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3870 Crossfire OC on water? Input pls

post #1 of 9
Thread Starter 
Just wondering what you guys are getting with extra voltage on water (or air for that matter)
I'm going to sell my 2900XTs pretty soon for some extra cash (while they're still valuable) and get a pair of 3870 GDDR4s.
This will hold me over until the RV770 arrives

According to this it's looking pretty good....
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post #2 of 9
hey with I got this result with 1.45v on the core

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post #3 of 9
Thread Starter 
Nice! Is that stable 24/7 for gaming? That's also 0.10V more than my 2900XTs which get 950 at that VGPU.....however it's worth it for the lower price.
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post #4 of 9
Quote:
Originally Posted by binormalkilla View Post
Nice! Is that stable 24/7 for gaming? That's also 0.10V more than my 2900XTs which get 950 at that VGPU.....however it's worth it for the lower price.

that was on air.. I never ran it that high during gaming...I still don't and it's on water now. The next strap after 945 is like 958 and I never tried that clock.

though I do have a validation of 999/1350 with the same voltage. However, that more than likely was not stable.

When I benchmark I always put the cores at the same speed as it's more stable that way anyways. I haven't got around to upping the volts on the X2 yet, so 918 is as far as I go on all the GPU's during benching.
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post #5 of 9
Thread Starter 
Wow that's freaking awesome on air....nice. What's the default VGPU on these cards?
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post #6 of 9
Quote:
Originally Posted by binormalkilla View Post
Wow that's freaking awesome on air....nice. What's the default VGPU on these cards?

1.325 under load.
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post #7 of 9
Thread Starter 
Oh ok well these run well over what mine do at default (1.15V in full 3d mode)
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post #8 of 9
does anyone now what the max voltage the 3870 his ice Q can take ? i wanan give this ago so far i can only get 845/1200 !
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post #9 of 9
Quote:
Originally Posted by mattass View Post
does anyone now what the max voltage the 3870 his ice Q can take ? i wanan give this ago so far i can only get 845/1200 !
There are quite a few gents running it around 1.55v. Though that was super hard to achieve with 2B lead. =o( Time for a 100k and some solder!
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