To get the most out of any video card, you have to keep it cool! With that rule in mind and not having an LN2 pot hanging around, the only option I had was to increase the fan speed to 100% to keep the ENGTX275 as cool as possible during testing. After bumping the fan speed up, I started by pushing the GPU core up in 20MHz steps until it would lock up in testing. I followed suit with the shaders and memory to find their limits. Once the limits were found, it was a matter of getting the three parameters to work together. I ended up with solid increases on all three speeds. 731MHz on the core is a 98MHz increase over the stock 633MHz. The shaders offered a bump of 124MHz and the memory was the big winner with a huge bump of 172MHz. This overclock delivered solid increases in performance allowing this card to deliver performance almost equal to that of the ENGTX285 TOP, a factory overclocked card also from ASUS.