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6950 flashed to 6970 ...do I now need to up voltage it it? - Page 2

post #11 of 14
Thread Starter 
Thanks for those replies.

So now if I now bump up the voltage to about 1.25-1.3 as suggested, how exactly will it benefit my GPU's?

Is it just a matter of the manufacturers suggested voltage "sweet spot" where they operate at their best? I read a few days ago about the higher voltage difference between a 6950 and 6970....so having these flashed cards set to 6970 specs seems like the right thing to do.

I also read something about how the 6970 uses a different VRM or something like that..cant quite recall at the moment.... compared to a 6950 ....so some people suggest don't raise voltage...

What sort of things would you possibly notice if the voltage setting is set a bit too low on the flashed cards? I see many people don't mess with the voltage but it seems logical, seeing how a 6970 is running at a higher voltage. Cooling shouldn't be an issue...even for the VRM's.

I'm not too worried about power usage. I always shut my computer off when not gaming so that's not an issue for me.
After reading about the Raidmax, I wouldn't have bought it...if I could have done it over. But for the price, it wasn't too bad. At least it lasted me for the 3 months I used it.
post #12 of 14
Quote:
Originally Posted by OldtimeGamer View Post

Thanks for those replies.

So now if I now bump up the voltage to about 1.25-1.3 as suggested, how exactly will it benefit my GPU's?

Is it just a matter of the manufacturers suggested voltage "sweet spot" where they operate at their best? I read a few days ago about the higher voltage difference between a 6950 and 6970....so having these flashed cards set to 6970 specs seems like the right thing to do.

I also read something about how the 6970 uses a different VRM or something like that..cant quite recall at the moment.... compared to a 6950 ....so some people suggest don't raise voltage...

What sort of things would you possibly notice if the voltage setting is set a bit too low on the flashed cards? I see many people don't mess with the voltage but it seems logical, seeing how a 6970 is running at a higher voltage. Cooling shouldn't be an issue...even for the VRM's.

I'm not too worried about power usage. I always shut my computer off when not gaming so that's not an issue for me.
After reading about the Raidmax, I wouldn't have bought it...if I could have done it over. But for the price, it wasn't too bad. At least it lasted me for the 3 months I used it.

Any price for a PSU like that one is bad. wink.gif

Anyway, this reminds me of when I flashed a GTX 465 to a GTX 470: I had to increase the voltage because otherwise it wasn't stable. The concept was to play the role of the manufacturer: to make it stable. You see, the GTX 465s were actually just GTX 470s that had to be reduced to a GTX 465 because they couldn't meet the standards for the GTX 470 or something. So we just flashed them and many of us had to increase the voltage to perhaps what the manufacturer would have used if they tried to sell it as a GTX 470.

With the 6950, I'm not sure if it's exactly the same, but it seems to me that it would have to be because how else would it be possible to flash it to a 6970? Still, if the VRM is a problem, then I can see how raising the voltage could present problems. After all, it's the Voltage Regulator Module.
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post #13 of 14
Quote:
Originally Posted by OldtimeGamer View Post

Thanks for those replies.

So now if I now bump up the voltage to about 1.25-1.3 as suggested, how exactly will it benefit my GPU's?

Is it just a matter of the manufacturers suggested voltage "sweet spot" where they operate at their best? I read a few days ago about the higher voltage difference between a 6950 and 6970....so having these flashed cards set to 6970 specs seems like the right thing to do.

I also read something about how the 6970 uses a different VRM or something like that..cant quite recall at the moment.... compared to a 6950 ....so some people suggest don't raise voltage...

What sort of things would you possibly notice if the voltage setting is set a bit too low on the flashed cards? I see many people don't mess with the voltage but it seems logical, seeing how a 6970 is running at a higher voltage. Cooling shouldn't be an issue...even for the VRM's.

I'm not too worried about power usage. I always shut my computer off when not gaming so that's not an issue for me.
After reading about the Raidmax, I wouldn't have bought it...if I could have done it over. But for the price, it wasn't too bad. At least it lasted me for the 3 months I used it.


Your stock voltage on ref or flashable 6950s is 1.1v or less. Jumping to 1.25v-1.3v is crazy especially if you are on the stock cooler or any air cooler for that matter. That's an endeavor for only experienced people with proper cooling (watercooling etc). Reference 6950s are identical to 6970s except for the ram chips with 6970s ram chips being able to generally clock higher due to their higher speed rating.

6970 stock volts is 1.17v btw, so for most purposes 1.2v is safe. However it needs repeating the stock coolers on reference cards do not perform well with increased volts unless you live in a climate with incredibly low ambient temps.

Quote:
Originally Posted by rockgod213 View Post

You can safely up the voltage to about 1.25-1.3 assuming temps are kept in check, which they should be with that cooler. Keep in mind your power usage is going to shoot right up.

rolleyes.gif
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post #14 of 14
Thread Starter 
I was looking at GPU-Z last night and it showed my flashed 6950s were running at only 0.9 volts. I think it showed .999v (At least this is according to GPU-Z)

They are keeping pretty cool with the Arctic Cooling III fans installed on both of them. I run both sets of triple fans at 100% all the time.

To say they are close together is an understatement. The fan housing of the upper card, slightly touches the card bellow it. .....So things are tight.

I think I mentioned that I even installed a custom VRM cooler with an 80mm fan to the upper card as well. And I also installed a 120mm case side fan, that blows on them, at full speed as well. The upper card only runs about 3 degrees higher than the lower card..so I have cooling pretty under control.

I think I will jump the voltage up to 1.2volts but I guess I need to first confirm GPU-Z is accurate, in showing 'm only at .9volts right now and not showing less than they really are.

Even if I were to step them up to a solid 1.1 volts ..not sure if that would really make a difference meaning easier on the 6950's components but still make a difference for performance.
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