TechPowerUp published a review on the HyperX Pulsefire Haste 2
A quote from the article:
With the Pulsefire Haste 2, HyperX not only gets rid of all holes while keeping the weight at just 53 g, but also adds true 8000 Hz polling. In addition, the Pulsefire Haste 2 comes with the latest HyperX 26K sensor, HyperX main button switches rated for 100 million clicks, pure PTFE feet, and an improved cable.HyperX Pulsefire Haste 2 Review