qualified for Recommended Vendor List on NVIDIA GB200 NVL72Intel Core Ultra 9 285K @ TechPowerUpCore Ultra 245K/265K/285K Processor and Z890 motherboard reviews @ Guru3D