If you have the new Geforce GTX 590, then you need to be careful when overclocking the graphics card with the 267.52 drivers. Otherwise, you may burn up your card. Then again, overclocking the graphics card with 1.025 volts being sent to the core might not be that smart either. Anandtech used just 0.987 Volts on the GPU core.

IMPORTANT: The supplied Geforce Drivers 267.52 for Geforce GTX 590 will not stop the card from overheating when overclocking. Please use newer versions from the Nvidia website and stay away from 267.52. Otherwise this may happen …

Settings used during card failure:
GPU Clock @ 772 MHz
GPU VCore @ 1,025 V

via : Geforce GTX 590 burns @ SweClockers.com

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