Overvolting 7870 OC, pointless?

IceVip

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May 2, 2013
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I have a Sapphire 7870 Dual-X OC. 1050/1250 stock. and VDDC 1.250v stock.

I can raise the the voltage to 1.299v from Sapphire TriXX but the problem is,
i notice 0% difference whether if its 1.250 or 1.299, because the only time it goes
up to 1.299v (if i set it to it) is when it does nothing, it makes the (0.825v) go to that, when i launch something 3d, this happens.

73397386.png


And if i put the power limiter to 20+ and then put the VDDC through Sapphire Trixx to 1.299v without changing any clocks, this is what happens.

123xx.png


Could someone please explain me how the hell am i suppose to clock the card to 1200/1450 like other people do when the voltage can't even reach its on default while being at 1.299v in trixx?
The maximum stable that i got was 1100/1300, with stock and modified volts. It makes absolutely no difference.
 

ihog

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Overclocking is never guaranteed. Every chip is different.

So you can achieve stability at 1100/1300 at stock voltage, but you can't get higher than that even with the voltage raised? If that's the case, then there's no point in raising the voltage.
 

IceVip

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May 2, 2013
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I know but this makes no sens, some people got their cards at 1200/1500 with 1.219v, how come my card cant do even 1200 core with 1250 memory at 1.299v
 

chrisafp07

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Nov 27, 2012
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It is like Ihog said, every chip is different. The results of overclocking can and will be drastically different than others. I bought a 7850 that I have sitting in its box because it couldn't overclock at all and was past the return date.. so I bought a different one for my xfire setup and it overclocks like the 1st card easily. It is annoying but with cpus and gpus they can be different performers batch to batch.
 

IceVip

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May 2, 2013
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Darn it why do i always have the luck to get a hold of such chip's, 1st my q9550 which can't bypass 3.6, then the 6870 which could barely clock and was voltage locked, now my first voltage unlocked does nothing, great.