The RTX 4090 outperforms the RX 7900 XT by 30%+ in ray tracing and DLSS scenarios according to RTINGS and Tom's Hardware data while offering 4GB more VRAM. The RX 7900 XT counters with lower power use and stronger non-RT 1440p results per Notebookcheck. This is a close call only if ray tracing is not required.