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 are an absolute wash when comparing the Gigabyte 5600 XT to the Sapphire Pulse 5600 XT, the slight difference in score between the two doesn't even amount to a single percentage point.