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6870 Overclock Performance

post #1 of 3
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I was originally planning on getting two 6850s, one at a time, and very recently, I got my first one. I overclocked it to 1000/1175 using 1.2V.

Today, I see a 6870 reference design going for $200, $180 after MIR. I want to buy two, and sell my current 6850. I want to know the OC performance before I buy it. I know it sounds like a bad idea, I know that my card is god and runs cool, but I have the power, I have the money, and I can support the heat and space. Since I'm getting watercooling soon, I would like the option of having a reference 6870 than my non-reference PCB 6850 if I ever add GPU waterblocks to my setup.

What are 6870 MSI Afterburner limits? Can I go beyond 1000/1175 with only 1.2V? Can it overclock even further?
Any criticism would especially be helpful. I may be delirious, so if you think it's a terrible idea, tell me now and why. At least I'm not the guy who upgraded 4x480 to 4x580...
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post #2 of 3
Quote:
Originally Posted by Buska103 View Post
I was originally planning on getting two 6850s, one at a time, and very recently, I got my first one. I overclocked it to 1000/1175 using 1.2V.

Today, I see a 6870 reference design going for $200, $180 after MIR. I want to buy two, and sell my current 6850. I want to know the OC performance before I buy it. I know it sounds like a bad idea, I know that my card is god and runs cool, but I have the power, I have the money, and I can support the heat and space. Since I'm getting watercooling soon, I would like the option of having a reference 6870 than my non-reference PCB 6850 if I ever add GPU waterblocks to my setup.

What are 6870 MSI Afterburner limits? Can I go beyond 1000/1175 with only 1.2V? Can it overclock even further?
Any criticism would especially be helpful. I may be delirious, so if you think it's a terrible idea, tell me now and why. At least I'm not the guy who upgraded 4x480 to 4x580...
the Asus 6870 has a voltage tweak that allows 1.4v. you have to increase the vcore alot once past 1ghz. i reckon they'll hit 1200mhz-1300mhz. the extra voltage to the ram on a 6870 should allow u to hit about 4.8ghz on the memory. just MAKE SURE you have a good heatsink on your voltage regulator.
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post #3 of 3
Quote:
Originally Posted by Buska103 View Post
I was originally planning on getting two 6850s, one at a time, and very recently, I got my first one. I overclocked it to 1000/1175 using 1.2V.

Today, I see a 6870 reference design going for $200, $180 after MIR. I want to buy two, and sell my current 6850. I want to know the OC performance before I buy it. I know it sounds like a bad idea, I know that my card is god and runs cool, but I have the power, I have the money, and I can support the heat and space. Since I'm getting watercooling soon, I would like the option of having a reference 6870 than my non-reference PCB 6850 if I ever add GPU waterblocks to my setup.

What are 6870 MSI Afterburner limits? Can I go beyond 1000/1175 with only 1.2V? Can it overclock even further?
Any criticism would especially be helpful. I may be delirious, so if you think it's a terrible idea, tell me now and why. At least I'm not the guy who upgraded 4x480 to 4x580...
That's not such a bad idea if you've ever heard what a 480 sounds like at load.

I say go for the two 6870s. Only problem I see with the 6870s is the noise. I had a 6870 prior to going Green and getting a 570 and when overclocked to 1GHz the fan gets pretty loud even with a custom fan profile. :/

But if noise is not something to worry about then the performance you'll get will surely be enough to carry you to play any game out there with decent enough performance.

Good luck on the decision. Don't let us decide if you should spend your money.
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