3DMark Fire Strike is a showcase DirectX 11 benchmark designed for today’s high-performance gaming PCs. It is our [FutureMark’s] most ambitious and technical benchmark ever, featuring real-time graphics rendered with detail and complexity far beyond what is found in other benchmarks and games today.
3DMark scores aren't hugely increased compared to the RTX 3080. Fire Strike sees the Gigabyte RTX 3090 Eagle OC improve on the 3080 Founders Edition by 11%, though this increases to 13% for Time Spy, and then 16% for Fire Strike Ultra.