help OC GTX570 CU II

[kel2985]

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I just overclock my GTX570 direct CU II to 824/1648/3800 1.075v.
I did not overclock the RAM yet. I use ASUS smart doctor for overclocking.
on Furmark and 3dmark11 has no problem but only in Crysis 1.
it will make a random crash and I receive an error message display driver not responding.

could it be the voltage is not enough?
I just want to fallow the settings of the EVGA GTX570 classified 822/1645/3902.

sa 1.05v walay problem sa Furmark and 3dmark11.

[Koikoi]

huwat lng ta mga master mo comment ani......