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Can you overclock the GPU in a prebuilt system?

Last response: in Graphics & Displays
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Graphics card Master
Overclocking Authority

You sure you only have a 460w PSU? AMD recommends a 500w power supply for a system with an HD 7870 in it and OEMs usually go with those guidelines. That being said, Dell has really stepped up the quality of their power supplies and I'm sure what you have provides plenty of 12v amps ( more imporant than total watts ).

Yes you can overclock you graphics card. Either with the AMD driver or a 3rd party tool like MSI Afterburner.
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Graphics card Expert

The motherboards OEM's usually use are locked down, the GPU's however are bought from other manufacturers, and have no such restrictions.

Heck, overclocked my Laptop's GT555M by 300Mhz using MSI afterburner :) 
Graphics card Expert

azathoth said:
The motherboards OEM's usually use are locked down, the GPU's however are bought from other manufacturers, and have no such restrictions.

Heck, overclocked my Laptop's GT555M by 300Mhz using MSI afterburner :) 



And how quickly did you have to reverse the overclock before you damaged the GPU?
Graphics card Master
Overclocking Authority

Not enough to matter. Dell is very good with power supplies an would not put one in that is straining to run at the limits. As I said above amps are more important than watts.
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