BitTech reports overclocker TiN managed to push a GeForce GTX 690 4GB to a whopping 1547MHz with the help of liquid nitrogen! Full details over here, TiN also managed to hit 1450MHz with a pair of GeForce GTX 690s in SLI.
User TiN over the on the Kingping Cooling forums took a stock Nvidia GTX 690 4GB dual-GPU graphics card - already the fastest card around - and subjected it to below-zero temperatures using liquid nitrogen cooling in order to achieve his world-record result. Originally, TiN had pushed the board to 1,600MHz, but stability issues forced a drop to 1,547MHz at which point the card was reportedly completely stable.
The impressive overclock left the board running over 500MHz above its stock clock, and pushed the board's 4GB of GDDR5 video memory to an effective speed of 7,336MHz. The results in the 3DMark 11 benchmarking suite are nothing short of breathtaking: paired with an Intel Core i7-3960X Sandy Bridge-E processor running at 4.5Ghz, TiN scored 20,962 points - a full 50 per cent above the stock clocks in the same system.