Pushing an overclocked card past the limits of the factory clocks can sometimes prove fruitful. The Zotac Amp Edition GTX280 is a well clocked card to begin with so the low lying fruit had already been plucked. That being said I was able to pull another 38MHz out of the GPU core and another 156MHz out of the memory. Both of these increases delivered improved results with one additional cost, an increase in the fan speed. That cost however, depends on how high your noise tolerance is. 100% is fairly loud from outside the case while around 65% is more along the level that is acceptable for me. Pushing past 65% did not show any clock speed gains so that's where it was left. The clock speed increases represent a 5% increase on the GPU and 12% increase on the memory. Not a huge increase on the GPU but the memory went over 1300MHz , a rarity for a non volt modded card.