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GTX 570 overclocking

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Graphics card Expert
Overclocking Authority
Memory Master

I'm looking for the overclocking results of those who have GTX 570 video cards.

Default 570 clocks:
Core: 732
Shader: 1464
Memory: 1900 (3800 effective)

Factory overclock for my card:
Core: 750
Shader: 1500
Memory: 1950 (3900 effective)

Current overclock:
Core: 850
Shader: 1700
Memory: 2100 (4200 effective)

My card is the Palit GTX 570 Sonic, which I got because of the non-reference dual-fan cooler. I'm using MSi's Afterburner utility to overclock. My current overclock seems to be stable, but I'm wondering what other GTX 570 users have gotten so I can see when I might be approaching the overclocking ceiling.

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Graphics card Expert
Overclocking Authority
Memory Master

Nobody else is overclocking their GTX 570 cards? Or are you all keeping your results a closely-held secret? C'mon folks!

By the way, I'm up to:
Core: 875
Shader: 1750
Memory: 2000 (following Psycho's advice)
Still with no voltage adjustment.
Graphics card Expert
Overclocking Authority
Memory Master

Nah. I don't want to blow up my 570, and people have even blown them up at 1.075v according to a thread at Overclock.net forums. Apparently the power circuitry isn't up to snuff on 570s.

Edit: Admittedly, those have been cards based on the reference design with four power phases. Apparently my Palit Sonic has six (GPU) plus two (RAM) phases -- at least according to pics of a Sonic Platinum. I'm not about to rip my card apart to find out though.
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