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AMD Radeon HD 6990 and guarantee overclock

“La possibilità di abilitare un bios overcloccato, per superiori prestazioni velocistiche, si scontra con le limitazioni della garanzia fornita da AMD”

Con il debutto della scheda Radeon HD 6990 , nuova proposta al vertice della gamma di schede video per il settore desktop, AMD non solo ha guadagnato lo scettro di produttore della scheda video a singolo slot più veloce sul mercato ma ha anche implemented a new feature: manage different clock frequencies of the GPU, and then performance levels, enabling one of two BIOS chips onboard. Using the standard bios
the clock frequency of the two GPUs is equal to 830 MHz with a maximum TDP is shown in 375 Watt. Enabling the second bios the clock frequency of the GPU increases up to 880 MHz, with the TDP which goes up to 450 watts maximum quality.
is not clear so far whether the use of the second set of bios, the one with clock speeds increased, involving the violation of terms of product warranty as provided by AMD. The specifications of talk about default clock frequency of 830 MHz and overclocked to 880 MHz contextual overvolt GPU mean exceeding the predefined specifications from the manufacturer and therefore a breach of warranty. To address this
AMD provides some information about the mode of action of the two bios and what the implications are obtained by setting more driven by the performance point of view. We report in this particular passage:

Do not use the setting 450W Unless you are familiar with overclocking and are using high-quality system components to ENSURE maximum system stability. If you encounter system instability or other unexpected system performance while using the 450W setting, return the graphics card to the factory-supported 375W setting, as your system May Properly not be equipped to handle the 450W Increased Demands of the setting.

AMD also specifies that:

AMD Does Not Provide support or service for issues or damages related to use of an AMD graphics card outside of specifications or in excess of factory settings. You May Also not receive support or service from your system manufacturer.

Although the bios overclocking is supplied already programmed with the video card AMD specifies how to use clock frequencies higher than the default violates the terms of the guarantee and therefore AMD is not responsible for any damage of the product if used in a out of specification. Why
AMD has chosen to integrate a feature to overclock via the bios and switch the same time do not provide cover under warranty? One explanation may be directed by its own power requirements: overclocking the card can consume up to a maximum of 450 watts, with the heavy demands to 'feeder that may not be able to cope with this load level. AMD, although we are sure that your card can work correctly with overclocking via BIOS setting can not guarantee the same for the remaining components, power supply in the first place.
remember that the Radeon HD 6990 have the mechanical switch with which to change the bios covered with a sticker, which indicates going to read your motherboard manual and consult the information in the page above in order to take note of the existing limitations in overclocking with respect to the warranty.