Sapphire presented a brand new graphics card in order to compete with the Geforce GTX 760 ITX, which is currently sold by Asus and MSI. Based on the new 28nm Tonga GPU, Sapphire created an R9 285 which is small enough to fit in most PC cases.
The new Sapphire R9 285 ITX Compact Edition is 17cm long, 11cm tall and it takes up two expansion slots. As far as ventilation is concerned, it features a single 100mm fan which blows directly on an aluminum heatsink. The board features two 6-pin PCIe connectors, but you can also use the 8-pin to two 6-pin adapter which is included in the bundle. Outputs wise, it features two mini-DisplayPort 1.2, an HDMI 1.4a, and a dual-link DVI outputs.
Furthermore, this is the very first R9 285 featuring a dual-BIOS option with a switch. This switch lets you choose between a UEFI-ready BIOS, featuring UEFI GOP drivers, and a legacy BIOS. Switching the BIOS will not have any effect on the clocks, which are set at 918MHz for the GPU, and 5.5GHz for the memory. Sapphire should also be working on an OC Edition of this card, with a 928MHz base clock on the GPU. Based on the 28 nm "Tonga" silicon, the R9 285 features 1,792 GCN 1.1 Stream Processors, 112 TMUs, 32 ROPs, and a 256-bit wide memory interface, which holds 2 GB of GDDR5 memory on this card.
Source:
Techpowerup.com