What’s different? Well, it has absolutely no fan and the memory chips are relocated on the backside of the card.
The PCB is a clear departure from AMD’s Radeon HD 7770 reference design.
As we said, the memory has been relocated on the back of the card and the chips are cooled by a metallic plate that also gives the card an increased structural integrity.
There seem to be only four heatpipes running through the cooler, but Sapphire is confident that those are enough to cool a fully fledged AMD Radeon HD 7770 GPU.
Fanless AMD Radeon HD 7770 1GHz Graphics Card from Sapphire
This is a powerful mid-end solution that works absolutely silently
Sapphire's Fanless AMD Radeon HD 7770 1GHz video card (4 Images)
Halo: The Master Chief Collection 20 GB Day One Patch Eliminates Need for Second Disc, Developer Claims
... so hot right now