TechPowerUp posted a review on the Sapphire Radeon RX 570 Pulse 4 GB
A quote from the article:
Pulse is a new graphics card series by Sapphire, which does away with some rarely needed features, in order to achieve better pricing. The Radeon RX 570 Pulse that we review today is only $10 more expensive than the RX 570 base price and still comes with a backplate and an overclock out of the box.Sapphire Radeon RX 570 Pulse 4 GB @ techPowerUp