I am thinking of getting the Accelero Hybrid cooler for my HD 7970 gfx card. With the stock cooler, it overclocks to (GPU) 1125Mhz / (vRAM) 1575MHz through CCC, with no voltage tweaks applied, with stock cooling. This in itself is a pretty hefty overclock considering the default clocks of 925/1325 MHz. I would therefore like to get a bit of a consensus on how high these cards can go with sensible volt increases and improved cooling. Thx.