You have to set the trimmers to max ohm before powering up the card becaus you dont now how much voltage you will put in the card and maybe you will fry your card!
you can forget about 950 at least many people dont even get that kind og speed under Ln2 i have a lucky card and i have testet many cards and only mine clocks that high on water so set your mind on 875+ mhz the you wont be dissapointed my freind