[h]Powercolor Radeon R9 285 - Overclocking[h]
Using MSI Afterburner, we first pushed the card's power limit to its maximum of 120%. No voltage increments were possible so we just increased the frequency until things became unstable. The highest stable core clock was 1,030MHz, a 9 percent gain over Powercolor's frequency and 12 percent faster than stock. The memory maxed out at 1.55GHz (6.2GHz effective), which is a 13 percent gain which gave the card a new total memory bandwidth of 198.4GB/sec. You can see the results of our overclocking efforts below.