As is the case with early releases, the HIS Radeon HD 5770 comes with ATI's reference cooler and PCB design. The design of the cooler follows that of the Radeon HD 5870, with two vents at the top end which helps suck in cool air to blow over the core. The HIS card also has ATI's reference clock speeds, which means 850MHz at the core and 4800 MHz DDR at the memory.
Like the HIS card, the PowerColor Radeon HD 5770 also sports ATI's reference cooler and PCB design. As such, the two cards look identical except for the stickers which the respective vendors have pasted on them. Expect performance to be the same too, because the PowerColor Radeon HD 5770 also sports ATI's reference clock speeds.
Here's what else you can expect from reference design Radeon HD 5770 cards: