Gtx 570 Overclocking and Questions

Hello, I am currently trying to overclock my gtx 570 using msi afterburner.

I've been stress testing using furmark, and my temperatures stay below 80c at the highest tested settings of:

900Mhz clock speed
1800Mhz shader clock
2000Mhz memory clock

I've also tested lower voltages and clock speeds, however i keep getting the

Opengl driver error 7 -

I have a few questions:

Is the opengl error hardware related at all? If i were to get a new identical graphics card would i have the same error?

Even with very good temperatures at higher speeds, does the opengl driver error mean the overclock is unstable, or is it a different problem altogether?

Is there a way to fix the opengl error?

Thanks for your time and your help.

Processor: Intel i7 3770k 4.4ghz

Memory: CORSAIR Vengeance 16GB (2 x 8GB) DDR31600

Hard Drive: intel 520 120GB sata 3 ssd

Video Card: msi twin frozr II nvidia gtx 570

Motherboard: asus p8z77-v

Power Supply: seasonicx x650 gold 650w psu

Operating System: windows 7 64 bit
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More about overclocking questions
  1. When overclocking the reason for stress testing the overclock is to prove stability and when you don't then you have to either add voltage or if your at the limit then back off a bit. The 1.075v is very near the limit and as we all know any chip will or will not be a good overclocker so there is no standard for what you should be getting for an overclock. Try backing off a bit and see what happens.
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