Powercolor non-reference HD 4890 will ship with core/memory clock of 980/1100MHz, up from 850/975MHz on reference model. Powercolor has opted Zerotherm cooler with 3 heatpipes and high-density cooling fins. The nickel plating technology can effectively prevent oxidation. Besides, the MOSFET and DRAM are both covered with copper cooling ribs to realize maximum coolness.
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