radeon hd 7750 going down to 300 mhz

i have a radeon 7500 and when i use the overdrive software in the catalyst center to 900 mhz core clock, 1250 mhz memory clock and +30% it is fine.. the temp doesnt go more than 45 c. i test it with furmark and it run smooth, then i test it in a game (dota 2) and after a few minutes the screen goes black and after i check the catalyst it says that the card is only going at 300mhz, any ideas? or is it just that it doesnt go that far
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  1. Best answer
    Most likely yes it is probably that your card can't handle that clock rate. Try resetting it back to stock clock rates and see if it happens. If it doesn't happen then it is that your clock rates are simply too high
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