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Thread: Need Help On Overclocking

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    Default Need Help On Overclocking

    I have RivaTuner but I do not know how much I should overclock my GeForce 4 MX420 graphics card to.

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    put +20mhz on gpu/mem and check with 3dmark for artifacts. if you dont see any suspicious things - put +20mhz more and so on until you see visual artifacts. then start lowering the values by 1 and when you don't see any trash - that's your max rates.

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    Can you tell me whre to get this 3dmark artifacts?

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    http://en.wikipedia.org/wiki/Artifact_(observational)

    artifacts is not something you get. it's when graphic card produces noticable errors.

    you can download 3dmark from here http://www.futuremark.com/download/

    choose 3dmark2001 or 3dmark03.

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    You can also do the same as Fuflo said but with ATI Tool if you want. It is like Riva Tuner but has a built in artifact tester.

    Essentially when you increase the running frequency of a chip (by overclocking) too far the core or memory just can't carry on producing accurate calculations or hold data integrity, it starts to create mistakes or errors, and at worst will crash completely. The errors show themselves as artifacts.

    Artifacts are pixels in the produced image that clearly should not have been rendered. Its usually simple to notice these as they show themselves as garbled mess.

    ATI tools artifact window automatically scans for errors in the image by using a reference image and it will compare the reference image to the one being produced by your card (hundreds of times per second probably).

    It's how I test my overclocks before moving into a game for final testing.

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    Yeah, I turned up the Mhz by 5, then I saw that when I was testing with 3dmark I saw black squares and stuff flashing then I turned my core and memory down by 5 again and now its better.

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    back in time when i had gx4mx 480 128bit i was able to put gpu +80mhz and mem +50mhz. with stock cooling.

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