The RTX 5080 outperforms the RTX 4090 in efficiency and new features according to early benchmarks from Tom's Hardware and AnandTech. The 4090 still delivers strong 4K results but consumes more power at 450 W versus the 5080's lower TDP. RTX 5080 wins on future-proofing with DLSS 4 while the 4090 remains viable for users avoiding upgrades.